Short-term outcomes of curved periacetabular osteotomy and factors influencing patient dissatisfaction

This study aimed to evaluate clinical outcomes based on patient-reported outcome measures and to analyze factors influencing patient dissatisfaction at 1 year after curved periacetabular osteotomy (CPO). This retrospective review involved 98 hips of 98 consecutive patients with symptomatic acetabular dysplasia who underwent CPO from March 2016 to June 2020. The clinical outcomes were evaluated based on the Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire, the Medical Outcomes Study 36-Item Short-Form Health Survey and the Harris Hip Score. Patients were divided into satisfied and unsatisfied groups according to the 85th percentile cut-off on the postoperative visual analog scale (VAS) for dissatisfaction. A multiple logistic regression analysis was performed to investigate the factors impacting patient dissatisfaction after CPO; the explanatory variables were age, body mass index, postoperative Tönnis grade of ≥2, postoperative VAS score for pain, lateral femoral cutaneous nerve (LFCN) injury and radiographic complications (non-union of the pubis, non-union of the ischium after posterior column fracture and ischial ramus stress fracture). The 85th percentile of the postoperative VAS score for dissatisfaction was 60 mm. The unsatisfied group comprised 15 patients at 1 year after CPO. The multiple logistic regression analysis results showed that the postoperative VAS scores for pain [odds ratio (OR), 1.064; 95% confidence interval (CI), 1.026–1.104; P = 0.001] and LFCN injury (OR, 6.775; 95% CI, 1.308–33.256; P = 0.018) were associated with postoperative dissatisfaction. LFCN injury and the postoperative VAS score for pain independently impacted postoperative dissatisfaction at 1 year after CPO.