Additional file 2: Supplementary Fig. 2. Prognostic impact of radiation course and the geriatric nutritional risk index (GNRI). (a) Kaplan–Meier curve for overall survival (OS) in patients with rectal cancer according to the select of radiation course (n = 93). OS was not significantly different between long course chemoradiation (CRT) (n = 69) and short course CRT (n = 24) (p = 0.18, log-rank test). (b) Kaplan–Meier curve for disease-free survival (DFS) in patients with rectal cancer according to the select of radiation course (n = 93). DFS was not significantly different between long course chemoradiation (n = 69) and short course CRT (n = 24) (p = 0.24, log-rank test). (c) Kaplan–Meier curve for OS in rectal cancer patients with GNRI high group (n = 55). OS was not significantly different between long course CRT (n = 41) and short course CRT (n = 14) (p = 0.23, log-rank test). (d) Kaplan–Meier curve for DFS in rectal cancer patients with GNRI high group (n = 55). DFS was not significantly different between long course CRT (n = 41) and short course CRT (n = 14) (p = 0.52, log-rank test). (e) Kaplan–Meier curve for OS in rectal cancer patients with GNRI low group (n = 38). OS was not significantly different between long course CRT (n = 28) and short course CRT (n = 10) (p = 0.49, log-rank test). (f) Kaplan–Meier curve for DFS in rectal cancer patients with GNRI low group (n = 38). DFS was not significantly different between long course CRT (n = 28) and short course CRT (n = 10) (p = 0.96, log-rank test).