Childhood Obesity Is Still Going Up, Up, Up

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Hey, do you remember that breathless CDC study from a couple of years ago showing a dramatic drop in obesity among 2-5-year-olds? I was pretty skeptical about it, and today I learn that I was right to be. I basically figured that it was a noisy sample that didn’t make sense, but according to a new look at the data it’s worse than that: the data is noisy, and that allowed the CDC researchers to cherry pick a starting point that made it look like there was a huge drop.

Roberto Ferdman provides a new chart based on the new study. Take a look. If you start in 2003, as the CDC study did, it looks like there’s a big drop. The prevalence of obesity among girls goes down 2.1 percentage points, and among boys it goes down a whopping 6.1 percentage points.

But if you include data going back to 1999, which is the true beginning of this data series, the improvement is distinctly more modest: a drop of 1.1 percentage points for girls and 1.7 percentage points for boys. And those drops aren’t even statistically significant.

The original study was always suspect because the alleged drop for 2-5-year-olds wasn’t matched in any other age group. And sure enough, a fresh look at the rest of the data continues to show rising obesity for every other age group. Suddenly the results for 2-5-year-olds look perfectly in sync.

It’s one thing if this newer study shows different results because it includes 2013-14 data. But deliberately excluding the starting point of the data series is the real culprit, and that’s inexcusable. The authors of the original study have some explaining to do.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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