Abstract
To determine the responsiveness of Patient-Report Outcome Measurement Information System (PROMIS) compared to legacy patient reported outcome measures (PROMs) in patients undergoing hip arthroscopy for femoroacetabular impingement syndrome (FAIS) at 6-month follow-up. Data from consecutive patients who underwent primary hip arthroscopy between August 2018 and January 2019 for the treatment of FAIS were analyzed. Baseline data including demographics, pre- and 6 months post-operative outcomes were recorded. Computer adapted testing (CAT) was used to administer PROMIS Physical Function (PROMIS-PF), PROMIS Pain Interference, and PROMIS Depression outcome measures. 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 (iHOT12). Responsiveness of each PRO tool was evaluated by calculating effect size (ES) and relative efficiency (RE). An effect size ≥0.80 was considered large. Ninety-six patients with an average age and BMI of 32.4±11.9 years and 25.9±6.1 kg/m2 respectively had completed outcome measures at 6 months and were included in the final analysis. Except for PROMIS Depression (ES=0.04), the effect size was large for all outcome measures including PROMIS Pain Interference (ES=0.96), PROMIS-PF (ES=0.96), HOS-ADL (ES=1.29), HOS-SS (ES=1.06), and iHOT12 (ES=1.87). PROMIS-PF was less responsive than the legacy PROMs with RE of 0.55, 0.93, and 0.24 for HOS-ADL, HOS-SS, and iHOT12 respectively. HOS-SS had a similar efficiency against the other legacy PROMs with REs of 0.59 and 0.26 for HOS-ADL and iHOT12. The iHOT12 was the most responsive outcome measure compared to PROMIS Pain Interference (RE=3.95), PROMIS-PF (RE=4.13), HOS-ADL (RE=2.26), and HOS-SS (RE=3.84). In patients at 6 months post-operative from hip arthroscopy for FAIS, iHOT12 was the most responsive in reference to pre-operative outcomes and PROMIS PF had a lower effect size compared to legacy hip specific PROMs. In addition, responsiveness of PROMIS-PF correlated well with the responsiveness of HOS-SS.
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