Posts Tagged ‘BMI’

Effect of sugar-sweetened drinks on small children — not good

October 12, 2013  |  General  |  No Comments

We know that drinking lots of sugary drinks is bad for school-age children. A recent research article in Pediatrics, the journal of the American Academy of Pediatrics, asks a related question: What do we know about these drinks and younger children?

The authors examined the correlation between consumption of sugar-sweetend beverages and body mass index (BMI) in 9,600 children ages 2-5. Children who drank sugar-sweetened beverages for meals and snacks had a higher risk of being obese. Further, two-year-old children who continued to consume these drinks over the next several years had a steadily increasing BMI on average.

There is a good accompanying editorial to the article that reviews what we can or should do about this disturbing trend. The authors conclude:

To date most SSB policy discussion has neglected the youngest children. Isn’t it time to effect meaningful policies and implementation strategies to curb SSB consumption in our youngest children?

I agree.

Bariatric (weight control) surgery for adolescents: is there any place for it?

October 15, 2011  |  General  |  No Comments

It’s well known that an increasing number of Americans are overweight, and many more of those are frankly obese. The reasons are several. We have a more sedentary lifestyle and fewer and fewer of us get regular exercise. Our caloric intake, on average, has been steadily rising for decades, and many of us now eat the same number of calories as a person who a century ago did hard manual labor for 12 hours each day. Evolutionary biologists tell us that, in effect, our metabolism is programmed for how we lived 10,000 years ago, when our ancestors had infrequent, large meals and needed to store energy between them because the interval might be days. Now we have frequent large meals every day. As a result, our caloric balance is slanted toward accumulation, and we get fat.

The statistics for adolescent obesity are discouraging. The Centers for Disease Control says that 17% of our children are now obese, defined as a body mass index (BMI) of greater than 30. Because of the dismal results of traditional behavioral methods of weight contol in adolescents, more than a few experts are urging us to consider the role of weight-control surgery for so-called morbid obesity in children. It seems a bit extreme at first blush, but think about it: what we have to offer medically to these children virtually always fails, and we know that continued morbid obesity is a true threat to their lifes — not just in the long-term, but even in the medium-term. Why not do bariatric surgery on them?

The issue, of course, is what data do we have that this sort of surgery has any better long-term outcome than medical therapy. That is, does it work? Thinking of the risk-benefit ratio, is the short-term risk of surgery (which is not trivial) worth the chances of long-term success? A recent editorial in the New England Journal of Medicine asks that question. The answer is that we don’t know, but we should find out. We should offer the procedure to carefully selected cases, and keep track of how well it works out for them. From the editorial:

Will bariatric surgery in the young prove more effective over time than other less-invasive approaches? Given the health effects of massive obesity, many practitioners believe that weight-loss surgery is a better alternative than watching a morbidly obese youngster develop myriad complications. All adolescents must navigate the journey into adult life, and those who have undergone bariatric surgery will need to adhere to a stringent diet and medication and exercise regimens for the rest of their lives. There may be as-yet-unknown adverse effects of the surgery — for example, effects on bone density over decades. We also have much to learn about why bariatric surgery leads to a recalibration of the weight set point. It appears that bariatric surgery for adolescents has caught on, whether “right” or “wrong.” But the current strict requirements for having a bariatric procedure should not be relaxed until we know more.

Childhood obesity

July 9, 2008  |  General  |  2 Comments

At first glance you might not think childhood obesity has much to do with pediatric critical care, but it does. There are several well-known health risks to an obese child. Many of these, such as type 2 diabetes, high blood pressure, and sleep apnea, were once quite uncommon in children. For example, two decades ago I never saw a child with type 2 diabetes — now I see several each year. Some authorities say one in three children are overweight. Many of us think the ongoing epidemic growth in childhood asthma is partly driven by rising obesity.

For children, what is obesity? After all, children grow and put on weight as they grow. To determine this we use the same measurements as for adults — the body mass index, or BMI. The BMI is your child’s weight in kilograms divided by her height in meters squared (i.e., multiplied times itself). Here is a site that gives easy conversion of pounds and inches to these metric values. For example, a child who is 1.5 meters tall and weighs 50 kg has a BMI of 22 (50/1.5 x 1.5). Here is an even easier way to do it, a BMI calculator. It also has a chart that tells you if your child is at a good weight for age, overweight (BMI at 85th to 94th percentile for age), or obese (BMI greater than the 95th percentile for age).

Why does this matter? Can’t an overweight or obese child just lose the weight later by exercising more and eating less? The answer is that it becomes harder and harder to lose the weight once the child gets to adolescence and beyond. Ingrained lifestyle habits are hard to break. Besides, obesity has heath risks for children now, both physical and psychological. You can read more about them at a very useful National Library of Medicine site here, which also tells you what you can do about it.