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1 Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU 2 Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU 3 unknown 4 Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU
Objective To develop an Animated Activity Questionnaire (AAQ), based on video animations, for assessing activity limitations in patients with hip/knee osteoarthritis (OA), which combines the advantages of self-reported questionnaires and performance-based tests, without many of their limitations, and to preliminary assess its reliability and validity. We hypothesize that the AAQ correlates highly with performance-based tests, and moderately with self-reports. Methods Item selection was based on 1) the pilot AAQ; 2) pre-specified conditions; 3) the International Classification of Functioning core set for OA, 4) existing measurement instruments, and 5) focus groups of patients. Test-retest reliability was assessed in 30/110 patients. In 110 patients correlations were calculated between AAQ and self-reported Hip disability and Knee injury Osteoarthritis Outcome ADL subscale (H/KOOS). In 45/110 patients correlations with performance-based tests (Stair Climbing Test , Timed Up and Go test, 30 second Chair Stand Test ) were calculated. Results 17 basic daily activities were chosen for the AAQ. Video animations were made showing a person performing each activity with 3 to 5 different levels of difficulty. Patients were asked to select the level that best matched their own performance. Reliability was high (Intraclass Correlation Coefficient 0.97 (CI 0.93-0.98)). The AAQ correlated highly with performance-based tests (0.62), but higher with H/KOOS ADL (0.76) than expected. Conclusions A computerized AAQ for assessing activity limitations was developed. Content validity was considered good. Preliminary validation results showed high reliability, but construct validity needs further study with larger sample size. Continuing research will focus on construct validity and cross-cultural validity. © 2014 American College of Rheumatology.
Arthritis Care and Research, 2015, Vol 67, Issue 1
Main Research Area: