Characteristics of the total study population (n = 3067) and by amount of time watching TV (TV≤2 hrs/day versus >2 hrs/day) and by amount of time using computers or game consoles (≤30 min/day versus >30 min/day).

The means and frequencies presented are means and frequencies of the original dataset. Missing values were 16 (0.5%) for age of the parent, 15 (0.5%) for sex of the parent, 84 (2.7%) for educational level, 17 (0.6%) for family structure, 264 (11.9%) for employment status of the parent, 239 (7.8%) for age of the child, 4 (0.1%) for sex of the child, and 182 (5.9%) for ethnic background of the child.aT-tests were used for continuous variables and Chi-square statistics were used for categorical variables to examine differences between the subgroups of children that watch TV≤2 hrs/day versus watch TV>2 hrs/day and between the subgroups of children that use computers or game consoles ≤30 min/day versus >30 min/day on computers or game consoles; the p-values are the pooled results of analysis of the five imputed datasets.bLow education = no education, primary education, lower secondary vocational education, and preparatory secondary vocational education; mid education = senior secondary vocational education, senior secondary education, and pre-university education; high education = higher professional education, academic higher education (university education).