Incidence rates of immune-related adverse events and their correlation with response in advanced solid tumours treated with NIVO or NIVO+IPI: a systematic review and meta-analysis

Abstract Background Deciphering the correlation between immune-related adverse events (irAEs) categorized by organ system class and clinical benefit of immunotherapy is critical for clinical practice. The aim of this study is to investigate the incidence rates of irAEs and their correlations with objective response rate (ORR) in patients with advanced solid tumours treated with nivolumab (NIVO) or nivolumab plus ipilimumab (NIVO+IPI). Methods PubMed, Embase and Cochrane library were searched for eligible studies from January 1st, 2000 to May 1st 2019. Published clinical trials on NIVO or NIVO+IPI with reported irAEs were included. Logit transformation of the irAE incidences was applied for the generation of pooled estimate and Pearson correlation coefficient was calculated to evaluate the correlation between irAE and ORR. Results 48 clinical trials involving 7936 patients treated with NIVO or NIVO+IPI were included. Compared to NIVO, NIVO+IPI led to more all-grade and grade 3 or higher irAEs categorized by system organ class (P