Validation of the Six-item Female Sexual Function Index in Middle-Aged Brazilian Women

Abstract

Objective To validate the six-item female sexual function index (FSFI-6) in middle-aged Brazilian women.

Methods Cross-sectional observational study, involving 737 (premenopausal n = 117, perimenopausal n = 249, postmenopausal n = 371) Brazilian sexually active women, aged between 40 and 55 years, not using hormonal contraceptive methods. The Brazilian FSFI-6 was developed from the translation and cultural adaptation of the Portuguese FSFI-6 version. The participants completed a general questionnaire, the FSFI-6, and the menopause rating scale (MRS). The validation was performed by AMOS 16.0 software (SPSS, Inc., Chicago, IL, USA) for a confirmatory factor analysis (CFA). The chi-square of degrees of freedom (χ2/df), the comparative fit index (CFI), the Tucker-Lewis index (TLI) and the root-mean-square error of approximation (RMSEA) were used as indices of goodness of fit. Cronbach α coefficient was used for internal consistency.

Results The process of cultural adaptation has not altered the Brazilian FSFI-6, as compared with the original content. The CFA for the FSFI-6 score showed an acceptable fit (χ2/df = 3.434, CFI = 0.990, TLI = 0.980, RMSEA = 0.058, 90% confidence interval (90%CI) = 0.033–0.083, p ≤ 0.001) and a good reliability was established in FSFI-6 and MRS (Cronbach α = 0.840 and = 0.854, respectively). In addition, 53.5% of the sample had low sexual function.

Conclusion The FSFI-6 was translated and adapted to the Brazilian culture and is a consistent and reliable tool for female sexual dysfunction screening in Brazilian middle-aged women.

Resumo

Objetivo Validar o Índice de Função Sexual Feminina - 6 itens (FSFI-6, na sigla em inglês) para mulheres brasileiras de meia-idade.

Métodos Estudo transversal observacional que incluiu 737 (pré-menopausa n = 117, perimenopausa n = 249, pós-menopausa n = 371) mulheres brasileiras sexualmente ativas, entre 40 e 55 anos, sem métodos contraceptivos hormonais. A versão brasileira do FSFI-6 foi desenvolvida através da tradução e adaptação cultural da versão portuguesa do questionário. As participantes preencheram um questionário com dados gerais, o FSFI-6 e a escala de avaliação da menopausa (menopause rating scale [MRS]). A validação do instrumento se deu através de análise fatorial confirmatória (CFA, na sigla em inglês), realizada pelo software AMOS 16.0 (SPSS, Inc., Chicago, IL, EUA). Qui-quadrado sobre graus de liberdade (χ2/df), índice de ajuste comparativo (CFI, na sigla em inglês), índice de Tucker-Lewis (TLI) e raiz média dos quadrados dos erros de aproximação (RMSEA, na sigla em inglês) foram utilizados como índices de adequação de ajustes. O coeficiente alfa de Cronbach foi utilizado para avaliar a consistência interna.

Resultados O processo de adaptação cultural não alterou a versão brasileira do FSFI-6, comparado ao conteúdo original. O CFA para o escore do FSFI-6 demonstrou ajuste aceitável (χ2/df = 3,434; CFI = 0,990; TLI = 0,980; RMSEA = 0,058; 90% IC = 0,033 a 0,083; p ≤ 0,001). Demonstrou-se boa confiabilidade entre FSFI-6 e MRS (alfa de Cronbach = 0,840 e = 0,854, respectivamente). Do total, 53,5% da amostra apresentou baixa função sexual.

Conclusão O FSFI-6 foi traduzido e adaptado culturalmente, e é uma ferramenta consistente e confiável no rastreamento de disfunções sexuais em mulheres brasileiras de meia-idade.

Keywords

climacteric - cross cultural comparison - menopause - test reliability - female sexual health

Palavras-chave

climatério - comparação transcultural - menopausa - reprodutibilidade dos testes - saúde sexual da mulher

Contributors

All authors listed above participated in the study to a significant extent. Mona Lúcia Dall'Agno, Charles Francisco Ferreira, Fernanda Vargas Ferreira, Faustino Ramón Pérez-López, and Maria Celeste Osório Wender worked on the conception, design, data collection, analysis and interpretation of the data, writing of the initial manuscript, and critical review of the final manuscript. All authors read and approved the submitted manuscript.

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