Cross-cultural adaptation and psychometric testing of the Dutch and German versions of the Evaluation of Daily Activity Questionnaire in people with rheumatoid arthritis

Hammond, A; Meesters, J; Niedermann, K; Tennant, A; Vliet Vlieland, T; Tyson, SF; Nordenskiold, U

Abstract

The Evaluation of Daily Activity Questionnaire (EDAQ) is a detailed patient-reported outcome measure of activity ability.
The objective of this research was to assess the linguistic and cross-cultural validity and psychometric properties of the
EDAQ in rheumatoid arthritis for Dutch and German speakers. The EDAQ was translated into Dutch and German using
standard methods. A total of 415 participants (Dutch n = 252; German n = 163) completed two questionnaires about four
weeks apart. The first included the EDAQ, Health Assessment Questionnaire (HAQ) and 36-item Short-Form v2 (SF-36v2)
and the second, the EDAQ only. We examined construct validity using Rasch analysis for the two components (Self-Care
and Mobility) of the Dutch and German EDAQ. Language invariance was also tested from the English version. We examined
internal consistency, concurrent and discriminant validity and test–retest reliability in the 14 EDAQ domains. The Self-Care
and Mobility components satisfied Rasch model requirements for fit, unidimensionality and invariance by language. Internal
consistency for all 14 domains was mostly good to excellent (Cronbach’s alpha ≥ 0.80). Concurrent validity was mostly
strong: HAQ rs = 0.65–0.87; SF36v2 rs = − 0.61 to − 0.87. Test–retest reliability was excellent [ICC (2,1) = 0.77–0.97]. The
EDAQ has good reliability and validity in both languages. The Dutch and German versions of the EDAQ can be used as a
measure of daily activity in practice and research in the Netherlands and German- speaking countries.

Citation

Hammond, A., Meesters, J., Niedermann, K., Tennant, A., Vliet Vlieland, T., Tyson, S., & Nordenskiold, U. (2021). Cross-cultural adaptation and psychometric testing of the Dutch and German versions of the Evaluation of Daily Activity Questionnaire in people with rheumatoid arthritis. Rheumatology International, 41(5), 951-964. https://doi.org/10.1007/s00296-020-04657-7

• Journal Article Type: Article
• Acceptance Date: Jul 19, 2020
• Online Publication Date: Jul 26, 2020
• Publication Date: May 1, 2021
• Deposit Date: Jul 27, 2020
• Publicly Available Date: Jul 27, 2020
• Journal: Rheumatology International
• Print ISSN: 0172-8172
• Electronic ISSN: 1437-160X
• Publisher: Springer Verlag
• Volume: 41
• Issue: 5
• Pages: 951-964
• DOI: https://doi.org/10.1007/s00296-020-04657-7
• Publisher URL: https://doi.org/10.1007/s00296-020-04657-7
• Related Public URLs: http://link.springer.com/journal/296
• Additional Information: Additional Information : The EDAQ, EDAQ-D, EDAQ-NL and EDAQ Manualv3 are available for free download from the University of Salford Institutional Repository: http://usir.salford.ac.uk/id/eprint/30752 ; and/46269/46275/and/46276.; Access Information : Open Access; Projects : Development of a Dutch and German version of the Evaluation of Daily Activities Questionnaire (EDAQ) for use in Rheumatoid Arthritis (RA).