TABLE A2.

Results multinomial regression, membership class 2 (n = 1419)

	Class 2: Persistently high problematic SMU, persistently average SMU frequency (ref. = class 4: persistently low problematic SMU, variably high SMU frequency)
	Model A			Model B			Model C			Model D			Model E (Figure 4)
	B	SE	OR	B	SE	OR	B	SE	OR	B	SE	OR	B	SE	OR
Controls
Girl (ref. = boy)	−0.916***	.260	0.400	−1.050***	.271	0.350	−0.683*	.273	0.505	−0.393	.286	0.676	−0.500	.327	0.610
Pre‐vocational education (ref. = pre‐university)	0.447	.417	1.563	0.439	.438	1.552	0.432	.415	1.540	0.373	.476	1.457	0.294	.471	1.347
Intermediate education (ref. = pre‐university)	0.388	.424	1.474	0.327	.447	1.387	0.296	.431	1.345	0.419	.488	1.524	0.190	.474	1.210
Immigrant background (ref. = non‐immigrant)	0.608*	.272	1.837	0.682*	.287	1.979	0.701*	.287	2.017	0.473	.323	1.611	0.520	.333	1.691
Subjective well‐being
Life satisfaction				−1.124**	.327	0.327							−0.793*	.321	0.454
Self‐esteem				−0.646	.350	0.526							0.309	.386	1.372
Self‐control
Attention deficit							1.082**	.354	2.981				0.541	.429	1.752
Impulsivity							0.264	.367	1.308				−0.226	.424	0.805
Social competencies
Perceived friendship competence										−2.885***	.414	0.057	−2.634***	.430	0.073

Abbreviations: B, logit coefficient; OR, odds ratio; Ref., reference category; SE, standard error; SMU, social media use.

^* p < .05

^** p < .01

^*** p < .001.