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Background:Nonsmall cell lung cancer (NSCLC)-patients treated with standard chemotherapy experienced progression rapidly. A novel therapy based on programed death 1 (PD-1)/programed death ligand 1 (PD-L1) inhibitors showed an increasing potential in several malignancies including advanced NSCLC. Objectives:This article is a meta-analysis aiming to systematically evaluate the efficacy and safety profiles of PD-1/PD-L1 agents in patients with NSCLC. Data sources:Data were collected from eligible studies searched from PubMed, ScienceDirect, and Web of Science. Synthesis methods:Pooled hazard ratio (HR) for overall survival (OS) and progression-free survival (PFS) was estimated to assess the efficacy of PD-1/PD-L1 inhibitors versus docetaxel, pooled odds ratio (OR) was calculated for objective response rate (ORR). The overall frequency was estimated for 1-year OS, 1-year progression-free survival, and ORR. A subgroup analysis among NSCLC patients tested with different epidermal growth factor receptor (EGFR) status was also performed to figure out the relationship between EGFR status and efficacy of PD-1/PD-L1 therapies. OR for occurrence of any grade and grade 3 to 5 treatment-related adverse effect was calculated for evaluating the safety of PD-1/PD-L1 therapies. Results:Nine studies were included in this analysis. The pooled HRs for OS and PFS were 0.68 (95% confidence interval [CI] 0.61–0.75) and 0.83 (95% CI 0.75–0.91), respectively, the pooled OR for ORR was 1.83 (95% CI 1.41–2.36), indicating a significant improvement in OS, PFS, and ORR. In the results of subgroup analysis, the HR for OS in NSCLC patients was 1.05 (95% CI 0.69–1.59) in patients with mutant EGFR and 0.66 (95% CI 0.57–0.77) in patients with wild-type EGFR status. OR for occurrence was 0.36 (95% CI 0.28–0.46) in any grade treatment-related adverse effect and 0.18 (95% CI 0.14–0.22) in grade 3 to 5 treatment-related adverse effect, suggesting a superior safety profile of PD-1/PD-L1 inhibitors. Conclusion:The PD-1/PD-L1 therapy significantly prolonged the OS and improved the ORR, simultaneously lowering the treatment-related adverse effect events versus docetaxel.

A meta-analysis of efficacy and safety of antibodies targeting PD-1/PD-L1 in treatment of advanced nonsmall cell lung cancer