The mean sleep duration was 6.2 hours, and 15.6% had poor sleep quality. During the follow-up period of 22 months, there were 664 incident cases of diabetes. This was 31,582 person years and the incidence rate stood at 21 in every 1,000 person years.
Adults with prediabetes who slept for 5 hours and less a night were 68% likely develop diabetes when compared to adults who slept 7 hours of sleep per night. Those who slept 6 hours a night were 44% likely to develop diabetes and those who slept 8 hours and more a night were 23% likely to progress to diabetes.