Sex differences in short- and mid-term survival of femoral neck fracture in patients aged over 90 years: A retrospective cohort study

Objectives: The primary purpose of this retrospective study was to evaluate the sex differences in shortand mid-term mortality in femoral neck fracture patients aged >90 years treated operatively and nonoperatively over a 10-year period.Methods: From January 2007 to December 2016, all femoral neck fractures patients (aged over 90 years) admitted to our hospital were included for evaluation. The survival time and mortality rate were compared between patients treated by arthroplasty and those treated nonoperatively. Additionally, a Cox proportional hazards model was built to explore the treatment effect difference between the arthroplasty group and the nonoperative group with sex-stratified subgroups.Results: The difference in the survival distribution between the nonoperative and arthroplasty groups were significant for women (P = 0.002) but not for men (P = 0.6222). The adjusted hazard ratio (95% confidence interval) of nonoperative treatment to arthroplasty was 3.93 (1.86, 8.31). The adjusted risk ratios of nonoperative treatment to arthroplasty for males and females were 1.24 (0.58, 2.67) and 34.04 (8.68, 133.47), respectively. The data also showed higher shortConclusions: Arthroplasty can significantly improve short- and mid-term survival in femoral neck fracture patients aged over 90 years, especially females. The most significant difference in mortality between the two sexes was observed within the first three years following the fracture.(c) 2022 Asian Surgical Association and Taiwan Robotic Surgery Association. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).