Table 3

Contribution of D genotype to smoking habit in logistic regression analysis

		All smokers (n=203)				Current smokers (n=92)				Ex-smokers (n=111)
Definition	Factor	χ²	p value	OR	95% CI	χ²	p value	OR	95% CI	χ²	p value	OR	95% CI
CC=lifelong cigarette consumption (pack years); duration=duration of smoking period (years); OR=odds ratio; CI=confidence interval.
p<0.05, *p<0.01.
OR and 95% CI correspond to having genotype D or aging every 10 years.
CC ≥60	Genotype D	6.21	0.01*	0.44	0.23 to 0.84	3.71	0.05	0.42	0.18 to 1.02	3.37	0.07	0.38	0.13 to 1.07
	Age (10 years)	2.97	0.08	1.31	0.96 to 1.77	1.17	0.28	1.32	0.80 to 2.19	2.61	0.11	1.40	0.93 to 2.12
Packs/day ≥1.5	Genotype D	7.16	<0.01**	0.42	0.23 to 0.80	8.26	<0.01**	0.27	0.11 to 0.66	0.62	0.43	0.69	0.27 to 1.75
	Age (10 years)	5.45	0.02*	0.69	0.51 to 0.94	3.22	0.07	0.62	0.36 to 1.05	1.93	0.17	0.76	0.51 to 1.12
Duration ≥40	Genotype D	0.09	0.77	0.89	0.41 to 1.93	0.03	0.85	1.11	0.36 to 3.48	2.84	0.09	0.34	0.09 to 1.20
	Age (10 years)	51.2	<0.01**	6.85	4.04 to 11.61	23.2	<0.01**	15.4	5.06 to 46.9	26.1	<0.01**	5.52	2.87 to 10.6