NPPB and hip fracture: Multivariate Cox analysis revealed the following independent predictors of 1-year all-cause mortality in elderly hip fracture patients after PSM: age (HR 1.066, 95% CI: 1.016 ~ 1.118), HCT (HR 0.922, 95% CI: 0.872 ~ 0.975), CAR (HR 1.476, 95% CI: 1.209 ~ 1.801), and BNP (HR 1.001, 95% CI: 1.000 ~ 1.001) (Table 3).