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Abstract/Summary
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<jats:title>Abstract</jats:title><jats:sec>
<jats:title>Background and objectives</jats:title>
<jats:p>The outcomes of patients with atypical subtrochanteric fractures (ASFs) remain unclear. Data from a large international geriatric trauma registry were analysed to examine the outcome of patients with ASFs compared to patients with typical osteoporotic subtrochanteric fractures (TSFs).</jats:p>
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<jats:title>Materials and methods</jats:title>
<jats:p>Data from the Registry for Geriatric Trauma of the German Trauma Society (Deutsche Gesellschaft für Unfallchirurgie [DGU]) (ATR-DGU) were analysed. All patients treated surgically for ASFs or TSFs were included in this analysis. Across both fracture types, a paired matching approach was conducted, where statistical twins were formed based on background characteristics sex, age, American Society of Anesthesiologists (ASA) score and walking ability. In-house mortality and mortality rates at the 120-day follow-up, as well as mobility at 7 and 120 days, the reoperation rate, hospital discharge management, the hospital readmission rate at the 120-day follow-up, health-related quality of life, type of surgical treatment and anti-osteoporotic therapy at 7 and 120 days, were assessed as outcome measures using a multivariate logistic regression analysis.</jats:p>
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<jats:title>Results</jats:title>
<jats:p>Amongst the 1,800 included patients, 1,781 had TSFs and 19 had ASFs. Logistic regression analysis revealed that patients with ASFs were more often treated with closed intramedullary nailing (RR = 3.59, <jats:italic>p</jats:italic> < 0.001) and had a higher probability of vitamin D supplementation as osteoporosis therapy at 120 days (RR = 0.88, <jats:italic>p</jats:italic> < 0.002). Patients with ASFs were also more likely to live at home after surgery (RR = 1.43, <jats:italic>p</jats:italic> < 0.001), and they also tended to continue living at home more often than patients with TSFs (RR = 1.33, <jats:italic>p</jats:italic> < 0.001). Accordingly, patients with TSFs had a higher relative risk of losing their self-sufficient living status, as indicated by increased rates of patients living at home preoperatively and being discharged to nursing homes (RR = 0.19, <jats:italic>p</jats:italic> < 0.001) or other hospitals (RR = 0.00, <jats:italic>p</jats:italic> < 0.001) postoperatively.</jats:p>
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<jats:title>Conclusions</jats:title>
<jats:p>Surgical treatment of ASFs was marked by more frequent use of closed intramedullary fracture reduction. Furthermore, patients with ASFs were more likely to be discharged home and died significantly less often in the given timeframe. The rate of perioperative complications, as indicated by nonsignificant reoperation rates, as well as patient walking abilities during the follow-up period, remained unaffected.</jats:p>
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