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Validation of the RAND 36-Item Health Survey questionnaire in Brazil
Liliane Lins-Kusterer1, Inácio Aguiar1, Larissa Souza Santos-Lins1
1Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil.
Arquivos De Gastroenterologia
|July 13, 2022
Summary
The RAND-36 questionnaire effectively measures health-related quality of life in individuals with and without chronic liver disease in Brazil. This study confirms its reliability and construct validity for diverse populations.
Area of Science:
- Health Outcomes Research
- Psychometrics
- Clinical Epidemiology
Background:
- Health-related quality of life (HRQoL) is a crucial outcome measure for assessing healthcare quality.
- The RAND-36 is a widely used HRQoL instrument derived from the Medical Outcomes Study.
Purpose of the Study:
- To validate the RAND-36 questionnaire in a Brazilian population.
- To assess the RAND-36's utility in both healthy individuals and patients with chronic liver disease.
Main Methods:
- Confirmatory Factor Analysis (CFA) using JASP Software.
- Internal consistency assessed via Composite Reliability Index.
- Convergent validity examined against the Work Ability Index (WAI).
Main Results:
- The study included 763 participants, with 52.4% diagnosed with chronic liver disease.
- CFA yielded excellent model fit indicators (CFI, GFI, TLI > 0.99; RMSEA = 0.016).
- RAND-36 demonstrated medium to large correlations with the WAI, indicating good convergent validity.
Conclusions:
- The RAND-36 is a reliable and valid instrument for measuring HRQoL in Brazilian individuals, including those with chronic liver disease.
- The study provides substantial evidence supporting the construct validity of the RAND-36.
- The findings affirm the RAND-36's effectiveness as a measure of perceived health status.
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