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- Wouter Schuller, Caroline B Terwee, Berend Terluin, Daphne C Rohrich, OsteloRaymond W J GRWJGDepartment of Health Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands; Department of Epidemiology and Data Science, Amsterdam UMC location Vrije Universiteit & Amsterdam Movement Sciences, Musculoskeletal Health, A, and de VetHenrica C WHCWAmsterdam UMC location Vrije Universiteit, Epidemiology and Data Science, Amsterdam, The Netherlands; Amsterdam Public Health Research Institute, Methodology, Amsterdam, The Netherlands..
- Amsterdam UMC location Vrije Universiteit, Epidemiology and Data Science, Amsterdam, The Netherlands; Amsterdam Public Health Research Institute, Methodology, Amsterdam, The Netherlands; Spine Clinic, Zaandam, The Netherlands. Electronic address: w.schuller@amsterdamumc.nl.
- J Pain. 2023 Mar 1; 24 (3): 530539530-539.
AbstractWe evaluated the responsiveness of the Patient Reported Outcome Information System Pain Interference item bank in patients with musculoskeletal pain by testing predefined hypotheses about the relationship between the change scores on the item bank, change scores on legacy instruments and Global Ratings of Change (GRoC), and we estimated Minimal Important Change (MIC). Patients answered the full Dutch-Flemish V1.1 item bank. From the responses we derived scores for the standard 8-item short form (SF8a) and a CAT-score was simulated. Correlations between the change scores on the item bank, GRoC and legacy instruments were calculated, together with Effect Sizes, Standardized Response Means, and Area Under the Curve. GRoC were used as an anchor for estimating the MIC with (adjusted) predictive modeling. Of 1,677 patients answering baseline questionnaires 960 completed follow-up questionnaires at 3 months. The item bank correlated moderately high with the GRoC (Spearman's rho 0.63) and with the legacy instruments (Pearson's R ranging from .45 to .68). It showed a high ES (.97) and Standardized Response Means (.71), and could distinguish well between improved and not improved patients based on the GRoC (Area Under the Curve .77). Comparable results were found for the derived SF8a and CAT-scores. The MIC was estimated to be 3.2 (CI 2.6-3.7) T-score points. PERSPECTIVE: Our study supports the responsiveness of the PROMIS-PI item bank in patients with musculoskeletal complaints. Almost all predefined hypotheses were met (94%). The PROMIS-PI item bank correlated well with several legacy instruments which supports generic use of the item bank. MIC for PROMIS-PI was estimated to be 3.2 T-score points.Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.
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