US obesity 'higher than thought'

We're Number One! U-S-A! U-S-A!

The obesity problem in the US may be much worse than previously thought, according to researchers.

They said using the Body Mass Index or BMI to determine obesity was underestimating the issue.

Their study, published in the journal PLoS One, said up to 39% of people who were not currently classified as obese actually were.

The authors said "we may be much further behind than we thought" in tackling obesity.

Yes.