Patients Undergoing Hip Arthroscopy With Concomitant Periacetabular Osteotomy Demonstrate Clinically Meaningful Improvement at 2 Years Using the Patient-Reported Outcome Measurement Information System and International Hip Outcome Tool 12.

PURPOSE: To report the minimal clinically important difference (MCID) and substantial clinical benefit (SCB) values using the Patient-Reported Outcome Measurement Information System (PROMIS) and International Hip Outcome Tool 12 (iHOT-12) in patients undergoing hip arthroscopy (HA) with concomitant periacetabular osteotomy (PAO), HA + PAO for acetabular dysplasia, and intra-articular pathology with a minimum 2-year follow-up.

METHODS

Data from patients who underwent HA + PAO were prospectively collected and retrospectively analyzed. Inclusion criteria consisted of patients who had a diagnosis of hip dysplasia or hip instability and had a minimum 2-year patient-reported outcome measure follow-up. Data were collected electronically preoperatively and postoperatively at 6 months, 1 year, and 2 years. Outcome measures analyzed were the iHOT-12 and PROMIS computer adaptive tests: Physical Function (PF), Pain Interference (PI), and Global Physical Health (GPH). MCID and SCB were calculated for these measures.

RESULTS

In total, 106 patients were included in the study with an average age of 23.5 ± 6.6 years, an average body mass index of 24.3, and the majority being female (94%). The values for MCID were calculated to be 40.9, 40.7, 60.2, and 43.5, and the percentage achieving MCID at 2 years was 82.6%, 82.9%, 79.6%, and 80.1% for the iHOT-12, PROMIS-PF, PROMIS-PI, and PROMIS-GPH respectively. The 1-year and 2-year SCB scores for ≥80% satisfaction and percent achieving were as follows, respectively: iHOT-12, 71.8 (60.3%), 61.9 (65.1%); PROMIS-PF, 47.1 (64.2%), 47.2 (71.7%); PROMIS-PI, 50.6 (48.1%), 52.3 (49.1%); and PROMIS-GPH, 49.3 (54.7%), 49.3 (55.7%). The 1-year and 2-year SCB scores for 100% satisfaction and percent achieving were as follows, respectively: iHOT-12, 80.2 (44.3%), 81.3 (47.2%); PROMIS-PF, 50.7 (46.2%), 50.3 (56.6%); PROMIS-PI, 52.4 (34.9%), 52.4 (49.1%); and PROMIS-GPH, 52.5 (36.8%), 49.3 (55.7%).

CONCLUSIONS

This study reports values for MCID and SCB for PROMIS and iHOT-12 at a 2-year follow-up in patients undergoing HA + PAO for hip dysplasia or instability. The percentage of patients achieving MCID ranged from 79.6% to 82.9% at the 2-year follow-up. In addition, the percentage of patients achieving SCB at the 2-year follow-up for ≥80% satisfaction ranged from 49.1% to 71.2%, and the percentage for 100% satisfaction ranged from 49.1% to 56.6%.

LEVEL OF EVIDENCE: Level IV, therapeutic case series.