June 14, 2012 (Philadelphia) -- Type 1 and type 2 diabetes are rising among U.S. kids and teens, according to the first national snapshot of diabetes rates among American youths.
The new report, presented this weekend in Philadelphia at the American Diabetes Association's annual meeting, shows a 23% rise in rates of type 1 diabetes and a 21% rise in type 2 diabetes rates from 2001 to 2009.
Both trends are sounding alarm bells for researchers.
The rise in type 1 diabetes is "alarming," says researcher Elizabeth Mayer-Davis, PhD, MSPH, RD, of the University of North Carolina at Chapel Hill. Even so, it was not a complete surprise, as a similar increase has been reported among European youth, Mayer-Davis says.
"This is frightening," says Robert E. Ratner, MD, chief scientific and medical officer of the American Diabetes Association.
"These are harbingers of adult health problems," he tells WebMD. If the trend is not reversed, there could be an epidemic of heart disease, stroke, and kidney failure when this generation is age 25-35, Ratner says.
It's not clear why type 1 diabetes is becoming more common. One theory holds that today's infants are exposed to fewer viruses and bacteria that help the immune system mature, says researcher Dana Dabelea, MD, PhD, of the University of Colorado in Denver.
Some studies also suggest a possible link between very early exposure to cow's milk and certain foods to a higher risk of type 1 diabetes. "Studies are exploring whether later introduction of some foods to the infant's diet may be protective," Dabelea tells WebMD. "But we really don't know the cause."
The rise in type 2 diabetes, though dramatic, was less surprising. That's because obesity is a major risk factor for type 2 diabetes, and about 1 in 3 U.S. kids is overweight or obese. More than 90% of kids with type 2 diabetes are overweight or obese, the new study shows.