Table 3.

OR estimates between various smoking-related variables (categorical) and lung cancer risk

Model	Cigarette smoking variablesa	Unit or category	ORb [95% CI]		DF	AIC
Among men
Among all subjects (non-smokers being the reference group) - [N = 1,630 for men]
a	Ever smoking	No	1	-	24	1907
		Yes	7.82	[4.59 - 13.30]
b	Smoking status	Non-smoker	1	-	25	1796
		Ex-smoker	3.99	[2.31 - 6.87]
		Current smoker	14.93	[8.66 - 25.73]
c	Duration of smoking	0	1	-	28	1747
		]0-20]	1.23	[0.60 - 2.51]
		]20-30]	2.98	[1.61 - 5.51]
		]30-40]	7.84	[4.43 - 13.89]
		]40-50]	12.82	[7.28 - 22.55]
		>50	28.94	[15.60 - 53.66]
d	Intensity of smoking	0	1	-	27	1848
		]0-20]	3.18	[1.78 - 5.68]
		]20-30]	9.50	[5.50 - 16.39]
		]30-40]	9.53	[5.11 - 17.76]
		>40	11.87	[6.71 – 20.97]
e	Pack-years	0	1	-	29	1762
		]0-20]	1.33	[0.67 - 2.66]
		]20-40]	3.99	[2.21 - 7.19]
		]40-60]	9.46	[5.38 - 16.62]
		]60-80]	13.14	[7.30 - 23.63]
		]80-100]	11.13	[5.74 - 21.56]
		>100	23.64	[12.87 - 43.40]
f	CSI index	0	1	-	27	1721
		]0-1]	1.52	[0.79 - 2.89]
		]1-2]	5.13	[2.96 - 8.89]
		]2-2.5]	14.80	[8.47 - 25.83]
		>2.5	24.35	[13.38 - 44.30]
Among subjects who ever smoked (current smokers or subjects who quit smoking less than 2 years before the reference date being the reference group) - [N = 1,461 for men]
g	Time since cessation	0	1	-	26	1646
		]0-10]	0.45	[0.31 - 0.63]
		]10-20]	0.27	[0.19 - 0.38]
		>20	0.10	[0.06 - 0.17]
Among women
Among all subjects (non-smokers being the reference group) - [N = 1,075 for women]
a	Ever smoking	No	1.00	-	16	1066
		Yes	11.76	[7.50 - 18.42]
b	Smoking status	Non-smoker	1.00	-	17	1001
		Ex-smoker	4.80	[2.90 - 7.93]
		Current smoker	21.33	[13.23 - 34.38]
c	Duration of smoking	0	1.00	-	19	978
		]0-20]	1.51	[0.74 - 3.04]
		]20-30]	6.37	[3.55 - 11.41]
		]30-40]	13.64	[8.19 - 22.74]
		>40	28.79	[16.86 - 49.16]
d	Intensity of smoking	0	1.00	-	18	1028
		]0-20]	6.05	[3.70 - 9.90]
		]20-30]	19.40	[11.81 - 31.86]
		>30	18.20	[10.10 - 32.80]
e	Pack-years	0	1.00	-	19	950
		]0-20]	2.04	[1.11 - 3.74]
		]20-40]	8.66	[5.10 - 14.68]
		]40-60]	25.48	[15.08 - 43.04]
		>60	37.39	[19.79 - 70.62]
f	CSI index	0	1.00	-	18	946
		]0-1]	1.25	[0.62 - 2.51]
		]1-2]	11.98	[7.32 - 19.62]
		>2	29.66	[17.67 - 49.80]
Among subjects who ever smoked (current smokers or subjects who quit smoking less than 2 years before the reference date being the reference group) - [N = 738 for women]
g	Time since cessation	0	1.00	-	17	799
		]0-10]	0.32	[0.20 - 0.51]
		>10	0.15	[0.09 - 0.26]

This table presents the association between each smoking-related (categorical) variable and the logit of the lung cancer risk by sex

^aComputed after a discount up to 2 years when relevant

^bOdds ratio [OR] estimated with logistic regression, adjusted for age, respondent type, education, ethnic group, annual income and exposure to lung carcinogens [each exposure being considered separately]