Table 2. Cox proportional hazard model of lung cancer, by age.

	Hazard Ratio (P-Value)
	All Ages	50–59	60–69	70+
IEAA	1.50 (3.4×10−3)	0.94 (0.91)	1.35 (0.11)	2.51 (7.7×10−4)
Age	1.09 (2.0×10−3)	1.45 (0.17)	1.11 (0.19)	1.26 (0.05)
Black	0.87 (0.73)	1.12 (0.94)	0.64 (0.37)	1.88 (0.46)
Hispanic	1.25 (0.67)	0.90 (0.95)	0.72 (0.68)	6.53 (0.04)
CHD	0.64 (0.22)	0.00 (0.99)	0.61 (0.27)	0.90 (0.87)
Former Smoker	2.22 (0.09)	2.39 (0.53)	2.35 (0.18)	2.02 (0.41)
Current Smoker	6.17 (3.8×10−4)	3.22 (0.44)	5.38 (0.02)	14.78 (3.2×10−3)
Pack Years	1.03 (1.7×10−7)	1.01 (0.56)	1.03 (1.1×10−4)	1.04 (2.1×10−3)
N	2,029	505	947	577
Events	43	4	27	12
Total Person-Years	28,688	7,595	13,540	7,554
R2	0.036	0.012	0.045	0.054