title: Metabolic syndrome and incidence of atrial fibrillation among blacks and whites in the Atherosclerosis Risk in Communities (ARIC) Study.
abstract: BACKGROUND
  The metabolic syndrome (MetSyn) has been implicated in the development of atrial fibrillation (AF); however, knowledge of this association among blacks is limited.
  
  
  METHODS
  We determined the risk of incident AF through December 2005 in relation to baseline (1987-1989) MetSyn status in 15,094 participants of the Atherosclerosis Risk in Communities study.
  
  
  RESULTS
  Over a mean follow-up of 15.4 years, 1,238 incident AF events were identified. The hazard ratio (HR) for AF among individuals with, compared to those without, the MetSyn was 1.67 (95% CI 1.49-1.87), and associations did not differ by race (P for interaction = .73). The population attributable risk of AF from the MetSyn was 22%. The multivariable-adjusted HRs (95% CI) for each MetSyn component were 1.95 (1.72-2.21) (elevated blood pressure), 1.40 (1.23-1.59) (elevated waist circumference), 1.20 (1.06-1.37) (low high-density lipoprotein cholesterol), 1.16 (1.03-1.31) (impaired fasting glucose), and 0.95 (0.84-1.09) (elevated triglycerides). A monotonically increasing risk of AF with increasing number of MetSyn components was observed, with an HR of 4.40 (95% CI 3.25-5.94) for those with all 5 MetSyn components compared to those with 0 components.
  
  
  CONCLUSIONS
  In this large cohort, the MetSyn and most of its components were associated with a higher risk of AF in both blacks and whites. Given the high prevalence of the MetSyn, strategies to prevent its development or to control individual components may reduce the burden of AF.
authors.affiliation: University of Minnesota, Minneapolis, 55454, USA. gram0119@umn.edu
authors.forename: Alanna M
authors.initials: AM
authors.lastname: Chamberlain
authors.forename: Sunil K
authors.initials: SK
authors.lastname: Agarwal
authors.forename: Marietta
authors.initials: M
authors.lastname: Ambrose
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Folsom
authors.forename: Elsayed Z
authors.initials: EZ
authors.lastname: Soliman
authors.forename: Alvaro
authors.initials: A
authors.lastname: Alonso
mesh_terms: D000328:Adult; D001741:Black or African American; D001281:Atrial Fibrillation / Q000453:epidemiology* / Q000208:ethnology; D015897:Comorbidity; D003920:Diabetes Mellitus / Q000453:epidemiology; D003925:Diabetic Angiopathies / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D024821:Metabolic Syndrome / Q000453:epidemiology* / Q000208:ethnology; D008875:Middle Aged; D044465:White People