TABLE 2.

Linear and logistic regressions to explore the difference in sleep quality between nurses working consecutive night shifts and nurses having worked past night shifts.

Past vs. consecutive	PSQI global score (raw)		Poor sleep quality (PSQI > 5)
	Coefficient (95% CI)	p	OR (95% CI)	p
Model 1	−0.35 (−0.79, 0.08)	0.11	0.77 (0.54, 1.10)	0.15
Model 2	−0.91 (−1.43, −0.40)	0.001	0.52 (0.33, 0.81)	0.004
Model 3	−0.82 (−1.27, −0.38)	<0.001	0.49 (0.29, 0.80)	0.005
Model 4	−0.77 (−1.31, −0.23)	0.005	0.59 (0.38, 0.92)	0.02

PSQI, Pittsburgh Sleep Quality Index; CI, confidence interval; OR, odds ratio. Model 1, no adjustment; Model 2, adjusted for religion, marital status, living condition, income, duration of nursing work, alcohol consumption, hypertension, and hyperlipidemia; Model 3, further adjusted for irritability, depression, and anxiety score and perceived stress score based on model 2; Model 4, adjusted for propensity score calculated based on covariates in model 3.