Table 2.

Lung cancer mortality risk (n=1,216)

	HRa	95%CI	P value	HRb	95% CI	P value
Screened (vs. unscreened)	0.55	0.29, 1.04	.07	1.14	0.41, 3.13	.79
Male (vs. female)	1.59	1.25, 2.04	.0002	1.62	1.25, 2.08	.00022
Male screened (vs female screened)	0.5	0.14, 1.84	.3	0.57	0.12, 2.58	.46
Male unscreened (vs female unscreened)	1.97	0.54, 7.16	.3	1.6	0.35, 7.31	.54
Age	1.005	0.99, 1.02	.38	1.02	1.01, 1.04	.00036
Smokers	1.62	1.1, 2.37	.014	1.89	1.28, 2.79	.0013
Local advanced	2.82	1.84, 4.34	<.0001	2.91	1.89, 4.49	<.0001
Late stage	6.41	4.77, 8.62	<.0001	7.73	5.65, 10.59	<.0001

^aHazard ratios (HRs) with P-value and 95% confidence intervals (CI) were calculated using the univariate Cox proportional hazard model.

^bHR were adjusted for sex, age, smoking history and stage.

The stages were classified as early-stage (1A, 1B, 2A, 2B), local advanced (3A), and late-stage (3B, 4, extensive).