title: Urinary incontinence and age at the first and last delivery: the Norwegian HUNT/EPINCONT study.
abstract: OBJECTIVE
  This study was undertaken to investigate the association between maternal age at the first and last delivery, and urinary incontinence later in life.
  
  
  METHODS
  In the Norwegian EPINCONT study (a substudy of HUNT 2), cross-sectional data on incontinence from 11,397 women aged 20 to 64 years was linked with prospectively obtained data on exposures from the Medical Birth Registry of Norway. Bivariate and multivariate methods were applied.
  
  
  RESULTS
  Women 25 years or younger at their first delivery had a lower risk of incontinence than their older counterparts (23% vs 28%, P < .01). No significant effect of maternal age at the first delivery was found in women with actual age 50 to 64 years. Adjusting for confounders did not change any results. Age at the last delivery was less associated with incontinence.
  
  
  CONCLUSIONS
  Being older than 25 years at the first delivery was associated with incontinence. The effect attenuated with actual age.
authors.affiliation: Section for General Practice, Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway.
authors.forename: Guri
authors.initials: G
authors.lastname: Rortveit
authors.forename: Steinar
authors.initials: S
authors.lastname: Hunskaar
mesh_terms: D000328:Adult; D015986:Confounding Factors, Epidemiologic; D003430:Cross-Sectional Studies; D036861:Delivery, Obstetric / Q000706:statistics & numerical data*; D015987:Effect Modifier, Epidemiologic; D006801:Humans; D016015:Logistic Models; D008423:Maternal Age; D008875:Middle Aged; D016017:Odds Ratio; D015995:Prevalence; D012307:Risk Factors; D014549:Urinary Incontinence / Q000453:epidemiology*