Table 2.

Standardized total, direct, and indirect effects of sleep quality, insomnia, and depression on quality of life (physical health domain).

QOL1	Total β	p-value	Indirect β	p-value	Direct β	p-value
PSQI	−0.28	<0.001	−0.07 (23.1%)	<0.001	−0.22 (76.9%)	<0.001
Insomnia	−0.30	<0.001	−0.11 (36.9%)	<0.001	−0.19 (63.1%)	<0.001
Depression	−0.31	<0.001			−0.31 (100.0%)	<0.001

QOL 1, Quality of life (Physical health domain); PSQI, Pittsburgh Sleep Quality Index. The percentage values represent percentage of the direct effects compared to indirect effects.