Matched-pair comparison of outcome of patients with clinical stage I non-small cell lung cancer treated with resection or stereotactic radiosurgery.

7040 Background: Stereotactic body radiotherapy (SBRT) is an alternative to surgery alone for certain patients with clinical stage I non-small cell lung cancer (NSCLC), but comparing their effectiveness is difficult because of differences in patient selection and staging. Methods: Two databases were combined which contained 132 patients treated by lobectomy (LR) and 48 by sublobar resection (SLR) and 137 patients managed with SBRT after negative staging between 1999-2009. We compared rates of overall survival (OS), disease-free survival (DFS), and locoregional control (LRC) between patients treated with surgery and SBRT to each other and in relation to possible prognostic factors. We then performed a matched-pair analysis comparing surgery and SBRT results. Median follow-up for the entire study population was 25.8 months. Results: On univariate analysis, OS was significantly correlated with histology, the Charlson Comorbidity Index, tumor size, aspirin use, and use of SBRT; DFS was correlated only with hi...