Table 4.

Multi-group structural equation model fit index.

Model		χ2/df	RMSEA	SRMR	CFI	TLI	GFI	ΔCFI
Gender	restricted model	2.778	0.050	0.032	0.971	0.960	0.944	0.006
	free model	2.801	0.052	0.041	0.965	0.957	0.941
Sports grade	restricted model	2.692	0.063	0.034	0.967	0.945	0.953	0.005
	free model	2.947	0.064	0.040	0.962	0.940	0.956
Introducing the control variables into model		2.684	0.058	0.039	0.935	0.951	0.947