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BackgroundA positive association between time spent on sedentary screen-based activities and physical complaints has been reported, but the cumulative association between different types of screen-based activities and physical complaints has not been examined thoroughly.MethodsThe cross-sectional association between screen-based activity and physical complaints (backache and headache) among students was examined in a sample of 31022 adolescents from Denmark, Sweden, Norway, Finland, Iceland and Greenland, as part of the Health behaviour in school-aged children 2005/06 (HBSC) study. Daily hours spent on screen-based activities and levels of physical complaints were assessed using self-reports.ResultsLogistic regression analysis indicated that computer use, computer gaming and TV viewing contributed uniquely to prediction of weekly backache and headache. The magnitude of associations was consistent across types of screen based activities, and across gender.ConclusionThe observed associations indicate that time spent on screen-based activity is a contributing factor to physical complaints among young people, and that effects accumulate across different types of screen-based activities.

This paper examines differences in life satisfaction among children in different family structures in 36 western, industrialised countries (n = 184 496). Children living with both biological parents reported higher levels of life satisfaction than children living with a single parent or parent-step-parent. Children in joint physical custody reported significantly higher levels of life satisfaction than their counterparts in other types of non-intact families. Controlling perceived family affluence, the difference between joint physical custody families and single mother or mother-stepfather families became non-significant. Difficulties in communicating with parents were strongly associated with less life satisfaction but did not mediate the relation between family structure and life satisfaction. Children in the Nordic countries characterised by strong welfare systems reported significantly higher levels of life satisfaction in all living arrangements except in single father households. Differences in economic inequality between countries moderated the association between certain family structures, perceived family affluence and life satisfaction. Ó