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Updated: May 13, 2026

Real-Time Void Spot Assay
Published on: February 10, 2023
Prevalence of lower urinary tract symptoms in middle-aged and elderly Japanese
Yoko Osuga1, Kikuo Okamura, Fujiko Ando
1Division of Urology, Department of Surgery and Intensive Care, National Center for Geriatrics and Gerontology, Obu, Japan.
Aims:
To estimate the prevalence of lower urinary tract symptoms (LUTS) in Japanese people, and the relationships to aging and sex, we carried out the present population-based study.
Methods:
The present study included 1198 men aged 60.7 ± 12.5 years and 1218 women aged 60.8 ± 12.7 years who participated in a study of aging carried out at the National Center for Geriatrics and Gerontology between 2006 and 2008, using linguistically validated versions of the International Prostate Symptom Score (I-PSS) and International Consultation on Incontinence Questionnaire Short-form (ICIQ-SF).
Results:
The prevalence of I-PSS ≥ 8 was 25.2% in men and 11.8% in women, that of two or more a week urinary incontinence was 3.3% and 6.6%, respectively, and that of I-PSS ≥ 8 and/or two or more a week urinary incontinence was 25.8% and 16.0%, respectively. The prevalence of the seven symptoms in I-PSS increased with aging. Just 9.1% of men and 4.6% of women who reported LUTS were medicated for LUTS.
Conclusions:
The results showed that the severity of LUTS in Japan was related to aging. The prevalence of LUTS with I-PSS ≥ 8 in Japan is similar to that in other countries.
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