TY - JOUR T1 - Test-retest reliability for HAQ-DI and SF-36 PF for the measurement of physical function in psoriatic arthritis JF - The Journal of Rheumatology JO - J Rheumatol DO - 10.3899/jrheum.210175 SP - jrheum.210175 AU - Ying Ying Leung AU - William Tillett AU - Pil Hojgaard AU - Ana-Maria Orbai AU - Richard Holland AU - Ashish J. Mathew AU - Niti Goel AU - Jeffrey Chau AU - Chris Lindsay AU - Alexis Ogdie AU - Laura C. Coates AU - Robin Christensen AU - Philip Mease AU - Vibeke Strand AU - Dafna D. Gladman Y1 - 2021/04/15 UR - http://www.jrheum.org/content/early/2021/04/10/jrheum.210175.abstract N2 - Objective Due to no existing data, we aimed to derive evidence to support test-retest reliability for the Health Assessment Questionnaire-Disability Index (HAQ-DI) and Medical Outcome Survey Short-Form-36 item 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 OMERACT Filter 2.1 methodology. We calculated intra-class 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 one for SF-36 PF in PsA. The quality of the datasets was good. The ICCs for HAQ-DI were excellent in both datasets: 0.94 (95% CI: 0.88 to 0.97) and 0.94 (95% CI: 0.89 to 0.97). The ICC of SF-36 PF was good (0.89, 95% CI: 0.76 to 0.95). 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. ER -