Assessing the Validity and Reliability of the Indonesian Version of Patient-Reported Outcomes Measurement Information System (PROMIS) Global Health

Abstract

Abstract Background The assessment of Health-Related Quality of Life (HRQoL) is an essential clinical outcome, focusing on the subjective perception of individuals regarding their health status in the physical, mental, and social dimensions. However, HRQoL assessment in large-scale studies and mass inspections presents various challenges, necessitating the development of non-burdensome instrument. A promising instrument in this context is PROMIS Global Health, a widely used English tool, which requires translation, validation, and cross-cultural testing for non-English populations, such as Indonesia. Therefore, this study aimed to validate and assess the reliability of the Indonesian version of Patient-Reported Outcomes Measurement Information System (PROMIS) Global Health for comprehensive HRQoL assessment. Methods The sample population comprised 343 participants, including patients, caregivers, and residents of Physical Medicine and Rehabilitation. PROMIS Global Health was subjected to translation and cultural adaptation using the Functional Assessment of Chronic Illness Therapy (FACIT) method. Subsequently, the content validity test was carried out using S-CVI assessment of 5 experts, and the internal validity was evaluated with Confirmatory Factor Analysis (CFA). The reliability test was performed with Cronbach's Alpha for internal consistency as well as the test-retest method for external consistency and item discrimination analysis. Results Questions or statements in the Indonesian version of PROMIS Global Health based on S-CVI/Universal Agreement (0.90), χ2/df (1.53), RMSEA (0.04), RMR (0.03), and CFI (0.99). The reliability results showed that Chronbach's Alpha score for Global Physical Health (GPH) and Global Mental Health (GMH) was 0.61 and 0.77, respectively. In addition, the test-retest method showed a good correlation (GPH r = 0.727, p < 0.05; GMH r = 0.701, p < 05) with item analysis factor loading of > 0.3. Conclusion Based on the results, the validity and reliability tests showed that questions or statements in PROMIS Global Health were valid and reliable.