Abstract
Background: The effectiveness of immunotherapies for non-small-cell lung cancer under real-world clinical settings remains uncertain. Materials & methods: Systematic searches of PubMed, EMBASE and Web of Science were conducted. Random-effects models were used to estimate pooled median overall survival and progression-free survival estimates. Results: 36 studies of nivolumab were included for narrative synthesis and 11 of these studies were included for meta-analysis. Age, sex, histology and prior lines of treatment did not affect survival outcomes, while Eastern Cooperative Oncology Group Performance Status and brain metastasis were inversely associated with survival. In the meta-analysis, nivolumab was associated with 9.6 months (95% CI: 8.4-10.9) of overall survival and 2.6 months (95% CI: 1.6-3.6) of progression-free survival. Conclusion: Very-low-certainty evidence suggested the real-world effectiveness of nivolumab was consistent with those observed in the clinical trials.
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