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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Small and medium-enterprises &#40;SMEs&#41; play a major role in economic growth and employment&#44;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">1</span></a> with workers at great risk of work-related ill health&#46;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">2</span></a> Metal-based SMEs are recognised as the SMEs in which heavy physical work activities that cause musculoskeletal disorders &#40;MSDs&#41; are frequently performed&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">In Europe&#44; the total cost of lost productivity attributed to MSDs among people of working age was estimated to be as high as 2&#37; of the gross domestic product&#46;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">3</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Lifting activities&#44; repetitive movements&#44; and awkward lifting postures may alleviate the risk of developing work-related MSDs&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">4</span></a> Moreover&#44; workers who handle heavy loads with awkward postures &#40;86&#46;4&#37;&#41; had a higher percentage of developing MSDs than those who frequently manually handle heavy loads &#40;45&#46;5&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Individual risk factors for MSDs have been identified&#44; such as age&#44;<a class="elsevierStyleCrossRefs" href="#bib0155"><span class="elsevierStyleSup">6&#44;7</span></a> gender&#44;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">8</span></a> body mass index &#40;BMI&#41;&#44;<a class="elsevierStyleCrossRefs" href="#bib0170"><span class="elsevierStyleSup">9&#8211;11</span></a> smoking status&#44;<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">12&#44;13</span></a> and lifting capacity &#40;found to be the greatest in the 29&#8211;38-year-old age group&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">14&#44;15</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Previous studies showed that musculoskeletal symptoms &#40;MSSs&#41; in the lower back region prevailed among manual handling workers&#46; Moreover&#44; the prevalence of MSS has been reported as follows&#58; 79&#37; and 69&#46;1&#37; for the lower back&#44; 70&#37; and 50&#37; for the neck&#44; 64&#37; for the knee&#44; and 59&#37; and 45&#37; for the shoulder&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">16</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">With this background&#44; this study analysed the risk factors of MSDs associated with different work postures during metal-based product fabrication&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Methods</span><p id="par0035" class="elsevierStylePara elsevierViewall">This work is a cross-sectional study that analysed working posture and MSDs at two metal-based SMEs at Bogor Regency&#44; Indonesia&#46; Body postures were examined using the Rapid Entire Body Assessment &#40;REBA&#41; method&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">17</span></a> Interviews were performed to obtain the respondents&#8217; characteristics&#44; such as age&#44; work period&#44; smoking status&#44; and musculoskeletal symptoms &#40;MSSs&#41;&#59; as well as details of the way they perform their tasks &#40;frequency and duration of the work&#41;&#46; In total&#44; 20 respondents were interviewed&#44; who actively work in the workshops&#46; The workers&#8217; BMI index was obtained by measuring their height &#40;in metre&#41; and weighting their body mass &#40;in kg&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">REBA assessment was done by analysing photos that were taken while workers performed their job&#46; A total of 28 postures were analysed to assess the neck&#44; trunk&#44; and leg postures &#40;A score&#41; and arm and wrist postures &#40;B score&#41;&#46; The final score of body posture &#40;A<span class="elsevierStyleHsp" style=""></span>&#43;<span class="elsevierStyleHsp" style=""></span>B score&#41; further is compared with REBA criteria for risk level determination&#46; Furthermore&#44; Nordic Musculoskeletal Questionnaire<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">18</span></a> was used to investigate the workers&#8217; MSS experience in nine body regions&#58; neck&#44; shoulder&#44; upper back&#44; elbow&#44; lower back&#44; wrist&#44; buttock&#44; knee&#44; and ankle&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Result</span><p id="par0045" class="elsevierStylePara elsevierViewall">SME 1 has two workshops&#44; one for producing stuff made of steel&#44; such as trellis&#44; flowerpot&#44; and pet cage&#46; In the time of the observation was conducted&#44; workers in SME 1 was producing trellis&#44; flowerpot made of metal&#44; and producing metal seat using pound machine&#46; Producing trellis and flowerpot involves tasks such as lifting&#44; cutting and smoothing using grinder&#44; bending&#44; welding&#44; and cleaning product&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">There were three jobs that were observed in SME 2&#44; i&#46;e&#46; producing pole trash can&#44; producing bowls using a lathe machine&#44; and moulding metal seat using pound machine&#46; Pole trash can production involves tasks such as cutting&#44; and smoothing using a grinder&#44; welding&#44; and hollowing out the metal using drilling&#46;</p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Descriptive sample</span><p id="par0055" class="elsevierStylePara elsevierViewall">The descriptive sample is presented in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46; Most of the respondents were smokers &#40;85&#37;&#41; with an average age of 36&#46;8 years and an average BMI of 22&#46;8<span class="elsevierStyleHsp" style=""></span>kg&#47;m<span class="elsevierStyleSup">2</span> &#40;normal&#41;&#46; The average work period of the workers was 0&#46;8 years &#40;9 months and 6 weeks&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Prevalence of MSSs for each body region in relation to the individual risk factors</span><p id="par0060" class="elsevierStylePara