Table 2.

Adjusted odds ratios for sleep quality for the different tobacco smoke exposure groups

Sleep Variable	Non-smoking (N=307)	Passive smoking (N=562) OR ( 95% CI)	Active smoking (N=918) OR ( 95% CI)
Subjective sleep quality ≥2	1 (reference)	1.30 (0.82–2.04)	1.40 (0.89–2.14)
Sleep latency ≥2	1 (reference)	1.45 (1.00–2.11)	1.84 (1.28–2.64)
Sleep duration ≥2	1 (reference)	1.94 (1.01–3.71)	2.72 (1.45–5.09)
Habitual sleep efficiency ≥2	1 (reference)	1.52 (0.83–2.78)	1.34 (0.74–2.43)
Sleep disturbances ≥2	1 (reference)	1.20 (0.74–1.95)	1.03 (0.64–1.66)
Use of sleeping medication ≥2	1 (reference)	2.79 (0.29–26.67)	3.13 (0.37–26.77)
Daytime dysfunction ≥2	1 (reference)	1.44 (1.02–2.03)	1.54 (1.10–2.17)
PSQI total score >5	1 (reference)	1.34 (1.00–1.79)	1.41 (1.05–1.88)

Model was adjusted for age, marital status, educational level, BMI, drinking status, physical exercise, siesta, shift work, working hours, working days, mental health, and family function. OR: odds ratio, CI: confidence interval.