Association of age at menarche with cardiovascular risk factors, vascular structure, and function in adulthood: the Cardiovascular Risk in Young Finns study.
BACKGROUND
It is unclear whether age at menarche is an independent determinant of future cardiovascular risk.


OBJECTIVE
We aimed to determine whether menarcheal age is an independent predictor of body mass index (BMI) and a wide range of cardiovascular risk factors in adolescence and adulthood.


METHODS
We examined the associations of menarcheal age with BMI (in kg/m(2)) and other cardiovascular risk factors in adolescence and adulthood in a population-based sample of 794 female adolescents aged 9-18 y at baseline. Their age at first menstruation was requested at baseline and again 3 and 6 y later. Cardiovascular risk factors were assessed at baseline and at age 30-39 y.


RESULTS
A 1-y decrease in menarcheal age was associated with 0.81 (95% CI: 0.53, 1.08) higher adult BMI as well as greater waist circumference and waist-to-hip ratio, elevated systolic blood pressure, higher insulin resistance, and greater risk of metabolic syndrome (P < 0.05 for all). In multivariable analysis in which these adult risk factors were mutually adjusted for, only the inverse association between age at menarche and adult BMI remained. However, this inverse association was lost after adjustment for premenarcheal BMI (beta: -0.16; 95% CI -0.55, 0.23; P = 0.42). Higher premenarcheal BMI predicted earlier menarche, and the strong association between premenarcheal BMI and adult BMI was robust to adjustment for age at menarche.


CONCLUSIONS
These findings suggest that early menarche is only a risk marker. Greater childhood BMI seems to contribute to earlier age at menarche and, because of tracking, greater adult BMI and associated cardiovascular risk. An independent effect of early menarche on adult adiposity cannot be excluded, but it is likely to be small at best.
Department of Epidemiology and Public Health, University College London, London, United Kingdom. m.kivimaki@ucl.ac.uk
Mika
M
Kivimäki
Debbie A
DA
Lawlor
George Davey
GD
Smith
Marko
M
Elovainio
Markus
M
Jokela
Liisa
L
Keltikangas-Järvinen
Jussi
J
Vahtera
Leena
L
Taittonen
Markus
M
Juonala
Jorma S A
JS
Viikari
Olli T
OT
Raitakari
D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D001724:Birth Weight; D001794:Blood Pressure; D001827:Body Height; D015992:Body Mass Index; D002318:Cardiovascular Diseases / Q000453:epidemiology*; D002648:Child; D005260:Female; D005387:Finland / Q000453:epidemiology; D005500:Follow-Up Studies; D006801:Humans; D008572:Menarche / Q000502:physiology*; D008598:Menstruation; D015999:Multivariate Analysis; D050177:Overweight / Q000150:complications; D012307:Risk Factors