Abstract: Objective To investigate the predictive value of trauma index (TI) score combined with C-reactive protein/albumin ratio (CAR) on the prognosis of elderly patients with femoral intertrochanteric fracture.Methods From December 2017 to December 2022,182 elderly patients with femoral intertrochanteric fracture in our hospital were retrospectively selected.According to the survival situation at 1 year after operation,they were divided into survival group and death group.The clinical data of the two groups were compared,and the TI score and CAR value were measured.To determine the independent influencing factors of postoperative death,and to observe the predictive effect of TI score and CAR value on postoperative death.Results Among the 182 elderly patients with femoral intertrochanteric fractures,24 cases (13.19 %) died one year after operation.Multivariate Logistic regression analysis showed that age,number of preoperative basic diseases,TI score and CAR value were independent risk factors for death at 1 year after operation,and self-care ability before injury was an independent protective factor (P<0.05).The receiver operating characteristic (ROC) curve showed that both TI score and CAR value had a certain predictive effect on postoperative death.The area under curve (AUC) was the highest when the two were combined,which was 0.905.The predictive sensitivity was 83.33 % and the specificity was 94.94 %.Conclusion TI score and CAR value have good predictive efficacy for the prognosis of elderly patients with femoral intertrochanteric fracture,and can be used as reference indicators to evaluate the prognosis of patients.

Key words: trauma index; C-reactive protein / albumin; femoral intertrochanteric fracture; prognostic prediction