Table 3.

Relationships of AST and control variables with no depressive symptom.

Variables		No Depressive Symptom
		Adjusted OR	95% CI
Sex
	Boy	ref
	Girl	0.93	0.82	1.06
Age group
	7th	ref
	8th	1.00	0.87	1.16
	9th	0.92	0.78	1.08
Weight Status
	Non-obesity	ref
	Obesity	0.97	0.78	1.20
ST
	Excessive	ref
	Limited	1.15	0.99	1.34
Smoking status
	never	ref
	rarely	0.74	0.53	1.05
	sometimes	0.54	0.33	0.87
	most	0.55	0.23	1.35
	always	0.46	0.25	0.86
Drinking
	never	ref
	rarely	0.69	0.57	0.84
	sometimes	0.43	0.29	0.65
	most	0.50	0.20	1.23
	always	0.52	0.23	1.16
Friends
	0	ref
	1	1.54	1.17	2.02
	2	1.61	1.25	2.07
	3 or more	1.89	1.51	2.36
AST
	Passive	ref
	Active	1.20	1.06	1.36

ST: sedentary time; excessive: more than 2 hours of ST per day; limited: no more than 2 hours of ST per day; ref: reference group; OR: odds ratio; CI: confidence interval.