Meta-Analysis Of Progression-Free Survival As A Predictor Of Overall Survival In Locally Advanced Or Metastatic Non-Small Cell Lung Cancer Trials.

7604 Background: Access to new oncology treatments for non-small-cell lung cancer (NSCLC) could be expedited if progression free survival (PFS) was accepted by payers as a valid endpoint predictive for overall survival (OS). We investigated the relationship between PFS and OS in advanced NSCLC, which has previously been limited by available data. Methods: A systematic review of the published literature was conducted (1988 to August 2011; Medline/Embase/Cochrane). Identified studies were assessed against the following criteria for inclusion in the analysis: randomised design; NSCLC; advanced disease (Stage IIIb or IV); pharmacological treatment in 2 or more groups; reported outcomes included median OS and median PFS. For each pair of treatment groups compared, the median OS difference and the median PFS difference were calculated. The data were analysed with locally weighted least squares regression (LOWESS) to validate the linear relationship. Unweighted and weighted linear regression was used to test the...