Table 6.

Hierarchical multiple regressions for PSQI sleep quality.

	Variable	T1		T2
		B	β	B	β
Model 1	Constant	9.036***		11.512***
	Age	−0.033*	−0.101	−0.081**	−0.237
	Sex	0.031	0.003	1.194	0.131
Model 2	Constant	−1.703		2.488
	Age	0.011	0.034	−0.038	−0.111
	Sex	−0.328	−0.037	0.086	0.009
	Anxiety (revised)	0.151***	0.472	0.138***	0.423
	Loneliness	0.059***	0.182	0.056	0.174
	Self-isolation	0.246*	0.076	0.096	0.073
	Alcohol	−0.300**	−0.097	−0.266	−0.076
Model 3	Constant	−2.939**		1.436
	Age	−0.011	−0.033	−0.054*	−0.157
	Sex	0.100	0.011	−0.561	−0.062
	Anxiety (revised)	0.146***	0.454	0.139***	0.427
	Loneliness	0.047**	0.145	0.038	0.119
	Self-isolation	0.200	0.061	0.054	0.042
	Alcohol	−0.199	−0.064	−0.193	−0.055
	Disability	2.168***	0.224	2.136**	0.220
		Model 1	Model 2	Model 3
T1	R 2	0.010	0.384	0.422
	F	2.52	49.32***	49.41***
	ΔR 2	0.010	0.374	0.038
	ΔF	2.52	71.98***	31.14***
T2	R 2	0.051	0.381	0.414
	F	3.90*	14.58***	14.21***
	ΔR 2	0.051	0.331	0.033
	ΔF	3.90*	18.96***	7.82**

N_T1 = 481; N_T2 = 149. B = unstandardized regression coefficient; β = standardized coefficient; R² = coefficient of determination; ΔR² = adjusted R²; and ΔF = F change.

^*p < 0.05;

^**p < 0.01;

^***p < 0.001.