Comparison of real-world overall survival between atezolizumab- and durvalumab-containing first-line induction and maintenance regimens in extensive-stage small cell lung cancer.

8093 Background: Both atezolizumab (atezo) and durvalumab (durva) are preferred first-line (1L) systemic treatment options for extensive-stage small cell lung cancer (ES-SCLC) with similar efficacy in the IMpower133 and CASPIAN phase 3 trials. There is limited evidence comparing their survival outcomes in the real-world (rw) setting. This study described rw overall survival (rwOS) in patients (pts) with ES-SCLC treated in 1L and 1L maintenance (1Lm) settings and also compared rwOS stratified by