Table 2.

Variables associated with quality of life.

	Multivariable
	OR (95% CI)	P
(1) Variables associated with the presence of sleep disorder
Age, years (continuous)	0.983 (0.976–0.990)	< 0.001
Current smoker (yes vs. no)	1.329 (1.164–1.519)	< 0.001
Amount of smoking, PY (continuous)	1.009 (1.004–1.014)	0.001
Marital status, n (%)
Yes	Reference
Others	1.668 (1.372–2.026)	< 0.001
Unknown	0.940 (0.487–1.816)	0.854
Job, n (%)
Office-worker	Reference
Others	1.043 (0.913–1.193)	0.534
Unknown	1.560 (1.127–2.160)	0.007
Alcohol consumption, n (%)
0 g/week	Reference
> 0 and < 100 g/week	0.965 (0.823–1.132)	0.661
≥ 100 g/week	1.288 (1.123–1.477)	< 0.001
Unknown	0.875 (0.583–1.313)	0.518
ln (MET) (continuous)	0.979 (0.961-.0998)	0.029
IPSS severity, n (%)
Normal to mild	Reference
Moderate	2.012 (1.761–2.300)	< 0.001
Severe	3.422 (2.467–4.747)	< 0.001
(2) Variables associated with the presence of moderate to severe stress
Age, years (continuous)	0.957 (0.949–0.964)	< 0.001
Current smoker (yes vs. no)	1.371 (1.192–1.576)	< 0.001
Amount of smoking, PY (continuous)	1.006 (1.002–1.011)	0.005
Marital status, n (%)
Yes	Reference
Others	1.670 (1.374–2.030)	< 0.001
Unknown	0.961 (0.477–1.936)	0.911
Income, n (%)
≥ $2684	Reference
< $2684	1.281 (1.056–1.555)	0.012
Unknown	0.995 (0.722–1.371)	0.974
ln (MET) (continuous)	0.982 (0.963–1.002)	0.074
IPSS severity, n (%)
Normal to mild	Reference
Moderate	1.861 (1.622–2.136)	< 0.001
Severe	3.196 (2.374–4.302)	< 0.001