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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Analizar los factores que determinan la adquisici&#243;n y posterior consolidaci&#243;n del consumo de tabaco en los j&#243;venes adolescentes&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todo</span><p class="elsevierStyleSimplePara elsevierViewall">Estudio longitudinal de 3 a&#241;os de duraci&#243;n &#40;2000-2002&#41; sobre j&#243;venes estudiantes de ense&#241;anza obligatoria&#44; con una edad al inicio del estudio de 13-14 a&#241;os&#46; Los datos fueron recogidos mediante encuesta individual&#44; cuyo &#225;mbito de estudio era la isla de Gran Canaria&#44; con una muestra final de 745 individuos&#46; Se estimaron modelos de elecci&#243;n binaria condicional de efectos fijos para datos longitudinales&#44; para determinar la probabilidad de probar por primera vez el tabaco &#40;&#171;modelo de inicio&#187;&#41;&#44; as&#237; como sobre la probabilidad de ser fumador occasional o habitual &#40;&#171;modelo de experimentaci&#243;n&#187;&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">En el &#250;ltimo a&#241;o&#44; el 57&#37; de los adolescents encuestados ha tenido contacto con el tabaco alguna vez&#44; un 25&#37; m&#225;s que en el primer a&#241;o&#44; algunos de ellos &#40;el 9&#37;&#41; de forma diaria&#46; En el &#171;modelo de inicio&#187; los determinantes del consumo de tabaco son el inter&#233;s por el colegio &#40;odds ratio &#91;OR&#93;<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;27&#59; intervalo de confianza &#91;IC&#93; del 95&#37;&#44; 0&#44;08-0&#44;87&#44; y OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#44;14&#59; IC del 95&#37;&#44; 0&#44;03-0&#44;58 para los que manifestaron bastante y mucho inter&#233;s por el colegio&#44; respectivamente&#41;&#44; el consumo de tabaco por parte del mejor amigo &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>7&#44;44&#59; IC del 95&#37;&#44; 2&#44;59-21&#44;4&#41;&#44; el consumo de alcohol &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#44;82&#59; IC del 95&#37;&#44; 4&#44;96-28&#44;2&#44; y OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>15&#44;42&#59; IC del 95&#37;&#44; 4&#44;68-50&#44;7 para los que beben alcohol de manera ocasional o frecuente&#44; respectivamente&#41;&#44; y el dinero disponible &#40;euros semanales&#41; &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1&#44;13&#59; IC del 95&#37;&#44; 1&#44;07-1&#44;19&#41;&#46; Para el &#171;modelo de experimentaci&#243;n&#187;&#44; el consumo de tabaco por parte del mejor amigo &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>7&#44;01&#59; IC del 95&#37;&#44; 2&#44;96-16&#44;5&#41;&#44; el consumo de alcohol &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#44;71&#59; IC del 95&#37;&#44; 1&#44;98-16&#44;4&#44; y OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#44;22&#59; IC del 95&#37;&#44; 1&#44;56-17&#44;5 para los que beben alcohol de manera ocasional o frecuente&#44; respectivamente&#41; y los a&#241;os que lleva como fumador &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1&#44;44&#59; IC del 95&#37;&#44; 1&#44;11-&#44;86&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">El estudio destaca&#44; principalmente&#44; los efectos del grupo de amigos&#44; el consumo de bebidas alcoh&#243;licas y el poco inter&#233;s por los estudios como factores asociados al consumo de tabaco&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">To analyse the determining of the acquisition and later consolidation of the tobacco consumption in young adolescents&#46;</p> <span class="elsevierStyleSectionTitle">Material and method</span><p class="elsevierStyleSimplePara elsevierViewall">Longitudinal study of three years of duration &#40;2000-2002&#41;&#46; Subjects were students of secondary education between 13 and 14 years old at the beginning of the study&#46; The research was performed in Gran Canaria Island with a final sample of 745 subjects&#46; Models of conditional binary election were considered for longitudinal data where the dependent variable reflects decisions of the adolescents through time&#44; with regard to the probability of beginning to smoke&#44; &#171;beginning model&#187;&#44; and the probability of being occasional or habitual smoker&#44; &#171;experimentation model&#187;&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">In the last year&#44; 57&#37; of the young teenagers surveyed use tobacco&#44; a 25&#37; more than in the first year&#44; some of them&#44; 9&#37; on a daily basis&#46; In the &#171;beginning model&#187; the determining of the tobacco consumption are interest in studies &#40;odds ratio &#91;OR&#93;<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;27&#59; 95&#37; confidence interval &#40;CI&#41;&#44; 0&#46;08-0&#46;87 and OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;14&#59; 95&#37; CI&#44; 0&#46;03-0&#46;58 for the students having enough and much interest in studies&#44; respectively&#41;&#44; to have a smoker as the best friend &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>7&#46;44&#59; 95&#37; CI&#44; 2&#46;59-21&#46;4&#41;&#44; the alcohol consumption &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#46;82&#59; 95&#37; CI&#44; 4&#46;96-28&#46;2 and OR&#61;15&#46;42&#59; 95&#37; CI&#44; 4&#46;68-50&#46;7 for youngs who drink alcohol occasionally or frequently&#41; and having more pocket money &#40;euros per week&#41; &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>13&#59; 95&#37; CI&#44; 1&#46;07-1&#46;19&#41;&#46; For the &#171;experimentation model&#187;&#44; to have a smoker as the best friend &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>7&#46;01&#59; 95&#37; CI&#44; 2&#46;96-16&#46;5&#41;&#44; the alcohol consumption &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#46;71&#59; 95&#37; CI&#44; 1&#46;98-16&#46;4 and OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#46;22&#59; 95&#37; CI&#44; the 1&#46;56-17&#46;5 for youngs who drink alcohol occasionally or frequently&#41; and the number of years since the student started smoking &#40;OR<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1&#46;44&#59; 95&#37; IC&#44; 1&#46;11-1&#46;86&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">Our study emphasizes&#44; peer group effect&#44; drinking alcoholic beverages and lack of interest in studies as factors associated to the tobacco consumption&#46;</p>"
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