A reliable, valid instrument to assess patient knowledge about urinary incontinence and pelvic organ prolapse

The objective of this study is to develop a reliable, validated questionnaire to assess patient knowledge about urinary incontinence (UI) and pelvic organ prolapse (POP). We designed a written questionnaire comprised of UI and POP scales and administered it to 133 gynecologic and 61 urogynecologic patients. We performed a principal components factor analysis for UI and POP items and assessed construct validity, internal consistency, and stability of each scale. For both scales, mean total urogynecologic group scores exceeded those for gynecologic patients (P values < 0.001), suggesting construct validity. Both scales had excellent internal consistency (Cronbach's alpha > 0.8). Mean test scores were slightly higher upon retest (UI, 0.46, P = 0.046; POP, 0.33, P = 0.126). Pearson's correlation between initial and repeat scores was high for UI (0.675) and POP scales (0.940), indicating questionnaire stability. We developed a reliable, valid instrument for assessing patient knowledge about UI and POP.