Table 1.

Differences in the prevalence of health outcomes across characteristics

	Overall, N (%)	Anxiety, N (%)	P	Depression, N (%)	P	ADC, N (%)	P
Age (years), mean(SD)	14.9(1.7)	15.3(1.8)	< 0.001	15.3(1.7)	< 0.001	15.3(1.7)	< 0.001
11–14	10,092 (48.8)	1469 (14.6)	< 0.001	1156 (11.5)	< 0.001	839 (8.3)	< 0.001
15–18	10,600 (51.2)	2570 (24.2)		1949 (18.4)		1450 (13.7)
Gender
Boy	10,497 (50.7)	1721 (16.4)	< 0.001	1352 (12.9)	< 0.001	945 (9.0)	< 0.001
Girl	10,195 (49.3)	2318 (22.7)		1753 (17.2)		1344 (13.2)
Residence
Urban	11,622 (56.2)	2320 (20.0)	0.077	1861 (16.0)	< 0.001	1328 (11.4)	0.059
Rural	9070 (43.8)	1719 (19.0)		1244 (13.7)		961 (10.6)
Boarding status
Yes	1677 (8.1)	489 (29.2)	< 0.001	333 (19.9)	< 0.001	256 (15.3)	< 0.001
No	19,015 (91.9)	3550 (18.7)		2772 (14.6)		2033 (10.7)
Education level
Middle school	10,092 (48.8)	1585 (14.9)	< 0.001	1239 (11.6)	< 0.001	907 (8.5)	< 0.001
High school	10,600 (51.2)	2454 (24.5)		1866 (18.6)		1382 (13.8)
Internet addiction(IA)
Yes	1722 (8.3)	560 (32.5)	< 0.001	475 (27.6)	< 0.001	375 (21.8)	< 0.001
No	18,970 (91.7)	3479 (18.3)		2630 (13.9)		1914 (10.1)
Physical activity(PA)
IPA	9673 (46.7)	1918 (17.4)	< 0.001	1422 (12.9)	< 0.001	1053 (9.6)	< 0.001
MVPA	11,019 (53.3)	2121 (21.9)		1683 (17.4)		1236 (12.8)
Obesity
Yes	4375 (21.1)	812 (18.6)	0.071	661 (15.1)	0.847	488 (11.2)	0.843
No	16,317 (78.9)	3227(39.8)		2444 (15.0)		1801 (11.0)

ADC anxiety-depression comorbidity, IPA insufficient physical activity, MVPA moderate-to-vigorous physical activity