Table 3.

Scores of psychological problems of adolescents in different IA groups.

Variables	NIU group (M ± SD)	PIU group (M ± SD)	p
Total
Depression	5.85 ± 7.78	12.37 ± 10.09	<0.001
Anxiety	5.97 ± 7.30	10.91 ± 9.13	<0.001
Stress	7.72 ± 8.21	14.31 ± 9.90	<0.001
Boys
Depression	5.70 ± 7.85	11.32 ± 9.46	<0.001
Anxiety	5.71 ± 7.42	9.85 ± 8.71	<0.001
Stress	7.22 ± 8.18	12.96 ± 9.43	<0.001
Girls
Depression	5.99 ± 7.72	13.55 ± 10.63	<0.001
Anxiety	6.21 ± 7.19	12.10 ± 9.44	<0.001
Stress	8.18 ± 8.21	15.83 ± 10.20	<0.001
Grade 7–9
Depression	5.49 ± 7.66	12.04 ± 10.11	<0.001
Anxiety	5.61 ± 7.18	10.38 ± 9.15	<0.001
Stress	7.29 ± 8.10	13.89 ± 9.87	<0.001
Grade 10–12
Depression	6.69 ± 7.80	13.15 ± 10.00	<0.001
Anxiety	6.83 ± 7.52	12.16 ± 8.96	<0.001
Stress	8.75 ± 8.37	15.30 ± 9.90	<0.001

NIU, Normal Internet use (YDQ score ≤ 4 points); PIU, Problematic Internet use (YDQ score ≥ 5 points).