Maartje Boer

THE COURSE OF PROBLEMATIC SMU 223 7 Table A7.1 Difference in Latent Class Growth Model Estimates, by Sample (n = 1,419) Problematic SMU SMU frequency Sample 1 Estimate SE Estimate SE Intercept -0.204** 0.067 3.992*** 0.067 Slope -0.031 0.033 0.149*** 0.026 Variance intercept 0.729*** 0.068 1.421*** 0.090 Variance slope 0.029* 0.015 0.013 0.015 Sample 2 Estimate SE Estimate SE Intercept -0.093 0.061 4.081*** 0.065 Slope 0.027 0.033 0.169*** 0.033 Variance intercept 0.780*** 0.071 1.378*** 0.096 Variance slope 0.014 0.022 0.014 0.023 Differences between samples 1 and 2 Estimate z Estimate z Intercept -0.111 -1.222 -0.090 -0.968 Slope -0.058 -1.249 -0.020 -0.487 Variance intercept -0.051 -0.517 0.043 0.340 Variance slope 0.015 0.571 -0.001 -0.038 Notes. SMU = social media use; SE = standard error; z = z-score. Sample 1 n = 799 (56.3%), sample 2 n = 620 (43.7%). Estimates for Problematic SMU were based on Poisson regression. *** p < 0.001, ** p < 0.01, * p < 0.05.