Till Örebro universitet

OBJECTIVES: To compare postoperative mortality regarding 2 techniques in the treatment of trochanteric hip fractures (THFs). DESIGN: Retrospective cohort study. SETTING: National databases.

PATIENTS: All consecutive surgically treated THF cases between 2008 and 2017 were included. Pathological fractures or patients younger than 60 years were excluded.

INTERVENTION: Patients were grouped based on the surgical technique: sliding hip screw (SHS) or intramedullary (IM) nail. This data set was cross-referenced with a National Board of Health and Welfare's patient registry and a Cause of Death registry.

MAIN OUTCOME MEASUREMENTS: Mortality, comorbidities, and length of stay (LOS).

RESULTS: Forty-six thousand one hundred twenty-one cases were included. Twenty-five thousand eight hundred seventy-seven patients received a SHS, and 20,244 received an IM nail. Patients in the IM group were more often female (71.8% vs. 69.2%, P < 0.001), slightly less fit for surgery (American Society of Anesthesiologists score ≥3: 61.2% vs. 60.1%, P = 0.003), and more frail (Orthopedic Frailty Score ≥2: 54.2% vs. 52.8%, P = 0.005). Multifragment fractures were more prevalent in the IM nail group (66.6% vs. 32.0%, P < 0.001), which suffered from a higher comorbidity burden. After adjusting for potential confounders, no clinically significant differences in 7-day, 30-day, 90-day, or 1-year postoperative mortality were observed. Subgroup analyses focusing on 2-fragment and multifragment fractures could not detect any difference in mortality. LOS was 1 day shorter for the IM nail group as a whole.

CONCLUSIONS: Based on 10 years of data including 46,121 patients with THF managed with SHS or IM nail, no difference was observed in mortality up to 1 year postoperatively, when comparing surgical technique. LOS was shorter for the IM nail group.