June 27, 2011 (San Diego) -- The number of adults with diabetes worldwide has more than doubled since 1980 to nearly 350 million, fueled in large part by an aging population and rising rates of obesity.
Diabetes rates have risen or at best remained flat in virtually every part of the world during the past three decades, according to international team of researchers led by Majid Ezzati, PhD, of Imperial College London, and Goodarz Danaei, MD, of Harvard School of Public Health in Boston.
The new figures are considerably higher than those of a recent study that estimated 285 million adults worldwide had diabetes.
Among high-income countries, diabetes rates were highest in the U.S., Greenland, Malta, New Zealand, and Spain. The Netherlands, Austria, and France boasted the lowest rates.
Despite the obesity epidemic in the U.K, the diabetes rate there was lower than that of most other high-income countries. Of 27 Western high-income countries, Britain had the fifth lowest diabetes rates among men and the 8th lowest rate for women.
The study was published online by The Lancet journal on June 25 to coincide with the annual meeting of the American Diabetes Association here.
People with diabetes have poor blood sugar control, which can lead to a host of serious complications, including heart disease, stroke, blindness, and kidney damage.
High blood sugar and diabetes are responsible for about 3 million deaths globally each year, a number that will continue to rise as the number of people affected increases, according to the report.
For the study, the largest of its kind, the researchers analyzed fasting blood sugar (glucose) measurements from 2.7 million people aged 25 and older in 199 countries and territories. If a fasting blood glucose level was 126 mg/dL (7.0 mmol/L) or higher, a diagnosis of diabetes for study purposes was made.
From 1980 to 2008, the number of adults with diabetes rose from 153 million to 347 million, the report says. Seventy percent of the rise was because of population growth and aging, and the obesity epidemic accounted for much of the other 30%, Martin Tobias, MBBCh, of the Ministry of Health in Wellington, New Zealand, notes in a commentary accompanying the study.
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