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

Taiwan: A recent 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 ≥ 65 years, diabetes duration ≥ 5 years, insulin use, diabetes diagnosis ≤ 45 years, SBP/DBP > 130/85 mmHg, HbA1c ≥ 7%, and TG ≥ 150 mg/dL than in those with 7 h of sleep and their counterparts. 

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, Tsai-Chung Li, Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung, Taiwan, and colleagues aimed to investigate 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.