MJM, Vol 70 Supplement 1 September 2015
Cross-cultural adaptation and psychometric
assessment of the World Health Organization Health and Work Performance
Questionnaire among Malay speaking office workers
*Julius Centre University of Malaya, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Malaysia, **Ministry of Health, Malaysia, ***Centre for Occupational and Environmental Health-UM, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, Malaysia
Introduction: The World Health Organization Health and Work Performance Questionnaire (WHO-HPQ) is an instrument commonly used to estimate workplace costs of any health problems among workers arise from lower job performance, sick absenteeism, and accidents and injuries at workplace. This paper report on the translation, adaptation, and validation the Malay-speaking version of the WHO-HPQ.
Methods: The implementation of cross-cultural adaptations was completed according to standard guidelines. Forward and backward translation from English-Malay-English was completed by independent bilingual translators. The translated WHO-HPQ was pre-tested on 20 office workers followed by face-to-face interviews to assess their understanding of the instrument. The face and content validity were verified by consensus obtained from the expert panel on the understanding and relevance of the translated instrument. The psychometric assessment was conducted on 300 office workers through self-administered questionnaire.
Results: Participants were a mix of male (25.3%) and female (74.7%), ranging in age from 20 to 58 years old with a mean age of 33 years old. Based on the psychometric properties assessment, the internal consistency of the Malay version HPQ were adequate (Cronbach’s alpha = 0.78 and mean inter-item correlation = 0.53). Exploratory factor analysis and confirmatory factor analysis suggested that a modification of the Malay version of HPQ provided best fit estimates to the sample data.
Conclusion: The Malay version of HPQ was shown to have adequate reliability and validity as an instrument in the study sample.
Keywords: Cross-cultural adaptation, psychometric assessment, World Health Organization Health and Work Performance Questionnaire, Malaysia