adolescence

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Studies: It May Be Better For Kids Who Are Overweight Not To Know It

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According to the scale, the 18-year-old girl is severely obese. But she doesn’t think so.

“I know I’m big, but I’m not obese,” she says. “I don’t take up three seats. My weight is high, but no higher than lots of people’s. It’s no problem.”

If you’re her doctor or school nurse or parent, what do you do? Do you bombard her with Body Mass Index charts and warnings of the health risks she faces? Knowledge is power, right? Certainly, that’s the principle behind the “BMI report cards” — colloquially known as “fat letters” — that schools send home in some states.

But research just presented at ObesityWeek, a major conference on obesity, suggests that it may not be wise to persuade that young woman that she has a problem.

One study found that overweight teens who “misperceive” their weight as normal end up gaining less weight over the next decade or so than teens who are overweight and know it. Another study found that those “misperceivers” blind to their extra pounds were also less likely to become depressed in later years.

The findings are at odds with the basic assumption behind BMI report cards, that it is helpful to inform kids and their families of their weight status, says researcher Kendrin Sonneville, an assistant professor at the University of Michigan School of Public Health who is also affiliated with Harvard and the Division of Adolescent/Young Adult Medicine at Boston Children’s Hospital.

Kendrin and IdiaXXX

Dr. Kendrin Sonneville and Dr. Idia Thurston at the Obesity Week conference, where they presented studies that found that weight “report cards” may backfire. (Carey Goldberg/WBUR)

“I think we can say the jury is still out,” she says. “Weight misperception is not something we should assume is harmful, and in the spirit of doing no harm, I think we need to proceed with caution on any type of programming that involves correcting weight misperception.”

The study she led, which followed more than 2700 young people beginning in high school, found that after about a decade, the overweight teens who had perceived their weight accurately gained more than one BMI unit — very roughly about 10 pounds — more than those overweight teens who had falsely believed their weight to be normal.

Why might this be? That’s one of the next avenues of research that need to be explored, but clinical psychologist Idia Thurston, an assistant professor at the University of Memphis, says the key could be the emotional baggage that comes with being told you’re overweight or obese.

More accurate weight perception may translate into more feelings of stigma and lower satisfaction with your own body, she says, “and that could affect your ability to cope — hence, depressive symptoms or hence, engaging in harmful eating behaviors.”

“So when we think about weight report cards and telling kids, ‘This is what your weight status is,’ you really need to think about how that information is being disseminated, and what kinds of protections are put into place, rather than just sending report cards home to kids and not knowing how kids will act on that information.”

Dr. Thurston’s study, also presented at ObesityWeek, found that overweight high-school-aged boys who accurately perceived their own weight as high were significantly more likely to develop depressive symptoms over the next decade or so. (The findings in girls were not statistically significant.) Once again, a false sense of being a normal weight appeared to be protective for overweight young people.

The idea of having schools screen kids for obesity began in 2003 in Arkansas during then-Gov. Mike Huckabee’s anti-obesity efforts, Dr. Sonneville says, and spread around the country without ever having a solid research base on what its effects might actually be.

About one-fourth of states track schoolchildren’s height and weight, and last year U.S. News reported that nine sent weight “report cards” home, including Massachusetts. But last October, facing pushback from nurses, parents and others, the state’s Public Health Council voted to stop sending the letters home, though the schools still gather the information. U.S. News reported that decision under the headline “Massachusetts Schools To Stop Sending ‘Fat Letters:'” Continue reading

Sexting The ‘New Normal’ Among Teens?

(Wikimedia commons)

(Wikimedia commons)

By Alvin Tran
Guest Contributor

Sexting may be a new “normal” part of adolescent sexual development, reports a new study published Monday in the journal Pediatrics.

“The study results indicate that sexting may precede sexual intercourse in some cases and further cements the idea that sexting behavior is a credible sign of teenage sexual activity,” the study’s press release reports.

But what the study does not find is any link between sexting and high-risk sexual behavior. That lack of a link, the authors write, may suggest that “sexting is a new ‘normal’ part of adolescent sexual development and not strictly limited to at-risk adolescents.”

The researchers, based at the University of Texas Medical Branch at Galveston, analyzed data of an ongoing six-year study. It followed high school students in southeast Texas, who periodically completed anonymous surveys that measured various behaviors, including their history of sexting and sexual activity. After examining whether teen sexting predicted sexual behavior after a one-year follow-up, they found that the odds of being sexually active among those who sexted was 1.32 times larger than those who didn’t sext the previous year.

“In this temporal examination of the relationship between teen sexting and sexual behaviors, we found that sending naked pictures of oneself was associated with being sexually active one year later,” the authors wrote. But “counter to previous cross-sectional research, sexting was not temporally associated with risky sexual behaviors; and active sexting mediated the relationship between passive sexting and sexual intercourse,” they added.