Background: Can single-agent maintenance therapy be considered as an ideal strategy for non-small cell lung cancer (NSCLC) treatment to achieve prolonged survival and tolerated toxicity? A systematic review and meta-analysis was performed to elucidate this issue.
Methods: The electronic databases were searched for RCTs comparing single-agent maintenance therapy with placebo, best support care or observation. The required data for estimation of response, survival and toxicity were extracted from the publications and the combined data were calculated.
Results: Eleven RCTs involving 3686 patients were identified. We found a statistically significant higher probability of tumor response for patients with maintenance therapy versus control patients (OR: 2.80, 95%CI: 2.15 - 3.64). Patients receiving maintenance therapy had significantly longer progression-free survival (PFS) (HR: 0.67, 95%CI: 0.62 - 0.71) and overall survival (OS) (HR: 0.84, 95%CI: 0.78 - 0.90). However, maintenance therapy was associated with more severe toxicities (OR: 6.45, 95%CI: 4.61 - 9.01).
Conclusion: In patients with advanced NSCLC, the use of single-agent maintenance therapy is associated with higher response rate and significantly prolongs PFS and OS despite of the risk of additional toxicity.
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