Cause of Death and Factors Associated With 5-Year Mortality After Hip Fracture Surgery

Abstract

Aim: the aims of this study were to identify the 5-year mortality rate after hip fracture, identify factors associated with this mortality, and identify the cause of death in these patients.Materials and Methods: A retrospective cohort study of geriatric patients (≥60 years of age) undergoing a hip fracture surgical procedure admitted to our institution between the 1 January 2012 and 31 December 2016 was performed. Demographic and clinical characteristics were collected. Patients or their careers were contacted by telephone or outpatient to ascertain their vital status, and cause of death if they had died at 5-year post-surgery. According to whether they were alive or death at 5-year post-surgery, patients were divided into survivor or non-survivor group. All variables including demographic data and clinical characteristics were compared for both survivors and non-survivors. Cox proportional hazards were used to determine independent risk factors for 5-year mortality. All cause of 5-year mortality in hip fracture were recorded.Result: A total of 327 patients with a median age of 80.00 years were included. 5-year mortality was 40.1%, and the death peak was concentrated during 6 months after surgery. The final multivariate model included 4 independent mortality risk factors: advanced age, stroke, albumin, delayed surgery, with an HR (95% confidence interval) 1.052(1.025-1.080), 1.612(1.104-2.353), 0.940(0.900-0.982), 1.638(1.072-2.498), respectively. Pulmonary infection, and cardiovascular disease were the most common cause of 5-year death.Conclusion: Our results showed that 5-year mortality was 40.1%. Advanced age, stroke, low albumin, and delayed surgery were associated with 5-year mortality after hip fracture surgery. Pulmonary infection, and cardiovascular disease were the most common cause of death.