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Titre du document / Document title

Interpreting the continued decline in the average age at menarche : Results from two nationally representative surveys of U.S. girls studied 10 years apart

Auteur(s) / Author(s)

ANDERSON Sarah E. ; MUST Aviva ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Gerald j. and Dorothy R. Friedman School of Nutrition Science and Technology and the Department of Public Health and Family Medicine, Tufts University, Boston, Massachusetts, ETATS-UNIS

Résumé / Abstract

Objectives To determine whether average age at menarche declined in the United States during the past decade, and whether associations between menarcheal timing, weight status, and race/ethnicity changed. Study design Relative weight, race/ethnicity, and menarcheal status of girls (n = 1577) in the National Health and Nutrition Examination Survey (NHANES) III (1988-1994) were compared with those of girls (n = 1720) in NHANES 1999-2002. Probit analysis estimated average age at menarche overall and also by race/ethnicity. Logistic regression assessed associations of relative weight and race/ethnicity with menarcheal status. Results In the United States, average age at menarche declined from 12.53 years (95% confidence interval [CI] = 12.43 to 12.63 years) in 1988-1994 to 12.34 years (95% CI = 12.24 to 12.45 years) in 1999-2002. By race/ethnicity, average age at menarche estimates were as follows: non-Hispanic whites, 12.57 years (95% CI = 12.45 to 12.69 years) and 12.52 years (95% CI = 12.38 to 12.67 years); non-Hispanic blacks, 12.09 years (95% CI = 11.82 to 12.36 years) and 12.06 years (95% CI = 11.81 to 12.32 years); and Mexican Americans, 12.24 years (95% CI = 11.88 to 12.59 years) and 12.09 years (95% CI = 11.81 to 12.37 years). Higher relative weight was consistently associated with increased likelihood of having reached menarche. Conclusions Average age at menarche in the United States declined by 2.3 months between 1988-1994 and 1999-2002; by race/ethnicity, declines were considerably smaller. Changes in the population distribution of race/ethnicity and relative weight should be considered when interpreting trends in age at menarche.

Revue / Journal Title

The Journal of pediatrics    ISSN  0022-3476   CODEN JOPDAB 

Source / Source

2005, vol. 147, no6, pp. 753-760 [8 page(s) (article)] (43 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Maryland Heights, MO, ETATS-UNIS  (1932) (Revue)

Mots-clés anglais / English Keywords

Human

;

Pediatrics

;

Female

;

Child

;

Surveillance

;

Survey

;

Result

;

Puberty

;

Menstrual cycle

;

Development

;

Menarche

;

Age

;

Average

;

Mots-clés français / French Keywords

Homme

;

Ménarche

;

Pédiatrie

;

Femelle

;

Enfant

;

Surveillance

;

Enquête

;

Résultat

;

Puberté

;

Cycle menstruel

;

Développement

;

Première menstruation

;

Age

;

Moyenne

;

Mots-clés espagnols / Spanish Keywords

Hombre

;

Pediatría

;

Hembra

;

Niño

;

Vigilancia

;

Encuesta

;

Resultado

;

Pubertad

;

Ciclo menstrual

;

Desarrollo

;

Menarquia

;

Edad

;

Promedio

;

Localisation / Location

INIST-CNRS, Cote INIST : 2061, 35400013458238.0110

Nº notice refdoc (ud4) : 17367244



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