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Kaplan–Meier estimates of (A) OS and (B) RFS in the hospital cohort, and (C) OS in the nationwide cohort after IPTW. OS or RFS was computed for all patients in the efficacy population. Patients who had not died by the date of data cut-off were censored in the case of OS estimation, and patients who had not experienced recurrence or died as of the date of data cut-off were censored in the case of RFS estimation.
