[Epidemiological study of women adults with mixed urinary incontinence in China]

To investigate the prevalence and the epidemiological factors of female mixed urinary incontinence (MUI) in China.

In February to July 2006, 19 024 subjects aged over 20 years old in 6 Chinese regions including Northwest, Southwest, Northern China, Eastern China, Northeast and South China were selected. Questionnaires were used to investigate the general characters and the lower urinary tract symptoms in these subjects.

The overall prevalence of mixed urinary incontinence was 9.4% among these women and it increased with advancing age. In multiple logistic models, age, vaginal delivery, constipation, pelvic organ prolapse, chronic pelvic pain, respiratory system disease, menstrual disorder, urinary system disease, alcohol consumption, pelvic surgery, obesity as well as high educational level were independent risk factors for mixed urinary incontinence.

The prevalence of MUI increases with advancing age. Vaginal delivery, constipation and pelvic organ prolapse are risk factors for mixed urinary incontinence in China while high educational level is a protective factor.