Patient-Reported Outcomes Measurement Information System Physical Function Has a Lower Effect Size and is Less Responsive Than Legacy Hip Specific Patient Reported Outcome Measures Following Arthroscopic Hip Surgery.

PURPOSE

To compare the use and responsiveness of Patient Reported Outcomes Measurement Information System (PROMIS) to legacy patient-reported outcome measures (PROMs) in patients undergoing hip arthroscopy for femoroacetabular impingement syndrome (FAIS) at 6-month follow-up.

METHODS

Data from patients who underwent primary hip arthroscopy with routine capsular closure between August 2018 and January 2019 for the treatment of FAIS were analyzed. Preoperative outcomes, 6-month postoperative outcomes, and demographics were recorded. Primary outcome measures included PROMIS Physical Function (PROMIS-PF), PROMIS Pain Interference (PROMIS-PI), and PROMIS Depression. The legacy PROMs included Hip Outcome Score Activities of Daily Living (HOS-ADL), Hip Outcome Score Sport Subscale (HOS-SS), and the international hip outcome tool 12 questions (iHOT-12). Floor and ceiling effects along with the responsiveness and Cohen's d effect size of each PROM tool were calculated.

RESULTS

Ninety-six patients with an average age and body mass index of 32.4 ± 11.9 years and 25.9 ± 6.1 kg/m, respectively, were included in the final analysis. All outcomes were significantly higher at 6 months compared with the preoperative level (P < .001) except for PROMIS Depression (P = .873). PROMIS-PF demonstrated excellent correlation with HOS-SS (r = 0.81; P < .001), very good correlation with HOS-ADL (r = 0.73; P < .001), and good correlation with iHOT-12 (r = 0.68; P < .001). No floor was observed for any measure. The effect size was large for all outcomes, except PROMIS Depression (d = 0.04), but largest for iHOT12 (d = 1.87) followed by HOS-ADL (d = 1.29). The iHOT-12 was more responsive than PROMIS-PI (relative efficiency [RE] = 3.95), PROMIS-PF (RE = 4.13), HOS-ADL (RE = 2.26), and HOS-SS (RE = 3.84). HOS-SS was similarly responsive to PROMIS-PI (RE=1.03) and PROMIS-PF (RE=1.08). However, PROMIS-PF was overall the least responsive.

CONCLUSIONS

In patients at 6 months postoperatively from hip arthroscopy for FAIS, iHOT-12 was the most responsive and had the largest effect size. In contrast, PROMIS-PF had a lower effect size compared with legacy hip-specific PROMs. Additionally, PROMIS-PF did not correlate as well with iHOT-12 compared with HOS-SS.

LEVEL OF EVIDENCE

Level IV, case series.