Table 1. Demographics and clinicopathologic characteristics of patients with CSCLC, NSCLC, and pure SCLC.

Characteristics	CSCLC (n=871)			NSCLC (n=280,391)		P1 value	Pure SCLC (n=45,433)		P2 value
	Number	%		Number	%		Number	%
Age (years)						0.066			0.298
≤60	229	26.3		71,494	25.5		12,775	28.1
60–70	305	35.0		89,909	32.1		16,162	35.6
>70	337	38.7		118,988	42.4		16,496	36.3
Gender						0.099			<0.001
Female	378	43.4		129,512	46.2		22,700	50.0
Male	493	56.6		150,879	53.8		22,733	50.0
Race						<0.001			0.003
White	727	83.5		224,921	80.2		39,384	86.7
Black	109	12.5		34,226	12.2		4,157	9.1
Other	35	4.0		21,244	7.6		1,892	4.2
Primary site						<0.001			<0.001
Left upper lobe	217	24.9		66,680	23.8		9,921	21.8
Left lower lobe	100	11.5		33,018	11.8		4,159	9.2
Right upper lobe	270	31.0		86,587	30.9		11,949	26.3
Right middle lobe	32	3.7		12,179	4.3		1,860	4.1
Right lower lobe	100	11.5		42,316	15.1		4,952	10.9
Main bronchus	66	7.6		11,450	4.1		5,539	12.2
Unspecific	86	9.9		28,161	10.0		7,053	15.5
T						0.014			<0.001
T1	184	21.1		61,292	21.9		5,276	11.6
T2	291	33.4		92,440	33.0		11,830	26.0
T3	36	4.1		18,775	6.7		2,098	4.6
T4	360	41.3		107,884	38.5		26,229	57.7
N						<0.001			<0.001
N0	285	32.7		119,329	42.6		7,029	15.5
N1	83	9.5		26,116	9.3		3,325	7.3
N2	375	43.1		100,578	35.9		26,110	57.5
N3	128	14.7		34,368	12.3		8,969	19.7
M						0.006			<0.001
M0	460	52.8		161,104	57.5		17,051	37.5
M1	411	47.2		119,287	42.5		28,382	62.5
Surgery						0.537			<0.001
None	626	71.9		198,855	70.9		44,275	97.5
Yes	245	28.1		81,536	29.1		1,158	2.5
Radiation						0.009			0.196
None	473	54.3		164,501	58.7		23,669	52.1
Yes	398	45.7		115,890	41.3		21,764	47.9
Chemotherapy						<0.001			<0.001
None	306	35.1		152,260	54.3		12,780	28.1
Yes	565	64.9		128,131	45.7		32,653	71.9

CSCLC, combined small cell lung cancer; NSCLC, non-small cell lung cancer; SCLC, small cell lung cancer.