NEW YORK — About 4 in 10 American adults are obese, and nearly 1 in 10 is severely so, government researchers said Thursday.

The Centers for Disease Control and Prevention findings come from a 2017-18 health survey that measures height and weight. More than 5,000 U.S. adults took part.

The survey found that the obesity rate was 42 percent — higher than the 40 percent found in a similar 2015-16 study. The severe obesity rate was more than 9 percent in the new survey, up from the 8 percent figure in the previous one.

Those increases aren’t considered statistically significant: The survey numbers are small enough that there’s a mathematical chance the rates didn’t truly rise.