Fig. 4

Stacked cumulative incidence plots based on the Kaplan-Meier method. A For all patients, the risk of non–cancer-specific death (non-CSD) exceeded that of CSD approximately 280 months after diagnosis. B In patients who underwent RT only, non-CSD gradually increased until it exceeded CSD at approximately 120 months. C In patients with early-stage disease, non-CSD gradually increased until it exceeded CSD at approximately 200 months. D In patients with advanced-stage disease, the risk of CSD always exceeded the risk of non-CSD