Obstructive Sleep Apnea is a Predictor of Abnormal Glucose Metabolism in Chronically Sleep Deprived Obese Adults

Sleep duration and quality, OSA, and glucose metabolism were assessed in 96 obese individuals reporting to sleep less than 6.5 hrs on a regular basis. OSA severity was associated with higher fasting glucose and insulin. Those with moderate to severe OSA had higher glucose at 120 min while undergoing a glucose tolerance test.

http://www.ncbi.nlm.nih.gov/pubmed/23734252