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The Health Assessment Questionnaire (HAQ) Disability Index is the most frequently used and validated measure of physical function for patients with rheumatoid arthritis (RA).1 Various translated versions of this questionnaire have been used in clinical research in the Netherlands. In 2007, a standardised translation, the Dutch consensus HAQ, was introduced and a letter detailing its development appeared in this journal.2 The Dutch DREAM registry,3 a multicentre observational cohort study that monitors RA patients undergoing different treatment regimens, soon adopted the consensus HAQ.
The consensus HAQ differs in a number of ways from the previously used version that was developed in Nijmegen.4 Differences include the handling and number of aids and the translation of item 13: ‘are you able to reach and get down a 5-pound object (such as …
Footnotes
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Handling editor Tore K Kvien
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Contributors MAHOV drafted the manuscript and performed all analyses. PMTK, HEV, WK, PLCvR and MAFJvdL critically revised the manuscript and contributed to the interpretation of the results. All authors read and approved the final version of the manuscript.
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Competing interests None.
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Ethics approval This study was approved by the ethical review board of hospitals participating in the DREAM registry.
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Provenance and peer review Not commissioned; externally peer reviewed.