TABLE 2.

OLS regression analysis of the effect of demographic variables on sleep quality.

Model	Variables	B	β	t	p	R 2	Adjusted R2	F	p
PSQI						0.171	0.092	2.163	0.039
	Gender	–2.881	–0.317	−2.181*	0.032
	Age	0.448	1.187	2.501*	0.14
	Working years	–0.434	–1.139	−2.670**	0.009
	Marital status	–0.512	–0.079	–0.409	0.684
	Number of children	1.483	0.290	1.649	0.103
	Living situation	0.175	0.033	0.232	0.817
	Job	–3.959	–0.611	−3.563***	< 0.001
	Educational status	0.081	0.017	0.141	0.888

PSQI, Pittsburgh Sleep Quality Index.

*p < 0.05; **p < 0.01; ***p < 0.001.

The bold values means there are significant differences.