elsevierViewall">The prevalence of MSSs during the last 12 months is presented in <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#46; About 95&#37; of the respondents reported MSSs in any of the nine body regions&#46; MSSs were most frequent in the lower back &#40;65&#37;&#41;&#44; wrists &#40;45&#37;&#41;&#44; shoulders &#40;35&#37;&#41; and ankles &#40;35&#37;&#41;&#46; The lowest frequency of MSSs was in the upper back &#40;10&#37;&#41; and elbows &#40;10&#37;&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0065" class="elsevierStylePara elsevierViewall">MSSs in the four most frequent body regions were more prevalent among smokers&#44; workers aged over 30 years&#44; those with normal BMI&#44; and those who had worked for less than 4 years&#46; In addition&#44; MSSs in the ankle region were reported to have the same prevalence for workers with a normal BMI and body fat percentage&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Level of physical risk factors</span><p id="par0070" class="elsevierStylePara elsevierViewall">The levels of physical risk factors are presented in <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#46; The REBA scores were determined by analysing the risks of various postures&#44; which were rated from low to very high&#46; The physical risk factors were predominantly high risk &#40;60&#46;7&#37;&#41;&#44; followed by medium risk &#40;25&#46;0&#37;&#41;&#44; very high risk &#40;10&#46;7&#37;&#41;&#44; and low risk &#40;3&#46;6&#37;&#41;&#46; This report presented the result of posture analysis at each task from SME 1 and 2&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0075" class="elsevierStylePara elsevierViewall">The activities from SME 1 were pressing using pound machine&#44; wiping product&#44; dismantling product&#44; lowering product&#44; lifting product&#44; washing product&#44; hanging product&#44; stringing product&#46; The activities from SME 2 were lifting&#44; using drilling machine&#44; using lathe machine&#44; and using pound machine&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">Higher risk in most of lifting activities was dominated by high point on upper arm posture &#40;i&#46;e&#46; lowering&#44; lifting using pulley&#44; and hanging&#41; and trunk posture &#40;i&#46;e&#46; dismantling and manual lifting&#41;&#46; In lowering and stringing activities both upper arm and trunk posture had higher points&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">Using the pound machine in SME 1 was dominated by higher point on upper arm posture&#44; while in SME 2&#44; it was dominated by higher point on the trunk&#46; Cleaning activities&#44; using drilling machines and lathe machines were dominated by higher points on upper arm posture&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Most of the activities which were done in standing and squatting position were dominated by high point on upper arm&#46; The difference between those two positions was affected by the material position that was handled&#44; especially for lifting activities&#46; Material which is on the floor tends to affect trunk posture to be on higher position&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Discussion</span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Lifting</span><p id="par0095" class="elsevierStylePara elsevierViewall">Lifting using a motorised pulley helps workers to decrease the level of risk&#46; In lifting activities involving the hanging rail&#44; upper arm flexion is caused by the hanging rail height&#44; which exceeds the elbow level&#46; In other cases&#44; upper arm flexion is caused by the position of the products that are placed on the floor&#44; which causes the workers&#8217; trunk to bend&#46; In other studies&#44; lifting from low positions was found to put more pressure on the L5&#47;S1 spine&#44; whereas lifting from high positions put more pressure on the shoulders&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">19</span></a> Moreover&#44; the frequency of lifting is associated with an increase in shoulder pain intensity&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">20</span></a> Therefore&#44; working the height for lifting activities is suggested to be at or below the elbow height&#46;<a class="elsevierStyleCrossRef" href="#bib0230"><span class="elsevierStyleSup">21</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Using the pound machine</span><p id="par0100" class="elsevierStylePara elsevierViewall">The workers&#8217; posture while using one of the types of pound machines was categorised as high risk&#44; and the posture while using the other machine was categorised as medium risk&#46; This varying categorisation was due to the machine difference&#44; as one uses a handle and the other uses a pedal&#46; The pound machine that uses a handle causes worker to grab the handle&#44; which is higher than the workers&#8217; shoulder height&#46; Conversely&#44; the machine that uses a pedal has no such requirement and provides enough legroom&#44; which allows workers to get as close as possible to the lower arm reach&#46; These differences indicate that the pound machine that uses a pedal is more recommended to be used&#46; It showed that workload reduction could be achieved by adjusting the working height according to workers&#8217; arm level and inclination trunk&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">22</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Cleaning products</span><p id="par0105" class="elsevierStylePara elsevierViewall">Wiping activities are categorised as a high- to a very high-risk job because some workers use a stool and others do not&#46; Washing activities are done in a standing position&#46; They are generally a low-risk level job&#44; but they are a medium risk for the right side of the body and a high risk for the left side of the body&#46; The differences in the level of risk are caused by some workers not using a stool&#46; Wiping and washing activities have the same tendency in the upper arms because workers usually position their hands on the product being wiped or washed&#46; This finding