Conditional survival estimates for lung cancer histologic subtypes in the U.S. (2004-2008).

7550 Background: Conditional survival (CS) is a more accurate measure of survival probability among cancers associated with a poor prognosis. We calculated lung cancer-specific CS estimates to help clinicians and patients with informed decision making. Methods: Lung cancer patients with at least 3 years of follow-up were identified from the Surveillance Epidemiology and End Results registry (2004-2008). American Joint Commission on Cancer, sixth edition was used for staging non-small cell lung cancer (NSCLC). Stages 1 to 3 SCLC were classified as limited stage (LS), and stage 4 was classified was extensive stage (ES). Multivariate Cox regression models were built separately by stage to calculate the adjusted 1-6 year cancer-specific survival and overall survival. The multiplicative law of probability was then used to compute the X-year conditional survival where the (x+y) year survival is divided by y years of patients who have survived. The following were adjusted: age, sex, ethnicity, marital status, SE...