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A study published in the journal Acta Diabetologica reports that people with diabetes and prediabetes who have lower sleep efficiency — a measure of how much time in bed is actually spent sleeping — have poorer cognitive function than those with better sleep efficiency.

“The cognitive effects of poor sleep quality are worse for this population, which we know is already at risk for developing cognitive impairment as a result of having diabetes,” said Dr. Sirimon Reutrakul, associate professor of endocrinology, diabetes and metabolism in the University of Illinois at Chicago College of Medicine and corresponding author on the paper.

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