is consistent with those of other studies that indicated standing and sitting postures to cause less discomfort&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">23</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Using the drilling and lathe machines</span><p id="par0110" class="elsevierStylePara elsevierViewall">Activities using drilling and lathe machines are categorised as medium to very high risk&#44; and largely influenced by awkward trunk and upper arm postures&#46; Based on observation&#44; using a drilling machine in a standing position required workers to bend their bodies&#46; In addition&#44; workers had to use the handler aside from the drilling machine&#44; which affects the workers&#8217; arm posture&#46; Unlike the activities using the previous machines&#44; the activities using lathe machine are categorised as medium risk&#46; The machines tended to be unsafe because of the metal bar that directly contacts the rotating part of the machine&#46;</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Individual factors</span><p id="par0115" class="elsevierStylePara elsevierViewall">Most MSSs were found in the lower back &#40;65&#37;&#41;&#44; wrist &#40;45&#37;&#41;&#44; shoulder &#40;35&#37;&#41;&#44; and ankle &#40;35&#37;&#41; regions&#46; The MSSs in these body regions were common among workers aged 30 years and over and who were smokers&#46; This finding is consistent with previous studies that indicated the prevalence to be higher among smokers<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">13</span></a> and workers over 30 years old&#46; Specifically&#44; old age may decrease workers&#8217; muscle strength&#44; which leads to an increase in MSSs&#44; and age has also been found to be a confounding factor for the work period&#46;<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">24&#44;25</span></a> The high prevalence could be attributed to how the activities were performed&#46;</p><p id="par0120" class="elsevierStylePara elsevierViewall">In addition&#44; the MSSs in these four body regions were more common among workers with normal BMI and who had worked for less than four years&#46; Conversely&#44; previous studies showed that obese workers<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">10</span></a> and workers that have worked for more than four years<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">24</span></a> had a higher prevalence of MSSs&#46; These differences may be due to the majority of the respondents in this study having a normal BMI and having worked for less than four years&#46;</p></span></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conclusion</span><p id="par0125" class="elsevierStylePara elsevierViewall">Physical factors likely contributed more to the MSSs in the affected body regions than individual factors&#46; However&#44; the causal relationship was determined&#46; The use of tools in some activities&#44; such as lifting&#44; decreased the level of risk&#46; The position of the workers&#8217; body towards the machines or tools&#44; such as the reach of the lower arm and the working height&#44; should be considered&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Conflicts of interest</span><p id="par0130" class="elsevierStylePara elsevierViewall">The authors declare no conflict of interest&#46;</p></span></span>"
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          "identificador" => "xpalclavsec1456650"
          "titulo" => "Keywords"
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          "titulo" => "Introduction"
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          "identificador" => "sec0010"
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        4 => array:3 [
          "identificador" => "sec0015"
          "titulo" => "Result"
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            0 => array:2 [
              "identificador" => "sec0020"
              "titulo" => "Descriptive sample"
            ]
            1 => array:2 [
              "identificador" => "sec0025"
              "titulo" => "Prevalence of MSSs for each body region in relation to the individual risk factors"
            ]
            2 => array:2 [
              "identificador" => "sec0030"
              "titulo" => "Level of physical risk factors"
            ]
          ]
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          "identificador" => "sec0035"
          "titulo" => "Discussion"
          "secciones" => array:5 [
            0 => array:2 [
              "identificador" => "sec0040"
              "titulo" => "Lifting"
            ]
            1 => array:2 [
              "identificador" => "sec0045"
              "titulo" => "Using the pound machine"
            ]
            2 => array:2 [
              "identificador" => "sec0050"
              "titulo" => "Cleaning products"
            ]
            3 => array:2 [
              "identificador" => "sec0055"
              "titulo" => "Using the drilling and lathe machines"
            ]
            4 => array:2 [
              "identificador" => "sec0060"
              "titulo" => "Individual factors"
            ]
          ]
        ]
        6 => array:2 [
          "identificador" => "sec0065"
          "titulo" => "Conclusion"
        ]
        7 => array:2 [
          "identificador" => "sec0070"
          "titulo" => "Conflicts of interest"
        ]
        8 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2021-06-28"
    "fechaAceptado" => "2021-07-30"
    "PalabrasClave" => array:1 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec1456650"
          "palabras" => array:4 [
            0 => "Ergonomic"
            1 => "Musculoskeletal symptoms"
            2 => "REBA"
            3 => "Manual handling"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:1 [
