Table 3.

Results of multiple logistic regression of lung cancer risk on sex, age at randomization, family history of lung cancer, cotinine, total NNAL, PheT, and years of cigarette smoking

Variables	OR	95% Confidence limits			P
Variables	OR			Lower	P	Upper
Sex (men vs. women)	1.38	0.68	2.79	0.3701
Age at randomization	1.10	1.02	1.18	0.0187
Family history of lung cancer	2.57	0.87	7.60	0.0891
Cotinine*	0.85	0.59	1.23	0.3947
Total NNAL*	1.57	1.08	2.28	0.0182
PheT*	1.23	0.88	1.72	0.2274
Years of cigarette smoking^†	1.54	0.86	2.75	0.1454

↵* Represents OR associated with a unit standard deviation increase.
↵† Represents OR associated with a 10-year increase in smoking duration.