The Psychometric Properties of Indonesian Version of WHO Quality of Life 100 in Tuberculosis Patients

Abstract

Background: Tuberculosis has an impact not only on physical health but also on psychological well-being and economic and social status, as well as causing stigma, which results in a decreased quality of life. Quality of life assessment can improve nurses’ understanding of patients’ burdens, disease processes, and needs during treatment, which will help design appropriate tuberculosis intervention programs. Purpose: This study was to obtain a valid and reliable Indonesian version of the WHOQOL-100 instrument for tuberculosis patients. Methods: This study is a psychometric study. According to the WHO guidelines, the original WHOQOL-100 instrument was translated using a forward and backward procedure. Two hundred and seventy-four tuberculosis patients treated at PMI Bogor Hospital completed the questionnaire. Construct validity was tested using exploratory factor analysis with principal component analysis and varimax rotation, and reliability using Cronbach’s alpha test on the WHOQOL-100 instrument. Results: The number of domains in the WHOQOL-100 instrument is six, the Indonesian version of the factor/facet is 18, and most questions have a loading factor ≥ 0.4. Of the 100 items, 31 were extracted that were related to freedom, physical safety and security, health and social care, participation and opportunities for relaxation activities, physical environment, and transportation. The overall valid question item reliability test results are α = 0.816. Conclusion: This study produced a shorter version of the English version of the WHOQOL-100 instrument, valid and reliable for use in Indonesia.