Fig. 4

Kaplan–Meier survival analyses of elderly hip fracture patients according to SII–GNRI score. Hazard ratio (HR) was calculated using a Cox regression analysis, and p value was estimated using the log-rank test, and the shaded areas indicate 95% confidence interval (CI). The numbers shown below the Kaplan–Meier survival curves are the number of patients at risk at the specified month for each group