Table 4.

Comparison between school grade levels and psychological symptoms.

Variables		Primary school students	Middle school students	High school students
Depressive symptoms	OR	1	1.019	1.181
	95% CI	-	0.954–1.088	1.085–1.286
	P	-	0.58	<0.001
Anxious symptoms	OR	1	1.058	1.231
	95% CI	-	0.988–1.133	1.126–1.347
	P	-	0.105	<0.001
Compulsive symptoms	OR	1	1.003	0.995
	95% CI	-	0.939–1.072	0.913–1.083
	P	-	0.922	0.905
Inattention	OR	1	0.976	1.239
	95% CI	-	0.913–1.044	1.139–1.349
	P	-	0.477	<0.001
Sleep problems	OR	1	0.942	1.136
	95% CI	-	0.879–1.008	1.042–1.238
	P	-	0.085	<0.001