Background/Aim: We investigated whether the efficacy and type of pre-nivolumab chemotherapy influence outcomes in non-small cell lung cancer patients following nivolumab treatment. Patients and Methods: In this multicenter study, 199 patients treated with nivolumab were retrospectively reviewed. We analyzed the relationships between the clinical response to nivolumab and to chemotherapy administered immediately beforehand. Results: Patients who achieved objective responses to pretreatments showed higher disease control rates with nivolumab than patients who did not (64% vs. 47%, p=0.03), as did those who achieved disease control with pretreatments (62% vs. 35%, p<0.001). Bevacizumab-pretreated patients tended to show better objective response rates with nivolumab (27% vs. 13%, p=0.06); the objective response rate to nivolumab was significantly higher in bevacizumab-pretreated patients who showed clinical responses (42% vs. 9.1%, p=0.02). Conclusion: Achievement of a clinical response to chemotherapy immediately before nivolumab, particularly when combined with bevacizumab, increases the likelihood of disease control post-nivolumab.
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