Table 1. Demographics of patients with newly diagnosed lung cancer from 2008 to 2010.

Characteristic	Total (N=74,754)	Surgery only (N=6,393)	Systemic therapy with surgery (N=8,365)	Systemic therapy without surgery (N=29,775)	No treatment (N=9,499)	Refusal of any treatments	P value
Female	23,054 (30.8%)	2,402 (37.6%)	2,455 (29.3%)	7,617 (25.6%)	3,182 (33.5%)	7,398 (35.7%)	<0.01
Age	67.4±11.9	63.7±10.8	62.6±10.1	65.8±10.5	73.5±9.8	69.9±13.8	<0.01
Lung dx. year
2008	24,457 (32.7%)	1,828 (28.6%)	2,732 (32.7%)	9,455 (31.8%)	3,247 (34.2%)	7,195 (34.7%)
2009	24,543 (32.8%)	2,180 (34.1%)	2,695 (32.2%)	9,816 (33.0%)	3,070 (32.3%)	6,782 (32.7%)
2010	25,754 (34.5%)	2,385 (37.3%)	2,938 (35.1%)	10,504 (35.3%)	3,182 (33.5%)	6,745 (32.5%)
CCI	8.5±3.8	7.1±3.9	9.8±3.7	9.9±3.2	11.0±2.3	5.2±2.6	<0.01
Chemotherapy	32,529 (43.5%)	0 (0.0%)	7,399 (88.5%)	25,130 (84.4%)	0 (0.0%)	0 (0.0%)	<0.01
Surgery	14,758 (19.7%)	6,393 (100.0%)	8,365 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	<0.01
Radiotherapy	24,374 (32.6%)	0 (0.0%)	4,862 (58.1%)	19,512 (65.5%)	0 (0.0%)	0 (0.0%)	<0.01
Chemotherapy + surgery	18,763 (25.1%)	0 (0.0%)	3,896 (46.6%)	14,867 (49.9%)	0 (0.0%)	0 (0.0%)	<0.01
Chemotherapy + surgery	7,399 (9.9%)	0 (0.0%)	7,399 (88.5%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	<0.01
Surgery + radiotherapy	4,862 (6.5%)	0 (0.0%)	4,862 (58.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	<0.01
Overall follow-up (days)	926.7±961.8	1,965.7±829.3	1,593.8±884.0	583.9±653.7	325.3±593.8	1,104.9±1,074.6	<0.01
ICU admission	23,365 (31.3%)	4,410 (69.0%)	6,343 (75.8%)	7,127 (23.9%)	1,842 (19.4%)	3,643 (17.6%)	<0.01
Overall mortality	57,840 (77.4%)	2,011 (31.5%)	4,698 (56.2%)	27,653 (92.9%)	9,049 (95.3%)	14,429 (69.6%)	<0.01

CCI, Charlson Comorbidity Index; LOS, length of stay; ICU, intensive care unit; MV, mechanical ventilator; CPR, cardiopulmonary resuscitation.