Reliability and Validity of WHOQOL-BREF into Indonesian Version as a Measure of Quality of Life of Tuberculosis Patients

Tuberculosis is one of the infectious disease as a public health problem in Indonesia. Tuberculosis causes high pain, disability, and a high level of death. This causes the quality of life of Tuberculosis patients. The WHOQOL-BREF is a special instrument which was widely used to measure the patients’ quality of life. The objective of this study was to assess thevalidity and reliability the Indonesian version of WHOQOLBREF for measuring quality of life of Tuberculosispatients. A descriptive cross-sectional design with 30 subjects was conducted at Duren Sawit Public Health Center, East Jakarta, DKI Jakarta, Indonesia. Data collection was carried out on 11 to 15 of July 2017. The validation process included internal consistency, discriminant validity and construct validity. All of the domains met the reliability criteria (Cronbach-α was ≥0.6). The results showed the r table value>0.361 and the value of Cronbach's Alpha=0.880. The score distribution of each domain from WHOQOL-BREF is symmetrical and there is no floor or ceiling effect. Internal consistency, discriminantand construct validity shows good results from the fourth domain score.

Conclusions: The Indonesian version of WHOQOL-BREF is a valid and reliable questionnaire for measuring the quality of life of Tuberculosis patients.