From 1980 to 2013, childhood obesity rose by 47.1 percent across the globe, says a study published online last week in the journal The Lancet.
The authors relied on body mass index as the benchmark for being overweight and obese.
In 1980, 16.9 percent of boys and 16.2 percent of girls in developed countries were either considered overweight or obese. Thirty-three years later, those percentages jumped to 23.8 percent of boys and 22.6 percent of girls.
