Association of sleep quality and glycemic control in type 2 diabetes mellitus

Background: Sleep is a modifiable risk factor for many chronic diseases, including type 2 diabetes mellitus. Poor quality of sleep leads to poor management of diabetes, adversely affecting sleep. The vicious cycle can be curtailed by good quality of sleep. Our study observed the association of glycemic control (glycosylated hemoglobin [HbA1C]) with sleep quality. Materials and Methods: A cross-sectional, observational study was conducted in the Diabetic Clinic of MGM Hospital, Kamothe, Navi Mumbai, India. Type 2 diabetes patients in the age group of 30–60 years were assessed for sleep quality using the Pittsburgh Sleep Quality Index questionnaire, and their HbA1C was measured by high-performance liquid chromatography. Results: A total of 101 type 2 diabetes patients aged 30–60 were assessed. A total of 25% were good sleepers, and 75% were poor sleepers. The mean ± standard deviation of HbA1C in good sleepers was 7.14 ± 1.30, and in poor sleepers was 8.9 ± 2.44. The correlation between sleep quality and glycemic control gave an r value of 0.36, and the P value was 0.002, which shows a highly significant correlation between poor sleep and glycemic control. Conclusion: The study shows poor sleep quality leads to poor glycemic control in type 2 diabetic patients with higher HbA1c levels. Creating awareness among diabetic patients about the good quality and duration of sleep for better management of diabetes is essential.