EP1.10 Can 6-Month Patient-Reported Outcomes Predict 5-Year Results After Combined Hip Arthroscopy and Periacetabular Osteotomy in Dysplastic Patients?
Abstract
Abstract Background Early predictions of long-term outcomes are critical for guiding patient counseling and postoperative management. While short-term patient-reported outcomes (PROs) are routinely collected, their ability to predict long-term results remains unclear. This study investigates whether 6-month PROs can reliably predict 5-year outcomes in dysplastic patients undergoing combined hip arthroscopy and periacetabular osteotomy (PAO). Methods A retrospective review was conducted on patients who underwent combined hip arthroscopy and PAO for hip dysplasia at a single institution with a minimum follow-up of five years. Data collection included patients’ demographics and PROs including the Non-Arthritic Hip Score (NAHS), collected preoperatively, at six months, and at five years postoperatively. Pre- and postoperative PROs were compared and the minimal clinically important difference (MCID) threshold was defined as 7.2 for the NAHS, based on previously published values. The association between achieving MCID at six months and at five years was assessed using the Phi (φ) correlation coefficient and the positive predictive value (PPV), with statistical significance set at p < 0.05. Results A total of 82 patients met inclusion criteria (mean age 33.5 ± 9.4 years; 95.3% female). Significant improvements were observed in NAHS from preoperative baseline to both 6 months and 5 years postoperatively (57.5 vs. 79.7 vs. 76.8, respectively; p < 0.01). MCID was achieved in 75.9% of patients at 6 months and 64.8% at 5 years, with a strong correlation between time points (φ = 0.64) and a positive predictive value of 83%. Conclusion Six-month clinical outcomes show a strong correlation with mid-term (5-year) outcomes following combined hip arthroscopy and PAO for hip dysplasia. These findings suggest that early patient-reported outcomes not only reflect short-term recovery but also serve as reliable predictors of longer-term success, providing valuable information for postoperative patients counseling, reassurance, and expectation management.