Sleep in Type 2 diabetes.

OBJECTIVES To examine the relationship between glycemic control in Type 2 diabetics and sleep duration and quality of sleep. METHODS There were 220 adult non-insulin dependent diabetics (Type 2) with 69 males and 151 females. The mean age was 59.4 +/- 9.2 yrs (Mean +/- SD), mean BMI 35.6 +/- 9.9 kg/m2, and mean HbA1c 8.2 +/- 2.1%. Detailed questions about history and management of diabetes, height, weight and the Pittsburgh Sleep Quality Index (PSQI) were obtained to measure subjective sleep quality. HbA1c data were obtained to measure glycemic control in the past three months. RESULTS The mean amount of self-reported sleep was 6.10 +/- 1.66 hours. The mean difference between preferred and actual weekday sleep was 1.83 +/- 2.01 hours indicating significant perceived sleep debt. The mean Pittsburgh Sleep Quality Index (PSQI) score was 8.3 and 71% of patients had a score of > 5 which is clinically diagnostic for poor sleep. CONCLUSION A significant proportion of Type 2 diabetics have reduced sleep and there is a definite association between glycemic control and both quality and quantity of sleep.