Delay to Surgery of Less Than 12 Hours Is Associated With Improved Short- and Long-Term Survival in Moderate- to High-Risk Hip Fracture Patients

INTRODUCTION: The effect of delays before surgery of 24 hours, 48 hours, and 72 hours on short- and long-term survival has been investigated comprehensively in hip fracture patients, but with controversial results. However, there is only limited evidence for how a threshold of 12-hour delay before hip fracture surgery affects survival. MATERIALS AND METHODS: A prospective observational study of 884 consecutive hip fracture patients (age ≥ 65 years) undergoing surgery was carried out in terms of 30- and 365-day survival. A Cox hazard regression survival model was constructed for 724 patients with American Society of Anesthesiologists score ≥3 with adjustments of age, gender, cognition, number of medications on admission, hip fracture type, and prior living arrangements. RESULTS: Patients who underwent surgery within 12 hours had better chances of survival than did those with 12 to 24 hours (hazard ratio [HR]: 8.30; 95% confidence interval [CI]: 1.13-61.4), 24 to 48 hours (HR: 7.21; 95% CI: 0.98-52.9), and >48 hours (HR: 11.75; 95% CI: 1.53-90.2) delay before surgery. Long-term survival was more influenced by nonadjustable patient features, but the adverse effect of >48 hours delay before surgery was noticed with HR: 2.02; 95% CI: 1.08-3.80. Increased age and male gender were significantly associated with worse short- and long-term survival. DISCUSSION/CONCLUSIONS: Early hip fracture surgery within 12 hours of admission is associated with improved 30-day survival among patients with ASA score ≥3. Delay to surgery of more than 48 hours has an adverse effect on 365-day survival, but factors related to patients' comorbidities have a great influence on long-term survival.