Table 3.

Regression results depicting associations between externalizing symptoms and predictors.

Predictor	b	b 95% CI [LL, UL]	t
Step 1
Mental Health Treatment	0.18**	[0.08, 0.28]	3.67**
Biological Sex	0.01	[-0.08, 0.11]	0.28
Mother's Education	-0.17**	[-0.26, -0.07]	-3.49**
Phone Type	0.01	[-0.08, 0.11]	0.26	R2 = .063**
				95% CI[.02,.10]
Step 2
Duration of Screen-time	0.18**	[0.08, 0.28]	3.61**
Number of Unlocks	-0.10	[-0.20, 0.01]	-1.77
Mental Health Treatment	0.17**	[0.08, 0.27]	3.62**
Biological Sex	0.01	[-0.09, 0.10]	0.09
Mother's Education	-0.15**	[-0.24, -0.06]	-3.18**
Phone Type	0.01	[-0.10, 0.11]	0.11
				R2 = .093**
				95% CI[.04,.14]
				ΔR2=.030**
				F(1,414) = 6.81

Note. b represents unstandardized regression weights. LL and UL indicate the lower and upper limits of a confidence interval, respectively.

* indicates p < .05. ** indicates p < .01.

Biological sex was coded in the analysis as: 0 – Female, 1 - Male; Current mental health treatment was coded as: 0 – Yes, 1 – No; Mother's education was coded as: 0 – Did not finish high-school, 1- Finished high-school, 2-Further education, 3 – University, 4 – I don't know, 5 – Prefer not to answer. Phone type was coded as: 0 - Android, 1 - iOS