EP8.84 Establishing Crosswalks Between the Patient Reported Outcomes Measurement Information System and Legacy Patient Reported Outcome Measures in Patients Undergoing Hip Arthroscopy

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ID: 331140
2026
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Abstract
Abstract Background Numerous patient-reported outcome measures (PROMs) assess clinical improvement after hip arthroscopy for femoroacetabular impingement syndrome (FAIS). The Patient-Reported Outcomes Information System Physical Function Computer Adaptive Test (PROMIS-PF CAT), based on item response theory, reduces survey burden. However, limited interchangeability with legacy PROMs restricts comparisons and longitudinal analyses. This study aimed to develop statistical crosswalks between PROMIS-PF CAT and legacy instruments using observed-score equating. Methods A prospectively maintained database was queried for patients undergoing primary hip arthroscopy for FAIS. Inclusion required completion of PROMIS-PF CAT and at least one legacy PROM at the same visit: 12-item International Hip Outcome Tool (iHOT-12), Hip Outcome Score Activities of Daily Living (HOS-ADL), Hip Outcome Score Sports-Specific Subscale (HOS-SS), Modified Harris Hip Score (mHHS), Short Form-12 Physical Component Score (SF-12 PCS), or Veterans RAND 12-Item Physical Component Score (VR-12 PCS). Equating models were used to link PROMIS to legacy PROMs. Model performance was evaluated using intraclass correlation coefficients (ICC), standard error (SE), and root mean square error (RMSE). Final models generated crosswalk tables for bidirectional conversion. Results A total of 2,173 patients were included (age: 33.6±13.4, 1,485 (68.4%) females, BMI: 26.1±5.7). Patients completed the PROMIS-PF CAT 6,395 times. Of these, 5,871 were completed concomitantly with iHOT-12 and HOS-ADL, 5,656 with HOS-SS, 916 with mHHS, and 498 with SF-12 and VR-12, respectively. Models produced by the equipercentile method had the best performance based on SE (0.47-1.04) and RMSE (0.47-12.3). ICC between predicted scores based on crosswalk tables and actual scores within the population ranged from 0.72 to 0.82. The median score of 50 on the PF CAT equated to the following scores on legacy instruments: 84 (iHOT-12), 92 (HOS-ADL), 82 (HOS-SS), 80 (mHHS), 50 (SF-12 PCS), and 52 (VR12 PCS), respectively. Sensitivity analysis identified a sole decrease in ICC for interconversion to iHOT-12 among male patients, suggesting possible gender-based domain mismatch. Conclusion The successful development and validation of crosswalk tables enable bidirectional conversion between PROMIS-PF CAT and commonly used legacy PROMs, improving comparability and facilitating longitudinal outcome analysis in both geographical and temporally distinct hip arthroscopy patient populations.
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Authors Yining Lu, Jack Yang, Ty Monty, Kyle N. Kunze, Joseph Brinkman, Shane Nho
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.463
URL
https://doi.org/10.1093/jhps/hnag043.463
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