Table 4.

Distribution of SPLC SEER Stage by IPLC SEER Stage in Patients with a History of an IPLC

IPLC SEER stage	SPLC SEER Stage
	Localized		Regional		Distant		Unstaged		Total
	N	Row %	N	Row %	N	Row %	N	Row %
Localized	1184	46%	657	26%	570	22%	150	6%	2561
Regional	694	43%	402	25%	378	24%	129	8%	1603
Distant	132	39%	86	26%	90	27%	27	8%	335
Unstaged	44	35%	38	31%	33	27%	8	6%	123
Total	2055	44%	1184	26%	1070	23%	313	7%	4622

SPLC, second primary lung cancer; SEER, Surveillance, Epidemiology, and End Results; IPLC, initial primary lung cancer.