Efficacy and Safety of Osimertinib in Treating EGFR‐Mutated Advanced NSCLC: A Meta‐analysis

Osimertinib is the only Food and Drug Administration‐approved third‐generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI). A meta‐analysis was performed to aggregate the mixed results of published clinical trials to assess the efficacy and safety of osimertinib. A systematic search of the PubMed, Web of Science and Cochrane Library electronic databases was performed to identify eligible literature. The primary endpoints were overall response rate (ORR), disease control rate (DCR), progression‐free survival (PFS), and adverse events (AEs). A total of 3086 advanced non‐small‐cell lung cancer (NSCLC) patients from 11 studies have been identified. The aggregate efficacy parameters for treatment‐naïve patients with EGFR‐TKI sensitizing mutations are as follows: ORR 79% (95% CI 75%‐84%), DCR 97% (95% CI 95%‐99%), 6‐month PFS 83% (95% CI 80%‐87%), and 12‐month PFS 64% (95% CI 59%‐69%). The aggregate efficacy parameters for advanced NSCLC harboring T790M mutations after earlier‐generation EGFR‐TKI therapy are as follows: ORR 58% (95% CI 46%‐71%), DCR 80% (95% CI 63%‐98%), 6‐month PFS 63% (95% CI 58%‐69%), and 12‐month PFS 32% (95% CI 17%‐47%). EGFR‐TKI‐naïve patients with EGFR‐positive mutations tend to have longer median PFS than EGFR‐TKI‐pretreated counterparts (19.17 months vs. 10.58 months). The most common AEs were diarrhea and rash, of which the pooled incidences were 44% and 42%, respectively. Generally, osimertinib is a favorable treatment option for previously treated T790M mutation‐positive advanced NSCLC as well as a preferable therapy for untreated EGFR mutation‐positive advanced NSCLC. Additionally, osimertinib is well tolerated by most patients.

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