title: Prevalence of syncope in a population aged more than 45 years.
abstract: OBJECTIVE
  Our current understanding of the prevalence of syncope is based on a few small studies of highly selected populations. We sought to estimate the prevalence and recurrence rate of syncope in the general population aged more than 45 years and to analyze their associations with age and sex.
  
  
  METHODS
  We performed a cross-sectional survey of 1925 randomly selected residents of Olmsted County, Minn, 45 years or older, from January 1998 to August 2000.
  
  
  RESULTS
  The median age of the 1925 participants was 62 years, and 905 (47.0%) were male. Overall, 364 subjects reported an episode of syncope in their lifetime, giving an estimated prevalence of 19% (95% confidence interval, 17%-21%). The age-specific prevalence rates were 45 to 54 years (20%), 55 to 64 years (20%), 65 to 74 years (15%), and 75 years or more (21%) (P = .86). Females reported a higher prevalence of syncope (22% vs 15%, P < .001).
  
  
  CONCLUSIONS
  The prevalence of syncope is estimated at 19% in the general population aged more than 45 years. Females have a higher prevalence, and there is no association of syncope prevalence with age.
authors.affiliation: Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, Minn 55905, USA. chen.lin@mayo.edu
authors.forename: Lin Y
authors.initials: LY
authors.lastname: Chen
authors.forename: Win-Kuang
authors.initials: WK
authors.lastname: Shen
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Mahoney
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Jacobsen
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Rodeheffer
mesh_terms: D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D013575:Syncope / Q000453:epidemiology*