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Scott Kahan, M.D.

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Measuring Kids BMIs Is Good Practice

Posted: 09/23/11 11:07 AM ET

My initial reaction to last week's announcement of a new Michigan policy to track kids' weight was emotional and negative. Indeed, so many recently publicized policies and prescriptions regarding weight seem to be uninformed and often stigmatizing toward people who have obesity. For example, there have been calls for taxes levied against people with obesity and proposed laws against serving food to people with obesity, not to mention doctors who systematically refuse to treat patients who are heavy.

So when I heard that Gov. Rick Snyder would mandate doctors to report their patients body mass index (BMI), I jumped to the conclusion that this was yet another example of punishing people for their weight in a society that strongly pushes overeating and weight gain.

But let me explain why this is a good public health measure: It's a core, essential step in our approach to the childhood obesity epidemic. That is, as long as it's done right.

Some argue that this is a case of the government legislating what we eat. Not true. This policy simply asks pediatricians to measure and report kids' height and weight to the Michigan public health system, just as they routinely do for other health measures, such as immunizations, certain infections and other health measures.

This is called public health surveillance. It is the first step in the systematic process of understanding public health problems and implementing solutions. Surveillance is information gathering: collecting, analyzing and interpreting data. Without understanding the scope, magnitude, distribution and other facets of the problem, finding appropriate solutions would essentially be just "shooting in the dark."

Some argue it's a bad idea because BMI is an inaccurate measure of body fat. True, BMI doesn't distinguish between fat and muscle, so some muscular people are inappropriately labeled as overweight (and even more thin-appearing people actually have body fat percentages that put them in the overweight range). For many reasons, I don't depend on BMI in my clinical obesity practice.

But in this case, it isn't being used for individual purposes. All the BMI measurements will be tallied and averaged to understand the distributions of weight and height in the population as a whole. For population assessments, BMI is well studied, effective and affordable.

Others believe the policy will stigmatize overweight kids. That's an important consideration, especially given the stigma we have toward obesity in general. But in this case the policy is right on. The BMI data is collected by pediatricians during annual check-ups and reported anonymously to a public health database. This is no different from how we report immunizations or other health measures. It's "public health 101."

In contrast, imagine how this policy could have gone wrong. What if the policy required measurements to be done at schools -- i.e., kids line up in gym class, shirts off, to be weighed. Few things could be more shaming than this. Some policymakers actually think that a nice ancillary benefit would be the inevitable mockery of the fat kids, which might encourage them to lose weight. It wouldn't. I believe it's a fallacy and a tragedy to think that shaming people will motivate them. As is, kids with obesity experience worse emotional quality of life than kids with cancer.

Sure, this won't solve the obesity problem -- it's not supposed to. But it's an initial step in a tried-and-true public health process that will ultimately help us address this health problem over time.

I hope that it leads to other well-meaning and appropriate interventions. While this policy prompts physicians to measure BMIs, it doesn't give them the knowledge and training to productively and empathically partner with patients to manage their weight. I hope that educating physicians about clinical strategies for weight management and health behavior change will soon be a policy priority.

Right now, medical students and residents are taught almost nothing about obesity, nutrition or behavior change counseling. It shows, as doctors are often disrespectful toward patients with obesity, and they admit to having little knowledge to help their patients. I recently created the first-ever course on obesity at the George Washington University School of Medicine. It was very well received by students and the administration, but it should have been a core part of the curriculum years, if not decades, ago. Indeed, it's one of exceedingly few such courses in the country.

For now, this policy is a fine start to help Michigan understand their childhood obesity epidemic and monitor the effect of future obesity measures. If properly implemented, it should be copied by other states. It's just plain good public health practice.

 
 
 

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HUFFPOST SUPER USER
tomteboda
03:58 AM on 09/27/2011
When I was in elementary school, we were all weighed publicly in the gym. My humiliation with my size began at age 7 thanks to the barbaric practice, which brought me under the baleful eye of classmates, and I believe set me up for a life of weight and eating battles completely disconnected from health.
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Scott Kahan, M.D.
07:14 AM on 09/27/2011
Thank you for your comment. I'm so sorry that you had this experience. It's unfortunately not uncommon that we shame kids based on their body weight or other factors, and these experiences can stick with them for a long time. I hope that we are learning to be less stigmatizing toward weight, though it is slow progress. I wish you the best and please feel free to email me if I can help in any way.
Scott Kahan
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Tom Hendricks
see wikipedia
11:36 PM on 09/26/2011
More relevant is to find the cause of obesity and end it. New ideas suggest that breast feeding may be the key to both overweight and underweight problems. The idea is that the lack of at least one year of breast feeding for infants is causing both overweight and underweight problems across the world.

Infants develop a food in pattern with breast feeding, then a waste out pattern with weaning - probably in the ENS, Enteric Nervous System, or digestion brain or gut brain, that subconsciously programs us for our lives. We don't know enough about the ENS but it may be more important to your health then the traditional head brain.

If the child is not breast fed - the infant will be 'hungry' from then on. He will feel like he has to take in excess food just to get the necessary nurturing he was denied as an infant. He will move toward food and become overweight. The overriding emotion is Anger.

This should be easy to test. Those with weight problems should be infants that were NOT breast fed for one year. Google breast milk + obesity for studies, for starters.

"Before 1900, most mothers breastfed their infants. Breastfeeding rates declined sharply worldwide after 1920, when evaporated cow's milk and infant formula became widely available. " - faqs.org
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Ranveig Elvebakk
Innovator, author and lecturer on weight and nutri
03:08 PM on 09/26/2011
It is evidence based that high BMI is unhealthy. That is great, so now we know, but what are the results of this practice? We have collected data and publicly wrung our hands about obesity while it has engulfed us- Show me your money-.
Ranveig Elvebakk, MD, Author "The Food Tree" and "A New Disease Model"
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William Anderson LMHC
Licensed Psychotherapist, Weight Control Expert
10:36 AM on 09/25/2011
Great article, well thought out and right on target with some sensitive issues related to our emotionally vulnerable kids and the childhood obesity epidemic.

I grew up as the fattest kid in school to become a psychotherapist and weight loss expert after discovering how to solve the problem. We need more of your kind of thinking applied to the obesity epidemic.

I am currently working with pediatrician and childhood obesity expert Dr. Robert Pretlow on a new childhood obesity treatment program, and pediatrician Carola Fleener and we welcome your contribution here.

Please read my blog regarding childhood obesity and our community and school response to it, a subject dear to me, having grown up as an obese kid. http://theandersonmethod.com/what-should-the-schools-do-to-fight-the-childhood-obesity-epidemic/

Best wishes,

William Anderson, LMHC
Author of 'The Anderson Method - Secrets of Permanent Weight Loss'
www.TheAndersonMethod.com
11:18 PM on 09/24/2011
There is a lot of misinformation about BMI surveillance in Michigan. Read more about how the system works at altarum.org/obesityresources. The governor did NOT order doctors to report kids' weight to the state. Rather, he ordered the state to ALLOW doctors to report data. The benefit to them and to families is that doctors then get tools to help them counsel children and families about nutrition, etc.

Also, contrary to most reports, the data are NOT shared anonymously with the registry. However, the data in the registry are SECURE and cannont be shared without appropriate permissions and safeguards.
11:14 PM on 09/24/2011
There is a lot of misinformation about what Michigan's BMI surveillance system is about. More specific information can be found in a guide to BMI surveillance: www.altarum.org/obesityresources.

The Governor is not requiring physicians to report children's weight to the state. Rather, he ordered the state to ALLOW doctors to report data if they wish. The value to them is that they will have access to tools to help them do a better job counseling kids about obesity.

Another misconception: When data are reported in the registry, they are NOT reported anonymously. However, the data are SECURE and cannot be shared without appropriate permissions and safeguards.