Featured Research

from universities, journals, and other organizations

Duration of breastfeeding during infancy does not reduce a child's risk of being overweight, obese, study finds

Date:
March 12, 2013
Source:
The JAMA Network Journals
Summary:
In research that included nearly 14,000 healthy infants in Belarus, an intervention that succeeded in improving the duration and exclusivity of breastfeeding during infancy did not result in a lower risk of overweight or obesity among the children at age 11.5 years, according to a new study.

In research that included nearly 14,000 healthy infants in Belarus, an intervention that succeeded in improving the duration and exclusivity of breastfeeding during infancy did not result in a lower risk of overweight or obesity among the children at age 11.5 years, according to a study appearing in the March 13 issue of JAMA.

Observational studies suggest that greater duration and exclusivity of having been breastfed reduces child obesity risk. "However, breastfeeding and growth are socially patterned in many settings," and observed associations between these variables are at least partly explained by confounding factors, according to background information in the article.

Richard M. Martin, Ph.D., of the University of Bristol, England, and colleagues investigated the effects of an intervention to promote increased duration and exclusivity of breastfeeding on child adiposity (body fat) and circulating insulin-like growth factor 1 (IGF-1), which regulates growth. The randomized controlled trial was conducted in 31 Belarusian maternity hospitals and their affiliated clinics. Participants were randomized into 1 of 2 groups: breastfeeding promotion intervention or usual practices. Participants were 17,046 breastfeeding mother-infant pairs enrolled in 1996 and 1997, of whom 13,879 (81.4 percent) were followed up between January 2008 and December 2010 at a median (midpoint) age of 11.5 years. The breastfeeding promotion intervention was modeled on the WHO/UNICEF Baby-Friendly Hospital Initiative (World Health Organization/United Nations Children's Fund). The main outcome measures were body mass index (BMI), fat and fat-free mass indices (FMI and FFMI), percent body fat, waist circumference, triceps and subscapular skinfold thicknesses, overweight and obesity, and whole-blood IGF-1.

As previously reported, the researchers found that infants in the intervention group had substantially increased breastfeeding duration and exclusivity vs. the control group: at 3 months, exclusively (43.3 percent vs. 6.4 percent) and predominantly (51.9 vs. 28.3 percent) breastfed; at 6 months, both exclusive (7.9 percent vs. 0.6 percent) and predominant breastfeeding (10.6 percent vs. 1.6) were lower, but more common in the intervention group; and at 12 months, 19.7 percent (intervention) vs. 11.4 percent (control), were still breastfeeding to any degree.

At followup, when children were a median 11.5 years age, there were no significant differences between the experimental vs. control groups for the main outcomes, with the cluster-adjusted mean [average] differences of 0.19 (95 percent CI, -0.09 to 0.46) for BMI; 0.12 for FMI; 0.04 for FFMI; 0.47 percent for percent body fat; 0.30 cm for waist circumference; -0.07 mm for triceps and -0.02 mm for subscapular skinfold thicknesses; and -0.02 standard deviations for IGF-1.

The cluster-adjusted odds ratio for overweight/obesity (BMI ≥85th vs. <85th percentile) was 1.18 (95 percent CI, 1.01 to 1.39) and for obesity (BMI ≥95th vs. <85th percentile) was 1.17 (95 percent CI, 0.97 to 1.41).

"Among healthy term infants in Belarus, an intervention to improve the duration and exclusivity of infant breastfeeding did not prevent overweight or obesity, nor did it affect IGF-1 levels among these children when they were aged 11.5 years. Nevertheless, breastfeeding has many health advantages for the offspring, including beneficial effects demonstrated by our PROBIT trial on gastrointestinal infections and atopic eczema in infancy and improved cognitive development at age 6.5 years. Although breastfeeding is unlikely to stem the current obesity epidemic, its other advantages are amply sufficient to justify continued public health efforts to promote, protect, and support it," the researchers conclude.


Story Source:

The above story is based on materials provided by The JAMA Network Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Martin RM, Patel R, Kramer MS, et al. Effects of Promoting Longer-term and Exclusive Breastfeeding on Adiposity and Insulin-like Growth Factor-I at Age 11.5 Years: A Randomized Trial. JAMA, 2013; 309 (10): 1005-1013 DOI: 10.1001/jama.2013.167

Cite This Page:

The JAMA Network Journals. "Duration of breastfeeding during infancy does not reduce a child's risk of being overweight, obese, study finds." ScienceDaily. ScienceDaily, 12 March 2013. <www.sciencedaily.com/releases/2013/03/130312161151.htm>.
The JAMA Network Journals. (2013, March 12). Duration of breastfeeding during infancy does not reduce a child's risk of being overweight, obese, study finds. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2013/03/130312161151.htm
The JAMA Network Journals. "Duration of breastfeeding during infancy does not reduce a child's risk of being overweight, obese, study finds." ScienceDaily. www.sciencedaily.com/releases/2013/03/130312161151.htm (accessed April 20, 2014).

Share This



More Health & Medicine News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nine-Month-Old Baby Can't Open His Mouth

Nine-Month-Old Baby Can't Open His Mouth

Newsy (Apr. 19, 2014) Nine-month-old Wyatt Scott was born with a rare disorder called congenital trismus, which prevents him from opening his mouth. Video provided by Newsy
Powered by NewsLook.com
'Holy Grail' Of Weight Loss? New Find Could Be It

'Holy Grail' Of Weight Loss? New Find Could Be It

Newsy (Apr. 18, 2014) In a potential breakthrough for future obesity treatments, scientists have used MRI scans to pinpoint brown fat in a living adult for the first time. Video provided by Newsy
Powered by NewsLook.com
Little Progress Made In Fighting Food Poisoning, CDC Says

Little Progress Made In Fighting Food Poisoning, CDC Says

Newsy (Apr. 18, 2014) A new report shows rates of two foodborne infections increased in the U.S. in recent years, while salmonella actually dropped 9 percent. Video provided by Newsy
Powered by NewsLook.com
Scientists Create Stem Cells From Adult Skin Cells

Scientists Create Stem Cells From Adult Skin Cells

Newsy (Apr. 17, 2014) The breakthrough could mean a cure for some serious diseases and even the possibility of human cloning, but it's all still a way off. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins