Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Childhood obesity may contribute to later onset of puberty for boys

02.02.2010
U-M study finds increased body fat in boys may predict later onset of puberty

Increasing rates of obese and overweight children in the United States may be contributing to a later onset of puberty in boys, say researchers at the University of Michigan.

In a new study published in the February issue of the Archives of Pediatrics and Adolescent Medicine, researchers show that a higher body mass index during early and mid-childhood for boys is associated with later onset of puberty. This is one of the first longitudinal studies in the U.S. to examine the association between weight status and timing of puberty in boys.

“We found that increased body fatness is associated with a later onset of puberty in boys, the opposite of what we have seen in girls, as heavier girls tend to develop earlier, rather than later. Our study shows that the relationship between body fat and timing of puberty is not the same in boys as it is in girls,” says U-M pediatric endocrinologist Joyce M. Lee, M.D., M.P.H. and the study’s lead author.

With childhood obesity rates more than doubling in the U.S. during the past two decades, it has become increasingly important to better understand the ways in which excess body fat can impact children’s growth and development, she adds.

“Although there have been a number of longitudinal studies looking at the link between body fat and puberty in girls, few studies have been performed in boys. The results of our study suggest that excess weight may lead to a later onset of puberty in boys. Our findings have important implications for understanding sex differences in physiological mechanisms of puberty,” says Lee, assistant professor in the Department of Pediatrics and Communicable Diseases.

To study the association between weight and the onset of puberty, Lee and her colleagues looked at 401 boys from diverse socioeconomic backgrounds in 10 regions of the U.S. using data from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development. The study recruited full-term singleton children born in 1991 in 10 geographic areas and measured their height and weight from ages 2 to 12 years.

The study examined children’s body mass index (BMI) trajectories, which is the way children’s body fatness changes over the course of childhood. Children were divided into low, intermediate, and high body mass index (BMI) trajectories. Children in the low group were on the thinner side throughout childhood, while children in the high group were on the heavier side. Of boys in the low BMI trajectory group (91 boys), 7 percent had later onset of puberty. Of boys in the intermediate BMI trajectory group (196 boys), 13.3 percent had later onset of puberty. Of boys in the high BMI trajectory group (114 boys), 14 percent had later onset of puberty.

Puberty was measured by Tanner genitalia staging. There are five stages of puberty in the Tanner scale, which looks at testicular and penis growth. Boys who were in Stage 1, defined as a lack of genital development by 11 ½ years of age, were defined as having later onset of puberty.

“Given the recent childhood obesity epidemic, additional studies are needed to further investigate the epidemiological link between fat and pubertal initiation and progression in boys as well as physiological mechanisms responsible,” Lee says.

In addition to Lee, co-authors are Danielle Appugliese, M.P.H., of the Boston University School of Public Health; Niko Kaciroti, Ph.D., and Julie C. Lumeng, M.D., of the University of Michigan; Robert F. Corwyn, Ph.D., of the University of Arkansas, and Robert H. Bradley, Ph.D., of Arizona State University.

The study was funded by grants from the National Institute of Child Health and Human Development and the American Heart Association.

Journal reference: ArchPediatrAdolescMed. 2010;164(2):1-6

Written by Margarita Bauza-Wagerson

Margarita Bauza-Wagerson | University of Michigan
Further information:
http://www.umich.edu

Further reports about: BMI End User Development Human vaccine body fat body mass health services

More articles from Health and Medicine:

nachricht Hot cars can hit deadly temperatures in as little as one hour
24.05.2018 | Arizona State University

nachricht 3D images of cancer cells in the body: Medical physicists from Halle present new method
16.05.2018 | Martin-Luther-Universität Halle-Wittenberg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>