Maartje Boer

SMU AND WELLBEING ACROSS COUNTRIES 115 4 Intense Social Media Use and Wellbeing Figure 4.2 illustrates the associations between intense SMU and wellbeing outcomes according to the models with the best model fit. Estimates and further details of these models can be found in the Appendix (Table A4.1). Figure 4.2 Associations Between Intense SMU and Wellbeing Notes. SMU = social media use; B = unstandardized coefficient; M = mean. Left (A): dots denote average estimated associations between intense SMU and the wellbeing outcomes, horizontal lines through the dots denote their 95% prediction interval. Right (B): diagonal lines represent the estimated associations of intense SMU and the wellbeing outcomes by the country-level prevalence of intense SMU. Cross-level interactions were reported when they improved model fit and when they were significant at p < 0.05. All estimates were derived frommultilevel regression models (Appendix, Table A4.1). * p < 0.05, ** p < 0.01, *** p < 0.001. Mental Wellbeing Figure 4.2A shows that, on average, intense SMU and life satisfaction were not related ( B = 0.023, p = 0.123). However, at country-level, this association varied from negative to positive (95% PI = -0.172 to 0.220). In countries with a higher than average prevalence of intense SMU, intense users reported