More teens in the U.S. have diabetes or
prediabetes than previously thought.
Many also don't know they have this
disease, a new study discovered. Nearly 1 percent of more than 2,6--
teens studied had diabetes, with almost one in three cases
undiagnosed. Of the 2,600, almost 20 percent had prediabetes – in
the range of 100 mg/dl to 125 mg/dl.
"These findings are important
because diabetes in youth is associated with early onset of risk
factors and complications," said lead researcher Andy Menke of
Social & Scientific Systems in Silver Spring, Md. One prior
study estimated the prevalence of diabetes in teens at about 0.34
percent, but the current study shows it's double that -- 0.8 percent.
The researchers couldn't distinguish
between teens that had type 1 or type 2 diabetes. However, previous
research among children and teens with diabetes found that 87 percent
had type 1 diabetes, previously called juvenile diabetes.
While type 1 diabetes, an autoimmune
disease, isn't preventable, type 2 is usually related to lifestyle
factors. Type 2 is generally seen in adults, but experts say it's
risen among younger people as obesity rates have soared.
Dr. Joel Zonszein, director of the
Clinical Diabetes Center at Montefiore Medical Center in New York
City says, "It is alarming to see such a high incidence of
[childhood] diabetes when it should be close to zero.” “The very
high prevalence of prediabetes, diabetes and especially undiagnosed
diabetes in adolescents is worrisome," he added. “The
majority of those with prediabetes will develop diabetes if nothing
is done to change their lifestyle,” Zonszein concluded.
African Americans and Hispanics were
more likely than whites to have prediabetes or not know they had
diabetes, the study found. There are effective treatments, but those
treatments are not useful to people who have not been diagnosed.
Untreated, diabetes can lead to heart disease, circulatory problems,
vision loss, and amputation of feet and legs.
Classic symptoms include increased
urination, increased thirst, weight loss (due to dehydration), and
perhaps increased hunger and blurry vision. Previous studies have
found that both type 1 and type 2 diabetes are increasing among
adolescents.
According to the U.S. National
Institute of Diabetes and Digestive and Kidney Diseases, being
overweight or obese is the main cause of type 2 diabetes. People at
high risk can prevent or delay its onset by losing 5 percent to 7
percent of their weight, the agency says. Because type 2 is
considered lifestyle-related, better education on reducing risk
factors for type 2 and improved screening for adolescents at high
risk is needed. The agency recommends at least 30 minutes of
moderate-intensity physical activity five days a week, and reducing
daily calorie consumption.
Of 62 teens with diabetes, 29 percent
didn't know it. Prevalence of prediabetes was 18 percent, and more
common in boys. Among the diabetic teens, nearly 5 percent of whites
had not been diagnosed versus 50 percent of the African Americans and
40 percent of Hispanics.