Table 3.

Differences in stress, sleep quality, social anxiety, and rumination among college students in different grades

Dependent variable		Independent variable	SS	DF	MS	F	Significance
Stress	intergroup	Grade	2026.04	5	405.208	1.468	0.197
	within a group		454515.732	1647	275.966
Sleep Quality	intergroup		5.765	5	1.153	1.155	0.329
	within a group		1643.683	1647
Social anxiety	intergroup		321.386	5	64.277	3.644	0.003
	within a group		29050.496	1647
Rumination	intergroup		2637.482	5	527.496	3.074	0.009
	within a group		282613.518	1647

N = 1653. Genders and Household registration are dummy variables, Male = 0, Female = 1, Rural = 0, Urban = 1

*p < 0.05, **p < 0.01, ***p < 0.001