      "en" => array:3 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Small and medium-sized enterprises &#40;SMEs&#41; play a major role in economic growth and employment&#44; and they come with a greater risk of work-related illnesses for workers&#46; Metal-based SMEs are recognised as the sector with the most demanding physical work activities and awkward postures&#44; which are considered risk factors of musculoskeletal disorders &#40;MSDs&#41;&#46; This study analysed the risk factors of MSDs associated with different work postures during production&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Body postures were examined using the Rapid Entire Body Assessment &#40;REBA&#41; method&#44; and the data on musculoskeletal symptoms were collected using the Nordic Musculoskeletal Questionnaire &#40;NMQ&#41;&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The results were calculated using the REBA method to determine the level of risk of various postures&#44; namely&#44; low risk &#40;3&#46;6&#37;&#41;&#44; medium risk &#40;25&#46;0&#37;&#41;&#44; high risk &#40;60&#46;7&#37;&#41;&#44; and very high risk &#40;10&#46;7&#37;&#41;&#46; The NMQ results indicated that most of the symptoms and discomfort were in the lower back &#40;65&#37;&#41;&#44; wrist &#40;45&#37;&#41;&#44; shoulder &#40;35&#37;&#41;&#44; and ankle &#40;35&#37;&#41; regions&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The physical factors contributed more to the musculoskeletal symptoms in the body regions affected&#46; The use of tools in lifting activities could decrease the level of risk&#46;</p></span>"
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            "identificador" => "abst0020"
            "titulo" => "Conclusions"
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      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Peer-review under responsibility of the scientific committee of the 3rd International Nursing&#44; Health Science Students &#38; Health Care Professionals Conference&#46; Full-text and the content of it is under responsibility of authors of the article&#46;</p>"
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">12&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">60&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Upper back&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Elbow&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lower back&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">13&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">65&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wrist&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">45&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Buttock&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Knee&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Ankle&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">35&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Any MSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">95&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab2781810.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Prevalence of MSSs&#46;</p>"
        ]
      ]
      2 => array:9 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "fuente" => "Source&#58; Primary Data &#40;2019&#41;&#46;"
        "detalles" => array:1 [
          0 => array:3 [
            "identificador" => "at3"
            "detalle" => "Table "
            "rol" => "short"
          ]
        ]
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Activities&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Score A&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Score B&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">REBA score&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Pressing using pound machine&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wiping product &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wiping product &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wiping product &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dismantling product&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lowering product&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting product to be soaked using pulley&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting product to be soaked using pulley &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting product to be soaked using pulley &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting product to be washed&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Washing product &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Washing product &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hanging product&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Stringing product&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hanging product in painting area&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting product which have been painted&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hanging product in oven&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lifting materials&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Using drilling machine &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Using drilling machine &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Using lathe machine &#40;left body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Using lathe machine &#40;right body&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Using pond machine&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab2781809.png"
              ]
            ]
          ]
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Vol. 35. Núm. S2.
The 3rd International Nursing and Health Sciences Students and Health Care Professionals Conference (INHSP)
Páginas S360-S363 (enero 2020)
Open Access
Ergonomic assessment in metal-based small industries in Bogor Regency, Indonesia, 2019
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Prima Andriani, Mila Tejamaya
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, Baiduri Widanarko, Amelia Anggarawati Putri
Occupational Health and Safety Department, Faculty of Public Health, Universitas Indonesia, Indonesia
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Table 1. Descriptive sample.
Table 2. Prevalence of MSSs.
Table 3. Level of physical risk factors.
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Vol. 35. Núm S2

