Fig. 4From: A prognostic nomogram to predict survival in elderly patients with small-cell lung cancer: a large population-based cohort study and external validationDecision curve analyses (DCA) of the nomogram and 7th AJCC TNM staging system for 1-year (A, C) and 2-year (B, D) overall survival in the training cohort (A–B) and internal validation cohort (C–D)Back to article page