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Lins-Kusterer L, Aguiar I, Santos-Lins LS, Lins-Rocha M, Aguiar CVN, Menezes MS, Sampaio AS, Quarantini LC, Cotrim HP, Brites C. Validation of the RAND 36-Item Health Survey questionnaire in Brazil. ARQUIVOS DE GASTROENTEROLOGIA 2022; 59:193-197. [PMID: 35830028 DOI: 10.1590/s0004-2803.202202000-36] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/07/2021] [Indexed: 06/15/2023]
Abstract
BACKGROUND Health-related quality of life is frequently used as an outcome measure that improves the quality of care. The SF-36 and RAND-36 were derived from the Medical Outcomes Study. OBJECTIVE The present study aimed to validate the RAND-36 in Brazil, in healthy individuals and patients with liver disease. METHODS Confirmatory factor analysis (CFA) was conducted by using JASP Software. The parameters of the items were estimated using the Robust Diagonally Weighted Least Squares (RDWLS) approach. Comparative fit index (CFI), Goodness-of-fit index (GFI), Tucker-Lewis Index (TLI) and the root mean square error of approximation (RMSEA) were evaluated. Internal consistency was measured using the Composite reliability index. Convergent validity between RAND-36 domains and Work Ability Index (WAI) was conducted. RESULTS This validation study included 763 individuals, 400 (52.4%) with chronic liver disease. The most prevalent liver diseases were hepatitis C (13.9%), alcoholic liver disease (11.8%), and steatosis (12.1%). The measurement model tested using the CFA obtained the following adjustment indicators: X2 (df): 599.65 (498); CFI: 0.998; GFI: 0.998; TLI: 0.998; RMSEA: 0.016 (90%CI: 0.011-.021). Convergent validity of RAND-36 and total WAI ranged from medium to large correlation. CONCLUSION The RAND-36 is effective in measuring the perception of health-related quality of life in individuals with and without chronic liver disease. The results of our study support the developer's claims for the reliability of the RAND-36 version 1 as a measure of health-related quality of life. The evidence for the construct validity of the RAND-36 was substantial.
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Affiliation(s)
- Liliane Lins-Kusterer
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
| | - Inácio Aguiar
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
| | - Larissa Souza Santos-Lins
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
| | - Matheus Lins-Rocha
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
| | | | | | - Aline Santos Sampaio
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria, Salvador, BA, Brasil
| | - Lucas C Quarantini
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
- Universidade Federal da Bahia, Hospital Universitário Professor Edgard Santos, Laboratório de Neuropsicofarmacologia, Serviço de Psiquiatria, Salvador, BA, Brasil
| | - Helma P Cotrim
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
| | - Carlos Brites
- Universidade Federal da Bahia, Faculdade de Medicina da Bahia, Programa de Pós-graduação em Medicina e Saúde, Salvador, BA, Brasil
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