Efficacy and safety of bevacizumab in advanced lung adenocarcinoma patients with stable disease after two cycles of first-line chemotherapy: A multicenter prospective cohort study.

Bevacizumab is the first antiangiogenetic monoclonal antibody, combined with platinum-based double agent chemotherapy, which has been reported to improve the objective response rate (ORR) and progression-free survival (PFS) in patients with advanced nonsquamous non-small cell lung cancer (NSCLC), and to improve overall survival (OS) in patients when combined with carboplatin and paclitaxel. However, serious adverse effects have been reported to be associated with bevacizumab therapy. In this multicenter prospective cohort study of advanced lung adenocarcinoma patients with stable disease after two cycles of platinum-based double agent chemotherapy, we will compare the ORR between the group who continued with their original chemotherapy regimen and the group in which bevacizumab was added to the original regimen. It is expected that there will be an ORR improvement of 20% in patients in the bevacizumab group plus chemotherapy, compared with those in the original chemotherapy group. This study has been registered as Clinical Trial NCT03240549.