Spanish Version of the Broome Pelvic Muscle Self-Efficacy Scale: Validity and Reliability

Abstract

Background Self-efficacy appears to be an important predictor of functional recovery for women with urinary incontinence, but no specific Spanish-language questionnaires for measuring pelvic-floor exercise self-efficacy exist. Objective The aim of this study was to design a valid and reliable Spanish version of the Broome Pelvic Muscle Self-Efficacy Scale to measure self-efficacy, as perceived by women with urinary incontinence, in performing pelvic-floor exercises. Design This was an observational validation study. Methods Translation-back translation was used to design the survey, and then the survey was validated with a sample of 119 women who were incontinent and had undergone a pelvic-floor exercise training program. The reliability and construct validity of the questionnaire were assessed. Descriptive statistics were used to score the questionnaire. Internal consistency was evaluated with the Cronbach alpha coefficient and the Pearson correlation coefficient. Exploratory factor analysis with both the principal components extraction method and the varimax rotation method was used to assess construct validity. Results The reliability coefficient (Cronbach alpha=.91) and the correlations among items were high. The factor analysis revealed that 6 main factors accounted for 75.8% of the variance. Limitations Conclusions regarding the validity of the questionnaire should be drawn with caution because of the inability to assess criterion-related validity. Conclusions The Spanish version of the Broome questionnaire for self-efficacy appears to be useful as a measuring tool for a psychometrically accurate, clinically relevant estimation of women's self-efficacy in performing pelvic-floor exercises.