Maartje Boer

SMU AND WELLBEING ACROSS COUNTRIES 113 4 Table 4.1 Descriptive Statistics and Correlations Individual-level (n = 154,981) Mean / Proportion SD Min. Max. 1 2 3 4 5 6 7 8 1 Intense SMU 0.340 1 2 Problematic SMU 0.074 0.269*** 1 Mental wellbeing 3 Life satisfaction 7.639 1.846 0 10 -0.042*** -0.203*** 1 4 Psychological complaints 2.351 1.024 1.000 5.000 0.119*** 0.290*** -0.463*** 1 School wellbeing 5 School satisfaction 2.866 0.872 1 4 -0.082*** -0.198*** 0.295*** -0.273*** 1 6 Perceived school pressure 2.368 0.922 1 4 0.101*** 0.187*** -0.236*** 0.333*** -0.263*** 1 Social wellbeing 7 Family support 5.623 1.659 1.000 7.000 -0.010 -0.171*** 0.325*** -0.246*** 0.180*** -0.135*** 1 8 Friends support 5.305 1.766 1.000 7.000 0.117*** -0.068*** 0.174*** -0.123*** 0.141*** -0.075*** 0.443*** 1 Controls 9 Female 0.510 0.107*** 0.077*** -0.119*** 0.227*** 0.064*** 0.124*** -0.047*** 0.135*** 10 Family affluence 0.502 0.285 0.000 0.998 0.033*** -0.015* 0.132*** -0.038*** 0.025*** 0.008 0.066*** 0.060*** 11 Age 13.541 1.645 10.000 16.500 0.156*** 0.094*** -0.188*** 0.147*** -0.187*** 0.213*** -0.123*** -0.008 Country-level (n = 29) Mean / Proportion SD Min. Max. 12 13 14 15 12 Intense SMU prevalence 0.346 0.072 0.174 0.499 1 13 Problematic SMU prevalence 0.073 0.027 0.031 0.142 0.476*** 1 14 Costs mobile broadband 24.341 14.792 9.849 72.506 -0.024 0.139 1 15 Internet speed 15.725 3.718 7.900 23.500 -0.237 -0.181 -0.255 1 Notes. SMU = social media use; SD = standard deviation; Min. = minimum; Max. = maximum; Individual-level correlations were computed with a country cluster correction. * p < 0.05; ** p < 0.01; *** p < 0.001.