Table 2.

Logistic regression analysis of the association between internet addiction, physical activity and anxiety, depression, ADC

	model1	model2	model3
	OR (95% CI)	OR (95% CI)	OR (95% CI)
Anxiety
Internet addiction (IA)
No	1 (ref)	1 (ref)	1 (ref)
Yes	1.80***(1.68, 1.91)	1.79***(1.68, 1.91)	1.77***(1.66, 1.88)
Physical activity(PA)
MVPA	1 (ref)	1 (ref)	1 (ref)
IPA	1.17***(1.10, 1.24)	1.17***(1.10, 1.24)	1.15***(1.08, 1.22)
Depression
Internet addiction (IA)
No	1 (ref)	1 (ref)	1 (ref)
Yes	1.99***(1.88, 2.11)	1.99***(1.87, 2.11)	1.95***(1.84, 2.07)
Physical activity(PA)
MVPA	1 (ref)	1 (ref)	1 (ref)
IPA	1.27***(1.19, 1.34)	1.26***(1.18, 1.34)	1.24***(1.16, 1.32)
anxiety-depression comorbidity(ADC)
Internet addiction (IA)
No	1 (ref)	1 (ref)	1 (ref)
Yes	2.12***(2.00, 2.25)	2.11***(1.99, 2.25)	2.09***(1.96, 2.21)
Physical activity(PA)
MVPA	1 (ref)	1 (ref)	1 (ref)
IPA	1.23***(1.14, 1.32)	1.23***(1.14, 1.32)	1.20***(1.11, 1.29)

model1 adjusted for gender, age group, education level, residence, boarding status. model2: further adjusted for obesity, based on model (1) model3, included IAD and PA simultaneously, based on model (2) 

***P<0.001