Table 2.

Multivariable Cox Proportional Hazards model for factors associated with survival

		95% Confidence Interval
Variable	Hazard Ratio	Lower	Upper	p-value
Age (per year)	1.02	1.01	1.03	<0.001
Female sex (reference: male)	0.84	0.73	0.97	0.02
Race (reference: White)
Black	1.00	0.73	1.35	0.98
Year of diagnosis (per year)	1.00	0.97	1.04	0.94
Charlson-Deyo Comorbidity Index (reference: 0)
1	1.00	0.85	1.17	0.98
2+	1.34	1.10	1.63	0.003
Insurance status (reference: private)
Government	1.19	0.99	1.42	0.07
None	0.38	0.12	1.19	0.10
Academic center	1.00	0.86	1.17	0.97
Tumor size (per 10 mm)	1.16	1.08	1.25	<0.001
Type of surgery (reference: lobectomy)
Wedge resection	1.53	1.31	1.79	<0.001
Segmentectomy	1.20	0.87	1.67	0.27
N=1948