Table 3.

Logistic regression of self-reported predictors for adaptive sleep patterns (i.e., switch sleeper, incomplete switch sleeper) on off-shift days among night-shift hospital-based nurses: backward approach.

Steps	Characteristic	Odds ratio	95%CI
Step 1	Age	0.97	0.92–1.03
	Chronotype	1.34	1.01–1.79
	Sleep disturbance	0.88	0.77–0.99
	Night-shift experience (Ref: <6 years)	0.76	0.23–2.56
	Cardiovascular problems	0.90	0.78–1.03
	Digestive difficulties	0.96	0.87–1.05
	Anti-depressant medication (Ref: never)	0.80	0.30–2.13
	General mental health questionnaire	1.05	0.94–1.17
	Cognitive anxiety	0.99	0.89–1.09
Final step	Chronotype	1.41	1.08–1.84
	Sleep disturbance	0.90	0.80–0.99
	Cardiovascular problems	0.87	0.77–0.98

Final model: χ² = 21.0, df = 3, p < 0.001.