BBC — The obesity problem in the US may be much worse than previously thought, according to researchers.
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.
BMI is a simple calculation which combines a person’s height and weight to give a score which can be used to diagnose obesity. Somebody with a BMI of 30 or more is classed as obese.