Prevalence and impact on generic quality of life of urinary incontinence in Japanese working women: Assessment by ICI questionnaire and SF-36 health survey

Objectives. To examine the prevalence of urinary incontinence (UI) and the relationship between UI and generic quality of life (QOL) in working women. Methods. Of 7229 female hospital nurses in Japan, 3734 (51.7%) responded to a self-administered postal questionnaire that included the Rand Medical Outcomes Study 36-item Health Survey (SF-36) and the International Consultation on Incontinence questionnaire (ICIQ) for evaluating symptoms and health-related QOL. Results. The overall prevalence of UI in Japanese working women aged 20 to 64 years (mean 35.2) was 16.7%. The main type of incontinence was stress UI (73%). Its prevalence increased with age and reached a plateau at age 45 to 49 years (34.7%). The ICIQ score also correlated significantly with age, Generic QOL, especially physical functioning, role-physical, social functioning, and role-emotional, was significantly impaired by UI. A comparison of subjects with and without UI revealed that the differences in the physical and mental component summary scores of the SF-36 were largest in the age groups of 25 to 29 and 55 to 59 years, respectively. The correlations of the ICIQ score with the physical and mental component scores were most significant in the age groups of 25 to 29 and 45 to 49 years, respectively. The impact of mixed UI on QOL showed a greater tendency than that of stress or urge UI. Conclusions. The prevalence of UI showed an age-related increase, with a peak at 45 to 49 years old. The impact of UI on physical health was great in individuals in their 20s, but its impact on mental health increased in the older age groups.