. Author manuscript; available in PMC: 2014 Aug 27.

Published in final edited form as: Cancer Causes Control. 2011 Nov 25;23(1):175–185. doi: 10.1007/s10552-011-9866-9

Table 1.

Characteristics of the SEER study population

	NSCLC^*	IDC^*
Year of diagnosis	1988--2003	1975--1979
Gender	Male	Female
Sample size	52,660	20,474
Mean age at diagnosis (yr)	68	61
Mean tumor size at diagnosis (cm)^**	4.4	2.5
Advance stage at diagnosis ^** (%)	60	5
Median survival (yr)	0.7	>30

	NSCLC^*	IDC^*

Year of diagnosis	1988--2003	1975--1979
Gender	Male	Female
Sample size	52,660	20,474
Mean age at diagnosis (yr)	68	61
Mean tumor size at diagnosis (cm)^**	4.4	2.5
Advance stage at diagnosis ^** (%)	60	5
Median survival (yr)	0.7	>30

Histology types are identified using ICD-O-3 codes: Non-small cell lung carcinoma (NSCLC): 8078, 8012/3, 8070–8076, 8410, 8141, 8143, 8147; Invasive ductal carcinoma (IDC):

^**

Excluding patients with missing tumor size or stage.