Objective: To validate the Malay version of the Health Assessment Questionnaire (Malay-HAQ) for use in Malay-speaking rheumatoid arthritis (RA) patients in the Malaysian setting. The HAQ – Disability Index has been validated in several languages, but not in Malay.
Methods: The original HAQ was modified and translated into Malay by two translators, one of whom was aware of the objectives of the Questionnaire and the other as a lay translator. Two sets of Malay-HAQ were distributed to RA patients during their routine follow-up visits; one set to be completed immediately and another set to be completed 2 weeks later. A total of 61 patients completed the two sets of Malay-HAQ. The data collected was analysed using SPSS V. 11.0. Reliability of the data was evaluated using the test-retest method and internal consistency was assessed by Cronbach's alpha.
Result: The study showed that the Malay-HAQ is feasible and reliable. The Spearman's correlation coefficient ranged from 0.65 to 0.82, while the internal consistency was 0.88–0.92.
Conclusion: The Malay-HAQ is a sensitive, reliable and valid instrument for the measurement of functional status in RA patients in a Malay setting.