Session Title: Quality Measures and Quality of Care - ARHP Poster
Session Type: ACR Poster Session A
Session Time: 9:00AM-11:00AM
Methods: Patients in 7 European countries completed the AAQ on a computer. Ordinal logistic regression analysis was used to evaluate DIF across languages (Dutch versus 6 other languages). DIF is defined as follows: if a patient in a country has the same level of activity limitation as a patient in the Netherlands (the reference country in which the AAQ is developed), he/she should score the same on each item of the AAQ. If there is a statistical significant difference between countries, there is DIF. Construct validity was assessed by testing correlations between the AAQ and a Patient Reported Outcome Measures (PROM) and performance-based tests. Analyses were adjusted for sex, age, weight, height, and affected joint. The influence of each individual item with DIF on the total score was calculated by means of comparing the correlation between AAQ score with and without the DIF item. A Spearman’s correlation of 0.95 or less was interpreted as important influence of the DIF of that item on the total AAQ score.
Results: Data of 1239 patients were available. Compared to Dutch (n=279), none of the 17 items showed DIF in English (n=202), French (n=193), 1 item showed uniform DIF in Spanish (n=99) and Norwegian (n=62), and 2 items showed uniform DIF in Danish (n=201). For Italian (n=203) versus Dutch however, 6 items showed uniform DIF, and 1 item showed non-uniform DIF, indicating some problems with the cross-cultural validity between these countries. In all the languages, the occurrence of DIF did not influence the total score with correlations of 0.98-0.99 in comparing AAQ scores with and without DIF item(s). All the translated versions remain comparable with the original Dutch version. With regard to construct validity, the correlations with PROM (0.74) and performance-based tests (0.36-0.68) were partly as expected (> 0.60).
Conclusion: The AAQ, a new construct 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 languages.
To cite this abstract in AMA style:Peter W, de Vet H, Boers M, Harlaar J, Roorda LD, Poolman R, Scholtes V, Steultjens MPM, Hendry G, Roos EM, Guillemin F, Benedetti MG, Cavazutti L, Escobar Martinez A, Dagfinrud H, Terwee C. Cross-Cultural and Construct Validity of the Animated Activity Questionnaire to Assess Activity Limitations in Patients with Hip and Knee Osteoarthritis in Different Languages [abstract]. Arthritis Rheumatol. 2016; 68 (suppl 10). https://acrabstracts.org/abstract/cross-cultural-and-construct-validity-of-the-animated-activity-questionnaire-to-assess-activity-limitations-in-patients-with-hip-and-knee-osteoarthritis-in-different-languages/. Accessed October 20, 2020.
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ACR Meeting Abstracts - https://acrabstracts.org/abstract/cross-cultural-and-construct-validity-of-the-animated-activity-questionnaire-to-assess-activity-limitations-in-patients-with-hip-and-knee-osteoarthritis-in-different-languages/