Table 2.

Testing ADL as a mediator in the relationship between poor sleep quality and psychological distress

Model pathways	R2	B	SE	t	95%CI
Sleep quality→Psychological distress	0.213	2.499	0.099	25.345	(2.306, 2.692)
Sleep quality→ADL	0.115	−1.270	0.093	−13.610	(− 1.453, − 1.087)
Sleep quality→Psychological distress	0.345	1.950	0.093	21.074	(1.768, 2.131)
ADL → Psychological distress		−0.433	0.017	−25.542	(−0.466, − 0.400)

Note: Covariates used to control included sex, residence, age, education level, monthly income, marital status, smoking status, drinking status, and chronic conditions. B regression coefficient, SE standard error