@article {Leung1547, author = {Ying Ying Leung and William Tillett and Pil Hojgaard and Ana-Maria Orbai and Richard Holland and Ashish J. Mathew and Niti Goel and Jeffrey Chau and Christine A. Lindsay and Alexis Ogdie and Laura C. Coates and Robin Christensen and Philip J. Mease and Vibeke Strand and Dafna D. Gladman}, title = {Test-retest Reliability for HAQ-DI and SF-36 PF for the Measurement of Physical Function in Psoriatic Arthritis}, volume = {48}, number = {10}, pages = {1547--1551}, year = {2021}, doi = {10.3899/jrheum.210175}, publisher = {The Journal of Rheumatology}, abstract = {Objective. Due to no existing data, we aimed to derive evidence to support test-retest reliability for the Health Assessment Questionnaire{\textendash}Disability Index (HAQ-DI) and 36-item Short Form Health Survey physical functioning domain (SF-36 PF) in psoriatic arthritis (PsA).Methods. We identified datasets that collected relevant data for test-retest reliability for HAQ-DI and SF-36 PF, and evaluated them using Outcome Measures in Rheumatology (OMERACT) Filter 2.1 methodology. We calculated intraclass correlation coefficients (ICC) as a measure of test-retest reliability. We then conducted a quality assessment and evaluated the adequacy of test-retest reliability performance.Results. Two datasets were identified for HAQ-DI and 1 for SF-36 PF in PsA. The quality of the datasets was good. The ICCs for HAQ-DI were good and excellent in study 1 (0.90, 95\% CI 0.79{\textendash}0.95) and study 2 (0.94, 95\% CI 0.89{\textendash}0.97). The ICC for SF-36 PF was excellent (0.96, 95\% CI 0.92{\textendash}0.98). The performance of test-retest reliability for both instruments was judged to be adequate.Conclusion. The new data derived support good and reasonable test-retest reliability for HAQ-DI and SF-36 PF in PsA.}, issn = {0315-162X}, URL = {https://www.jrheum.org/content/48/10/1547}, eprint = {https://www.jrheum.org/content/48/10/1547.full.pdf}, journal = {The Journal of Rheumatology} }