Table 5.

Mediation regression results.

Variable	Psychological health		Social support		Exercise behavior		Psychological health
	β	t	β	t	β	t	β	t
Gender	0.048	1.324	0.892	2.983	0.031	0.882	0.045	0.732
Grade	0.002	0.344	0.025	0.126	−0.038	−1.376	0.045	0.666
Origin	−0.071	−1.174	0.028	0.392	−0.028	0.532	−0.056	−1.012
Only child	--0.034	−0.468	0.048	1.356	0.003	0.021	−0.039	−1.210
Physical education	0.622***	17.84	0.523***	19.43	0.277***	7.886	0.311***	6.234
Social support					0.578***	16.388	0.473***	9.032
Exercise behavior							0.357***	7.893
R2	0.441		0.278		0.661		0.512
△R2	0.403		0.298		0.601		0.588
F	40.235***		21.345***		85.893***		76.982***

“***” indicates p < 0.01.