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Animated activity questionnaire showed good cross-cultural validity in measuring activity limitations
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The animated activity questionnaire, a tool for assessing activity limitations with some aspects of both patient-reported outcome measure and performance-based tests, demonstrated good overall cross-cultural validity, according to recent findings.
Researchers evaluated 1,239 adults with hip and/or knee osteoarthritis based on American College of Rheumatology criteria. Patients were from seven European countries and were asked to complete the animated activity questionnaire (AAQ), which includes videos of 17 basic life activities, such as climbing stairs or walking outside. For these activities, participants were asked to identify the video that best reflected their own performance at this task. They were also offered an “unable to perform” option. Researchers in the participating countries translated this question and scoring instructions into their respective languages.
After completing the AAQ, patients completed a patient-reported outcome measure (PROM) and the activities of daily living (ADL) subscale of the hip disability/knee injury KOOS. In addition, patients were asked to undertake the stair climbing test, the timed up-and-go test and the 30-minute chair stand test.
Researchers found the mean AAQ score was 77 ±18.5, and the mean H/KOOS ADL subscale score was 66 ± 20.5. The mean timed up-and-go test time was 11.3 seconds, the mean stair climbing test time was 17.5 seconds and the mean chair stand test performance was 10.5 sit-to-stands.
The researchers found that compared with the Dutch version, none of the items demonstrated differential item functioning (DIF) in the English language or French. One item demonstrated uniform DIF in Spanish (walking inside, OR: 0.29) and one item in Norwegian (walking inside, OR; 0.16). Compared with the Dutch version of the AAQ, uniform DIF was found in two items in Danish (walking outside on uneven terrain; OR: 0.45) and walking inside (OR:0.43)
The presence of DIF did not impact the total score, which continued to be similar to the original Dutch version. However, some cross-cultural validity problems were identified between Italian vs. Dutch, as evidenced by six items showing uniform DIF and one item showing nonuniform DIF.
Regarding construct validity, the correspondence to PROM and performance-based tests were partly as anticipated.
“The AAQ, an innovative tool to measure activity limitations that can be placed on the continuum between PROMs and performance-based tests, showed a good overall cross-cultural validity, and seems to have great potential for international use in research and daily clinical practice in many European countries,” the researchers wrote. – by Jennifer Byrne
Disclosures: The researchers report no relevant disclosures.
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