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Abstract
Objective

Small and medium-sized enterprises (SMEs) play a major role in economic growth and employment, and they come with a greater risk of work-related illnesses for workers. Metal-based SMEs are recognised as the sector with the most demanding physical work activities and awkward postures, which are considered risk factors of musculoskeletal disorders (MSDs). This study analysed the risk factors of MSDs associated with different work postures during production.

Methods

Body postures were examined using the Rapid Entire Body Assessment (REBA) method, and the data on musculoskeletal symptoms were collected using the Nordic Musculoskeletal Questionnaire (NMQ).

Results

The results were calculated using the REBA method to determine the level of risk of various postures, namely, low risk (3.6%), medium risk (25.0%), high risk (60.7%), and very high risk (10.7%). The NMQ results indicated that most of the symptoms and discomfort were in the lower back (65%), wrist (45%), shoulder (35%), and ankle (35%) regions.

Conclusions

The physical factors contributed more to the musculoskeletal symptoms in the body regions affected. The use of tools in lifting activities could decrease the level of risk.

Keywords:
Ergonomic
Musculoskeletal symptoms
REBA
Manual handling
Texto completo
Introduction

Small and medium-enterprises (SMEs) play a major role in economic growth and employment,1 with workers at great risk of work-related ill health.2 Metal-based SMEs are recognised as the SMEs in which heavy physical work activities that cause musculoskeletal disorders (MSDs) are frequently performed.

In Europe, the total cost of lost productivity attributed to MSDs among people of working age was estimated to be as high as 2% of the gross domestic product.3

Lifting activities, repetitive movements, and awkward lifting postures may alleviate the risk of developing work-related MSDs.4 Moreover, workers who handle heavy loads with awkward postures (86.4%) had a higher percentage of developing MSDs than those who frequently manually handle heavy loads (45.5%).5

Individual risk factors for MSDs have been identified, such as age,6,7 gender,8 body mass index (BMI),9–11 smoking status,12,13 and lifting capacity (found to be the greatest in the 29–38-year-old age group).14,15

Previous studies showed that musculoskeletal symptoms (MSSs) in the lower back region prevailed among manual handling workers. Moreover, the prevalence of MSS has been reported as follows: 79% and 69.1% for the lower back, 70% and 50% for the neck, 64% for the knee, and 59% and 45% for the shoulder.16

With this background, this study analysed the risk factors of MSDs associated with different work postures during metal-based product fabrication.

Methods

This work is a cross-sectional study that analysed working posture and MSDs at two metal-based SMEs at Bogor Regency, Indonesia. Body postures were examined using the Rapid Entire Body Assessment (REBA) method.17 Interviews were performed to obtain the respondents’ characteristics, such as age, work period, smoking status, and musculoskeletal symptoms (MSSs); as well as details of the way they perform their tasks (frequency and duration of the work). In total, 20 respondents were interviewed, who actively work in the workshops. The workers’ BMI index was obtained by measuring their height (in metre) and weighting their body mass (in kg).

REBA assessment was done by analysing photos that were taken while workers performed their job. A total of 28 postures were analysed to assess the neck, trunk, and leg postures (A score) and arm and wrist postures (B score). The final score of body posture (A+B score) further is compared with REBA criteria for risk level determination. Furthermore, Nordic Musculoskeletal Questionnaire18 was used to investigate the workers’ MSS experience in nine body regions: neck, shoulder, upper back, elbow, lower back, wrist, buttock, knee, and ankle.

Result

SME 1 has two workshops, one for producing stuff made of steel, such as trellis, flowerpot, and pet cage. In the time of the observation was conducted, workers in SME 1 was producing trellis, flowerpot made of metal, and producing metal seat using pound machine. Producing trellis and flowerpot involves tasks such as lifting, cutting and smoothing using grinder, bending, welding, and cleaning product.

There were three jobs that were observed in SME 2, i.e. producing pole trash can, producing bowls using a lathe machine, and moulding metal seat using pound machine. Pole trash can production involves tasks such as cutting, and smoothing using a grinder, welding, and hollowing out the metal using drilling.

Descriptive sample

The descriptive sample is presented in Table 1. Most of the respondents were smokers (85%) with an average age of 36.8 years and an average BMI of 22.8kg/m2 (normal). The average work period of the workers was 0.8 years (9 months and 6 weeks).

Table 1.

Descriptive sample.

Characteristic  N 
Age
<30 years old  30 
≥30 years old  14  70 
Body mass index
Thin  10 
Normal  12  60 
Body fat  30 
Work period
<4 years  16  80 
≥4 years  20 
Smoking status
Never smoked  10 
Former smoker 
Current smoker  17  85 
Source: Primary Data (2019).
Prevalence of MSSs for each body region in relation to the individual risk factors

The prevalence of MSSs during the last 12 months is presented in Table 2. About 95% of the respondents reported MSSs in any of the nine body regions. MSSs were most frequent in the lower back (65%), wrists (45%), shoulders (35%) and ankles (35%). The lowest frequency of MSSs was in the upper back (10%) and elbows (10%).

Table 2.

Prevalence of MSSs.

Body Regions  N 
Neck  25 
Shoulder  35 
Upper back  10 
Elbow  10 
Lower back  13  65 
Wrist  45 
Buttock  15 
Knee  20 
Ankle  35 
Any MSS  19  95 
Source: Primary Data (2019).

MSSs in the four most frequent body regions were more prevalent among smokers, workers aged over 30 years, those with normal BMI, and those who had worked for less than 4 years. In addition, MSSs in the ankle region were reported to have the same prevalence for workers with a normal BMI and body fat percentage.

Level of physical risk factors

The levels of physical risk factors are presented in Table 3. The REBA scores were determined by analysing the risks of various postures, which were rated from low to very high. The physical risk factors were predominantly high risk (60.7%), followed by medium risk (25.0%), very high risk (10.7%), and low risk (3.6%). This report presented the result of posture analysis at each task from SME 1 and 2.

Table 3.

Level of physical risk factors.

Activities  Score A  Score B  REBA score 
Pressing using pound machine 
Wiping product (left body)  11 
Wiping product (left body) 
Wiping product (right body)  10 
Dismantling product 
Lowering product 
Lifting product to be soaked using pulley 
Lifting product to be soaked using pulley (left body) 
Lifting product to be soaked using pulley (left body) 
Lifting product to be washed 
Washing product (right body) 
Washing product (left body)  10  10 
Hanging product 
Stringing product 
Stringing product (left body) 
Stringing product (right body)  10 
Stringing product (left body) 
Stringing product (right body) 
Stringing product  10  10 
Hanging product in painting area 
Lifting product which have been painted  10  10 
Hanging product in oven  10 
Lifting materials  11 
Using drilling machine (right body)  12 
Using drilling machine (left body)  10 
Using lathe machine (left body) 
Using lathe machine (right body) 
Using pond machine 
Source: Primary Data (2019).

