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Kaplan-Meier analysis of overall survival (OS) times in patients receiving different platinum-based treatments. MST was 15 months (95% CI, 3.4–16.6) in the DDP group and 20 months (95% CI: 17–23) in the NDP group (Log-rank test: χ2=5.189, P=0.023). MST, median survival time; CI, confidence interval; DDP, cisplatin; NDP, nedaplatin.
