Fig. 5
Validation of PRNS. A Kaplan–Meier survival analysis stratified by PG-SGA. Well nourished (0–1); Mild malnutrition (2–3); Moderate malnutrition (4–8); Severe malnutrition (> = 9). B Kaplan–Meier survival analysis stratified by PRNS. Well nourished (< = 4.5); Mild malnutrition (5–7.5); Moderate malnutrition (8–14.5); Severe malnutrition (> = 15). C Patients assessed as well nourished by PG-SGA in the testing cohort were regrouped by PRNS: A (≤ 4.5) and B (> 4.5); Patients assessed as well nourished by PRNS in the testing cohort were regrouped by PG-SGA: C (≤ 1) and D (≥ 2). D Kaplan–Meier survival analysis of A and B. E Kaplan–Meier survival analysis of C and D. F Decision curve analysis (DCA) of the clinical utility between PG-SGA and PRNS regarding the overall survival (OS) in the testing cohort. G AUC of PRNS and PG-SGA in the testing cohort (t = 36 months)