The activities from SME 1 were pressing using pound machine, wiping product, dismantling product, lowering product, lifting product, washing product, hanging product, stringing product. The activities from SME 2 were lifting, using drilling machine, using lathe machine, and using pound machine.

Higher risk in most of lifting activities was dominated by high point on upper arm posture (i.e. lowering, lifting using pulley, and hanging) and trunk posture (i.e. dismantling and manual lifting). In lowering and stringing activities both upper arm and trunk posture had higher points.

Using the pound machine in SME 1 was dominated by higher point on upper arm posture, while in SME 2, it was dominated by higher point on the trunk. Cleaning activities, using drilling machines and lathe machines were dominated by higher points on upper arm posture.

Most of the activities which were done in standing and squatting position were dominated by high point on upper arm. The difference between those two positions was affected by the material position that was handled, especially for lifting activities. Material which is on the floor tends to affect trunk posture to be on higher position.

DiscussionLifting

Lifting using a motorised pulley helps workers to decrease the level of risk. In lifting activities involving the hanging rail, upper arm flexion is caused by the hanging rail height, which exceeds the elbow level. In other cases, upper arm flexion is caused by the position of the products that are placed on the floor, which causes the workers’ trunk to bend. In other studies, lifting from low positions was found to put more pressure on the L5/S1 spine, whereas lifting from high positions put more pressure on the shoulders.19 Moreover, the frequency of lifting is associated with an increase in shoulder pain intensity.20 Therefore, working the height for lifting activities is suggested to be at or below the elbow height.21

Using the pound machine

The workers’ posture while using one of the types of pound machines was categorised as high risk, and the posture while using the other machine was categorised as medium risk. This varying categorisation was due to the machine difference, as one uses a handle and the other uses a pedal. The pound machine that uses a handle causes worker to grab the handle, which is higher than the workers’ shoulder height. Conversely, the machine that uses a pedal has no such requirement and provides enough legroom, which allows workers to get as close as possible to the lower arm reach. These differences indicate that the pound machine that uses a pedal is more recommended to be used. It showed that workload reduction could be achieved by adjusting the working height according to workers’ arm level and inclination trunk.22

Cleaning products

Wiping activities are categorised as a high- to a very high-risk job because some workers use a stool and others do not. Washing activities are done in a standing position. They are generally a low-risk level job, but they are a medium risk for the right side of the body and a high risk for the left side of the body. The differences in the level of risk are caused by some workers not using a stool. Wiping and washing activities have the same tendency in the upper arms because workers usually position their hands on the product being wiped or washed. This finding is consistent with those of other studies that indicated standing and sitting postures to cause less discomfort.23

Using the drilling and lathe machines

Activities using drilling and lathe machines are categorised as medium to very high risk, and largely influenced by awkward trunk and upper arm postures. Based on observation, using a drilling machine in a standing position required workers to bend their bodies. In addition, workers had to use the handler aside from the drilling machine, which affects the workers’ arm posture. Unlike the activities using the previous machines, the activities using lathe machine are categorised as medium risk. The machines tended to be unsafe because of the metal bar that directly contacts the rotating part of the machine.

Individual factors

Most MSSs were found in the lower back (65%), wrist (45%), shoulder (35%), and ankle (35%) regions. The MSSs in these body regions were common among workers aged 30 years and over and who were smokers. This finding is consistent with previous studies that indicated the prevalence to be higher among smokers13 and workers over 30 years old. Specifically, old age may decrease workers’ muscle strength, which leads to an increase in MSSs, and age has also been found to be a confounding factor for the work period.24,25 The high prevalence could be attributed to how the activities were performed.

In addition, the MSSs in these four body regions were more common among workers with normal BMI and who had worked for less than four years. Conversely, previous studies showed that obese workers10 and workers that have worked for more than four years24 had a higher prevalence of MSSs. These differences may be due to the majority of the respondents in this study having a normal BMI and having worked for less than four years.

Conclusion

Physical factors likely contributed more to the MSSs in the affected body regions than individual factors. However, the causal relationship was determined. The use of tools in some activities, such as lifting, decreased the level of risk. The position of the workers’ body towards the machines or tools, such as the reach of the lower arm and the working height, should be considered.

Conflicts of interest

The authors declare no conflict of interest.

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