Univariate correlates of total screen time (ST) (n = 5,844)a.

aMulti-level general linear model controlling for sex, age, and highest parental education, with school and ISCOLE site as a random effects; unstandardized beta coefficients and standard errors are presented.bISCOLE used a variety of measures to assess adiposity, all of which were significant in univariate analyses. Akaike information criterion, Bayesian information criterion, and level of significance were used to determine which measure of adiposity provided the closest fit for the data. Waist circumference alone provided the best fit.cWHO BMI z-score classification. PA: physical activity; SE: Standard error; TV: televisionUnivariate correlates of total screen time (ST) (n = 5,844)a.