Table 5.

Multigroup configural invariance analysis of PSQI-5 model for the validation set.

Characteristics	Δχ2	df	P-value	ΔCFI	ΔNFI	ΔRMSEA
Gender	0.528	4	0.971	0.023	0.013	0.003
Education	5.004	4	0.287	0.023	0.021	0.004
Residence	1.726	4	0.786	0.045	0.030	0.006
Marriage status	5.576	4	0.212	0.033	0.046	0.004
Living status	3.766	4	0.439	0.051	0.013	0.003

CFI, comparative fit index; NFI, normed fit index; RMSEA, root mean square error of approximation, PSQI, Pittsburgh sleep quality index.