Table 2.

Cox proportional hazards multivariable model for predictors of overall survival of patients with non‐small‐cell lung cancer

Parameter	Hazard Ratio	95% Hazard ratio confidence limits	P‐value
Facility type (Community center)
Academic center	0.929	0.922‐0.936	<0.0001
Age at diagnosis (<60)
60‐69	1.06	1.05‐1.07	<0.0001
70‐79	1.171	1.159‐1.182	<0.0001
≥80	1.304	1.289‐1.319	<0.0001
Race (white)
Black	0.946	0.936‐0.956	<0.0001
Asian/Pacific Islander	0.784	0.765‐0.802	<0.0001
Hispanic	0.811	0.767‐0.858	<0.0001
Native American/Alaska Native	0.953	0.895‐1.015	0.1329
Charlson‐Deyo comorbidity score(0)
1	1.182	1.174‐1.19	<0.0001
≥2	1.379	1.366‐1.392	<0.0001
Median local annual income(˂$38 000)
$38 000‐$47 999	0.975	0.966‐0.984	<0.0001
$48 000‐$62 999	0.965	0.955‐0.975	<0.0001
$63 000+	0.929	0.918‐0.941	<0.0001
Percent without high school diploma (≥21%)
13‐20.9%	1.013	1.003‐1.023	0.0084
7‐12.9%	1.005	0.995‐1.016	0.3186
<7%	0.975	0.962‐0.987	<0.0001
Insurance status (Uninsured)
Government insurance	0.962	0.938‐0.987	0.0027
Private insurance	0.868	0.846‐0.891	<0.0001
Type of residential area (Metropolitan)
Urban	1.015	1.006‐1.024	0.0008
Rural	1.028	1.007‐1.049	0.0094
Geographic region (East coast)
Central	1.059	1.052‐1.066	<.0001
Mountain	0.969	0.953‐0.986	0.0003
Pacific	0.981	0.971‐0.992	0.0008
Year of diagnosis (2004‐2009)
2010‐2013	0.876	0.871‐0.882	<0.0001
TNM stage (stage 1)
Stage 2	1.86	1.835‐1.886	<0.0001
Stage 3	2.462	2.437‐2.489	<0.0001
Stage 4	4.183	4.14‐4.228	<0.0001
Distance from treatment facility(per 500 mile change)	0.924	0.906‐0.942	<0.0001
Facility volume (Low volume)
High‐volume center	0.951	0.944‐0.958	<0.0001
Chemotherapy (No)
Yes	0.550	0.547‐0.554	<0.0001
Immunotherapy (No)
Yes	0.774	0.728‐0.822	<0.0001
Palliative care (No)
Yes	1.370	1.358‐1.383	<0.0001
Radiation (No)
Yes	0.903	0.897‐0.909	<0.0001
Surgery (No)
Yes	0.404	0.399‐0.409	<0.0001