title: Age at Menarche and Cardiometabolic Risk in Adulthood: The Coronary Artery Risk Development in Young Adults Study.
abstract: OBJECTIVE
  To examine the association of menarche timing with cardiometabolic risk factors into early to mid-adulthood, comparing African American and White women.
  
  
  METHODS
  Analyses included 2583 women (African American = 1333; White = 1250) from the Coronary Artery Risk Development in Young Adults cohort study over 25 years of follow-up (1985-2011). Outcomes included type 2 diabetes, metabolic syndrome, adiposity, glucose, insulin, blood pressure, and blood lipids. Cox models or repeated measures linear regression models estimated the association between age at menarche and the outcomes.
  
  
  RESULTS
  Each 1-year earlier age at menarche was associated with higher mean body mass index among African American (0.88 ± 0.12 kg/m(2), P < .0001) and White (0.89 ± 0.10 kg/m(2), P < .0001) women. After body mass index adjustment, each 1-year earlier age at menarche was associated with higher triglycerides (2.26 ± 0.68 mg/dL, P = .001) and glucose (0.34 ± 0.11 mg/dL, P = .002), and greater risk for incident impaired fasting glucose (hazard ratio = 1.13, 95% CI 1.04-1.20) and metabolic syndrome (hazard ratio 1.19, 95% CI 1.11-1.26) among White women only.
  
  
  CONCLUSIONS
  Excess adiposity associated with earlier menarche is sustained through mid-adulthood, and primarily drives higher cardiometabolic risk factor levels. However, White women with earlier menarche had increased risk of a number of insulin-resistance related conditions independent of adiposity. The cardiometabolic impact of earlier menarche was weaker in African American women despite higher average adiposity. Weight maintenance would likely reduce but may not completely eliminate the elevated cardiometabolic risk of earlier menarche.
authors.affiliation: University of Minnesota, School of Public Health, Minneapolis, MN. Electronic address: gora0001@umn.edu.
authors.forename: Jill
authors.initials: J
authors.lastname: Dreyfus
authors.affiliation: University of Minnesota, School of Public Health, Minneapolis, MN.
authors.forename: David R
authors.initials: DR
authors.lastname: Jacobs
authors.affiliation: Columbia University, Mailman School of Public Health, New York, NY.
authors.forename: Noel
authors.initials: N
authors.lastname: Mueller
authors.affiliation: University of Minnesota, School of Public Health, Minneapolis, MN.
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Schreiner
authors.affiliation: University of Minnesota, School of Public Health, Minneapolis, MN.
authors.forename: Antoinette
authors.initials: A
authors.lastname: Moran
authors.affiliation: Northwestern University, Feinberg School of Medicine, Chicago, IL.
authors.forename: Mercedes R
authors.initials: MR
authors.lastname: Carnethon
authors.affiliation: University of Minnesota, School of Public Health, Minneapolis, MN.
authors.forename: Ellen W
authors.initials: EW
authors.lastname: Demerath
mesh_terms: D050154:Adiposity; D000328:Adult; D001741:Black or African American / Q000706:statistics & numerical data*; D000367:Age Factors; D001786:Blood Glucose; D001794:Blood Pressure; D015992:Body Mass Index; D002318:Cardiovascular Diseases / Q000453:epidemiology*; D015331:Cohort Studies; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D008055:Lipids / Q000097:blood; D008572:Menarche; D024821:Metabolic Syndrome / Q000453:epidemiology*; D008875:Middle Aged; D012307:Risk Factors; D044465:White People / Q000706:statistics & numerical data*; D055815:Young Adult
chemical_list: D001786:Blood Glucose; D008055:Lipids