Table 3.

Logistic regression model evaluating factors associated with ever smoking

Variables	Unadjusted				Adjusted
	OR	(95% CI)		Pvalue	OR	(95% CI)		Pvalue
Sex
Women	1				1
Men	3.86	(3.66,	4.07)	< 0.001	4.18	(3.96,	4.42)	< 0.001
Age (y)
> 74	1				1
40–54	2.74	(2.50,	3.02)	< 0.001	3.12	(2.79,	3.49)	< 0.001
55–64	2.75	(2.48,	3.05)	< 0.001	3.16	(2.82,	3.54)	< 0.001
65–74	1.03	(0.92,	1.16)	0.592	1.09	(0.96,	1.23)	0.176
Insured Category
Category I	1				1
Category II	1.16	(1.09,	1.24)	< 0.001	1.31	(1.20,	1.43)	< 0.001
Category III	0.75	(0.70,	0.80)	< 0.001	1.18	(1.05,	1.31)	0.004
Category V	1.85	(1.45,	2.37)	< 0.001	2.09	(1.56,	2.80)	< 0.001
Category VI	0.96	(0.89,	1.04)	0.313	1.25	(1.13,	1.38)	< 0.001
Insured monthly salary (NTD)
≤ 17,280	1				1
17,280–22,800	0.87	(0.78,	0.97)	0.012	0.90	(0.78,	1.04)	0.160
22,801–36,300	1.07	(0.95,	1.20)	0.249	1.11	(0.96,	1.28)	0.149
> 36,301	1.12	(0.99,	1.26)	0.070	0.98	(0.85,	1.13)	0.800
Urbanization of residence area
I	1				1
II, III	1.11	(1.04,	1.18)	0.002	1.09	(1.01,	1.17)	0.019
IV, V	0.96	(0.89,	1.04)	0.284	1.05	(0.95,	1.15)	0.344
VI, VII	0.93	(0.84,	1.01)	0.095	1.03	(0.92,	1.15)	0.609
Comorbidity
COPD
No	1				1
Yes	0.89	(0.79,	0.99)	0.041	1.15	(1.02,	1.31)	0.029
Hypertension
No	1				1
Yes	0.71	(0.67,	0.76)	< 0.001	0.95	(0.89,	1.02)	0.140
Stroke
No	1				1
Yes	0.71	(0.64,	0.79)	< 0.001	1.02	(0.90,	1.16)	0.730
CAD
No	1				1
Yes	0.71	(0.65,	0.78)	< 0.001	0.99	(0.88,	1.13)	0.922
Adult preventive care
No	1				1
Yes	0.90	(0.85,	0.95)	< 0.001	1.05	(0.99,	1.11)	0.116