Sorry, But Childhood Obesity Hasn’t Budged in the Past Ten Years


Remember that CDC study showing a dramatic drop in obesity among 2-5 year olds that I wrote about last month? I was skeptical that it was real, and today Sharon Begley of Reuters follows up. Her conclusion? The whole thing is almost certainly bogus:

The latest study is based a well-respected data set taken from the National Health and Nutrition Examination Survey, or NHANES….The 2011-2012 version of the survey included 9,120 people; 871 of them were 2 to 5 years old….”In small samples like this, you are going to have chance fluctuations,” said epidemiologist Geoffrey Kabat of the Albert Einstein College of Medicine in New York City.

….A study of preschoolers in the federal WIC (Women, Infants and Children) program, which provides food vouchers, nutrition classes and counseling to low-income families, found virtually no change in obesity rates….”We agree there is a slight downward trend in obesity among 2-to-5-year olds,” said Shannon Whaley, a co-author of the WIC study. “But a 43 percent drop is absolutely not what we’re seeing.” The WIC study included more than 200,000 children

….Other studies also raise questions about the 40 percent claim. An earlier CDC study, reported in JAMA in December 2012, found that the prevalence of obesity among 2-to-4-year olds in low-income families fell to 14.9 percent in 2010 from 15.2 percent in 2003. That represents an improvement of less than 2 [percent].

….For obesity rates to drop, researchers reckon, young children have to eat differently and become more active. But research shows little sign of such changes among 2-to-5-year olds, casting more doubt on the 43 percent claim….In 2010 Whaley and her colleagues examined the effectiveness of WIC classes and counseling to encourage healthy eating and activities for women and children in the program. Their findings were discouraging: Television watching and consumption of sweet or salty snacks actually rose, while fruit and vegetable consumption fell — changes that could lead to weight gain. One positive was a rise in physical activity.

To recap: the CDC study was small and had large error bars; other, larger studies find only slight drops in obesity; and there’s no indication of any behavioral changes that might have produced a dramatic weight loss. I’d add to that the fact that the CDC data showed no correlation between lower weight at ages 2-5 and lower weight a few years later at ages 6-11.

Bottom line: I hate to be such a buzzkill, but the CDC result seems highly likely to be nothing more than statistical noise. Childhood obesity has barely budged in the last decade.

LET’S TALK ABOUT OPTIMISM FOR A CHANGE

Democracy and journalism are in crisis mode—and have been for a while. So how about doing something different?

Mother Jones did. We just merged with the Center for Investigative Reporting, bringing the radio show Reveal, the documentary film team CIR Studios, and Mother Jones together as one bigger, bolder investigative journalism nonprofit.

And this is the first time we’re asking you to support the new organization we’re building. In “Less Dreading, More Doing,” we lay it all out for you: why we merged, how we’re stronger together, why we’re optimistic about the work ahead, and why we need to raise the First $500,000 in online donations by June 22.

It won’t be easy. There are many exciting new things to share with you, but spoiler: Wiggle room in our budget is not among them. We can’t afford missing these goals. We need this to be a big one. Falling flat would be utterly devastating right now.

A First $500,000 donation of $500, $50, or $5 would mean the world to us—a signal that you believe in the power of independent investigative reporting like we do. And whether you can pitch in or not, we have a free Strengthen Journalism sticker for you so you can help us spread the word and make the most of this huge moment.

payment methods

LET’S TALK ABOUT OPTIMISM FOR A CHANGE

Democracy and journalism are in crisis mode—and have been for a while. So how about doing something different?

Mother Jones did. We just merged with the Center for Investigative Reporting, bringing the radio show Reveal, the documentary film team CIR Studios, and Mother Jones together as one bigger, bolder investigative journalism nonprofit.

And this is the first time we’re asking you to support the new organization we’re building. In “Less Dreading, More Doing,” we lay it all out for you: why we merged, how we’re stronger together, why we’re optimistic about the work ahead, and why we need to raise the First $500,000 in online donations by June 22.

It won’t be easy. There are many exciting new things to share with you, but spoiler: Wiggle room in our budget is not among them. We can’t afford missing these goals. We need this to be a big one. Falling flat would be utterly devastating right now.

A First $500,000 donation of $500, $50, or $5 would mean the world to us—a signal that you believe in the power of independent investigative reporting like we do. And whether you can pitch in or not, we have a free Strengthen Journalism sticker for you so you can help us spread the word and make the most of this huge moment.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate