Body mass index and timing of pubertal initiation in boys

Joyce M. Lee, Niko Kaciroti, Danielle Appugliese, Robert F. Corwyn, Robert Bradley, Julie C. Lumeng

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

Objective: To examine the association between body mass index (BMI [calculated as weight in kilograms divided by height in meters squared]) and timing of pubertal onset in a population-based sample of US boys. Design: Longitudinal prospective study. Setting: Ten US sites that participated in the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development. Participants: Of 705 boys initially enrolled in the study, information about height and weight measures and pubertal stage by age 11.5 years was available for 401 boys. Main Exposure: The BMI trajectory created from measured heights and weights at ages 2, 3, 4.5, 7, 9, 9.5, 10.5, and 11.5 years. Main Outcome Measure: Onset of puberty at age 11.5 years as measured by Tanner genitalia staging. Results: Boys in the highest BMI trajectory (mean BMI z score at age 11.5 years, 1.84) had a greater relative risk of being prepubertal compared with boys in the lowest BMI trajectory (mean BMI z score at age 11.5 years, -0.76) (adjusted relative risk=2.63; 95% confidence interval, 1.05-6.61; P=.04). Conclusions: The relationship between body fat and timing of pubertal onset is not the same in boys as it is in girls. Further studies are needed to better understand the physiological link between body fat and timing of pubertal onset in both sexes.

Original languageEnglish (US)
Pages (from-to)139-144
Number of pages6
JournalArchives of Pediatrics and Adolescent Medicine
Volume164
Issue number2
DOIs
StatePublished - Feb 2010

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Body Mass Index
Weights and Measures
Adipose Tissue
National Institute of Child Health and Human Development (U.S.)
Genitalia
Puberty
Child Care
Age of Onset
Longitudinal Studies
Outcome Assessment (Health Care)
Prospective Studies
Confidence Intervals
Population

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

Cite this

Body mass index and timing of pubertal initiation in boys. / Lee, Joyce M.; Kaciroti, Niko; Appugliese, Danielle; Corwyn, Robert F.; Bradley, Robert; Lumeng, Julie C.

In: Archives of Pediatrics and Adolescent Medicine, Vol. 164, No. 2, 02.2010, p. 139-144.

Research output: Contribution to journalArticle

Lee, Joyce M. ; Kaciroti, Niko ; Appugliese, Danielle ; Corwyn, Robert F. ; Bradley, Robert ; Lumeng, Julie C. / Body mass index and timing of pubertal initiation in boys. In: Archives of Pediatrics and Adolescent Medicine. 2010 ; Vol. 164, No. 2. pp. 139-144.
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