Clinical Outcomes of Total Hip Arthroplasty for Displaced Femoral Neck Fractures in Patients 80 Years of Age and Older Selected by Clinical Frailty Score

Purpose: The utility of total hip arthroplasty (THA) for the treatment of displaced femoral neck fractures in elderly patients (≥80 years of age) remains controversial as a patient’s general condition is an essential factor impacting recovery. This study aims to determine if THA is a valuable option for appropriately selected elderly patients. Materials and Methods: All patients underwent cementless THA using a direct lateral approach with a rectangular stem. Eighty-two patients ≥80 years of age underwent THA due to a displaced femoral neck. Clinical frailty scale (CFS) scores <5 were indicated for THA. The modified Harris hip score (mHHS), visual analogue scale (VAS), and patient satisfaction were used to assess outcomes. Results: Nine of 82 patients died in the study period with another underlying disease. One, a 90-year-old male with pneumonia expired in the intensive care unit at 7-day postoperatively, while the other eight died due to causes unrelated to THA. Of the remaining 73 patients: (i) mean mHHS score increased to 80.57±21.36 at 1-year postoperatively; (ii) VAS was 2.3±0.9 points six-months postoperatively; and (iii) 78.7% of patients reported that they were very satisfied or satisfied 1-year postoperatively. The number of perioperative complications was 10.8% (9 hips) without the need for revision surgery. Conclusion: The use of THA in patients ≥80 years of age with low CFS scores (<5) described here yielded favorable results and a relatively low rate of complications. However, a well-controlled comparative study or randomized trial is required to further refine selection criteria for THA in this patient population.