title: The prevalence and risk factors of OAB in middle-aged and old people in China.
abstract: OBJECTIVE
  To evaluate the prevalence of associated risk factors of over active bladder (OAB) in people ≥40 years old in mainland of China.
  
  
  METHODS
  A randomized community-based, cross-sectional study was performed on 10,160 residents (≥40 years old) in the mainland of China using a questionnaire. The overactive bladder symptom score (OABSS) was filled upon site. The chi-square test was used to determine the differences of prevalence between sex, age groups, body mass index (BMI) and people with and without diabetes mellitus (DM).
  
  
  RESULTS
  A total of 9,805 (96.5%) subjects qualified for the final statistical analysis. The overall prevalence of OAB was 2.1% (209/9,805), of whom 1.0% had OABdry and 1.1% had OABwet . The prevalence of OAB was more common in men than in women over the age of 60 (4.6% vs. 2.6%, P < 0.05). The prevalence of OAB in subjects with DM was significantly higher than those without DM in patients with BMI ≥ 25 (P < 0.05). The subjects with a BMI over 29 were more likely to have OAB (3.2% vs. 1.8%, P < 0.05).
  
  
  CONCLUSIONS
  In this population, the prevalence of OAB increased with age for both sexes, but was higher for males over 60 years of age. The study also showed that diabetics with BMI ≥ 25 and people suffering from obesity are more likely to have OAB.
authors.affiliation: Urodynamic Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Department of Urology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China; Institute of Clinical Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
authors.forename: Jian G
authors.initials: JG
authors.lastname: Wen
authors.forename: Jin S
authors.initials: JS
authors.lastname: Li
authors.forename: Zhi M
authors.initials: ZM
authors.lastname: Wang
authors.forename: Chen X
authors.initials: CX
authors.lastname: Huang
authors.forename: Xiao P
authors.initials: XP
authors.lastname: Shang
authors.forename: Zhi Q
authors.initials: ZQ
authors.lastname: Su
authors.forename: Yu T
authors.initials: YT
authors.lastname: Lu
authors.forename: Zhen H
authors.initials: ZH
authors.lastname: Suo
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Gui J
authors.initials: GJ
authors.lastname: Qin
authors.forename: Wei X
authors.initials: WX
authors.lastname: Zhang
authors.forename: John P
authors.initials: JP
authors.lastname: Heesakkers
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D048909:Diabetes Complications / Q000453:epidemiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D012737:Sex Factors; D053201:Urinary Bladder, Overactive / Q000453:epidemiology*
keywords: OAB; OABSS; diabetes mellitus; epidemiology; old people