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The aim of this study was to quantify the adolescents’ sedentary use of screen time and find out if there were significant differences depending on the sociodemographic variables sex, school grade and socioeconomic status. Participants comprised a representative sample of Spanish adolescents (n = 2983) aged 12 to 18 years old. Two questionnaires were administered: 1) a self-report questionnaire (ASAQ) to know the daily mean time adolescents engaged in sedentary use of screen media, in particular in TV, DVD player, computer and videogames; and 2) the FAS II questionnaire, to know their socioeconomic status. A 2x3x2 MANOVA was carried out, among other analyses, to determine if there were significant differences between the independent variables of the study. Spanish adolescents spent 3 hours on average daily engaging in screen media devices, being only the 27.2% the adolescents who met the current media recommendations (<2 hours/day). Results show that, in general, boys spent more time than girls on screen media use, there is a high peak of use at the middle of adolescence and there are not significant differences among the different socioeconomic levels. In this sense, we recommend starting the design of strategies in order to limit the sedentary screen time in adolescents, focusing mainly on boys and in those who are finishing Secondary School studies.

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El uso sedentario de medios tecnológicos de pantalla: perfil sociodemográfico de los adolescentes españoles (Sedentary use of screen-media: Sociodemographic profile of Spanish adolescents)