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    Sleep Apnea May Raise Risk of Diabetes

    Up to 30 percent higher chance of developing blood sugar disease seen in study, but findings aren't conclusive

    WebMD News from HealthDay

    By Steven Reinberg

    HealthDay Reporter

    FRIDAY, June 6, 2014 (HealthDay News) -- A study of more than 8,600 people suffering from sleep apnea suggests a possible increased risk for developing diabetes, Canadian researchers report.

    They noted that sleep apnea results in less oxygen reaching cells in the body, less sleep and an increased heart rate, all of which are associated with a biological link to diabetes.

    "Controlling for known risk factors for diabetes -- including age, sex, weight, smoking, other medical problems and income status -- patients with severe sleep apnea had a 30 percent higher risk of developing diabetes than those without sleep apnea," said lead researcher Dr. Tetyana Kendzerska. She's with the University of Toronto's Institute of Health Policy, Management and Evaluation.

    Obesity, an important risk factor or both diabetes and sleep apnea, was taken into account.

    "We controlled for body-mass index [a measure of weight and height that defines obesity], and severe sleep apnea was found to be independently associated with diabetes," she said.

    Kendzerska cautioned, however, that this was an observational study, and cannot prove that sleep apnea causes diabetes. "We are not able to investigate causality, just an association," she explained.

    The report was published online June 6 in the American Journal of Respiratory and Critical Care Medicine.

    Shelby Freedman Harris, director of the Behavioral Sleep Medicine Program and the Sleep-Wake Disorders Center at Montefiore Medical Center in New York City, said, "I definitely think that this is an important study highlighting the need for more sleep apnea awareness, screening and treatment."

    "Given the large sample size, it further places emphasis on sleep apnea as a predictor of diabetes, and hopefully with earlier intervention, it can greatly impact the health costs for diabetes management as well as improve the outcomes for many patients," she said.

    For the study, Kendzerska and her colleagues collected data on 8,678 adults who were diagnosed with sleep apnea between 1994 and 2010 and didn't have diabetes.

    The participants were followed through May 2011. During that time 1,017 (11.7 percent) of the patients developed diabetes.

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