Table 3. Cox proportional hazard model of lung cancer, by smoking status.

	Hazard Ratio (P-Value)
	Current Smokers	Former Smokers	Never Smokers
IEAA	2.06 (6.1×10−3)	1.41 (0.11)	1.21 (0.60)
Age	1.15 (0.02)	1.04 (0.31)	1.14 (0.03)
Black	0.69 (0.65)	0.86 (0.77)	1.17 (0.90)
Hispanic	2.06 (0.65)	0.00 (0.99)	6.79 (0.02)
CHD	0.53 (0.33)	0.38 (0.12)	1.52 (0.57)
Pack Years	1.04 (2.3×10−3)	1.02 (2.4×10−4)
N	211	714	1,104
Events	13	22	8
Total Person-Years	2,799	10,015	15,875
R2	0.122	0.037	0.008