Table 3.

Associations of perceived stress score (per 1-point increment) with loneliness and depressive symptoms stratified by poor global sleep quality (N = 734). ^a

Outcomes	Poor global sleep quality	β/OR (95% CI)	P value for interaction b
Loneliness score	No (N = 436)	0.07 (0.05, 0.09)	0.721
	Ye (N = 298)	0.06 (0.03, 0.08)
Depression score	No (N = 436)	0.33 (0.28, 0.39)	0.002
	Yes (N = 298)	0.45 (0.38, 0.52)
Loneliness c	No (N = 436)	1.23 (1.14, 1.33)	0.156
	Yes (N = 298)	1.11 (1.03, 1.19)
Depressive symptoms d	No (N = 436)	1.37 (1.20, 1.55)	0.344
	Yes (N = 298)	1.40 (1.26, 1.55)

OR, odds ratio; CI, confidence interval

^a The models were adjusted for age, sex, marital status, educational level, occupational status, family income per month, body mass index, physical activity, drinking status, smoking status, psychological disease history, and self-rated health status

^bP value for interaction indicated the modifying effect of poor global sleep quality on the associations of perceived stress with loneliness and depressive symptoms among total participants

^c Participants were considered as experiencing loneliness if they had a loneliness score ≥ 6

^d Participants were considered as having depressive symptoms if they had a depression score ≥ 10