Underactive bladder as defined by the International Continence Society in the 2023 Japan Community Health Survey

Objective To investigate the characteristics of underactive bladder (UAB) in participants of the 2023 Japan Community Health Survey (JaCS 2023). Methods The JaCS 2023 was conducted among individuals aged 20–99 years old who had anonymously registered with a Japanese online research company. We divided the 6210 participants of JACS 2023 into UAB and non‐UAB groups as defined by the International Continence Society Working Group (ICS‐WG) and evaluated the prevalence of UAB as well as concomitant lower urinary tract symptoms. In addition, an association between UAB and vulnerability‐related factors, namely participants' characteristics including frailty and comorbidities, was explored by univariable and multivariable analyses. Results The prevalence of UAB in Japanese community‐dwelling men and women aged 20 years or older was 9.3% and 4.0% overall (p