5-7 hours of sleep/ day lowers mortality risk in patients with type 2 diabetes

Sleep duration is associated with mortality. However, previous studies that explored whether sleep duration predicts subsequent long-term mortality in patients with diabetes are limited. To fill this knowledge gap, researchers from the Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taiwan, investigated whether metabolic factors affect the associations between baseline sleep duration and subsequent risks of all-cause, expanded, and non-expanded cardiovascular disease (CVD) mortalities among type 2 diabetes patients.

The study in the journal Cardiovascular Diabetology has revealed a J-shaped association between increased all-cause and expanded CVD mortalities and sleep durations in type 2 diabetes (T2D) patients. Further, sleep duration of 5-7 hours per day had the lowest risk of mortality.

The risk of all-cause and expanded CVD mortalities were seen to be higher in patients who sleep for less or more than 7 h per night and with age greater than 65 years with a diabetes duration of more than 5 years, insulin use, than in those with 7 h of sleep. Therefore it was concluded that a J-shaped association showed an increase in all-cause CVD mortalities for sleep durations in people with T2D.