Sleep Quality, Glycemic Control, and Daytime Dysfunction in Type 2 Diabetes

Area of Science:

• Endocrinology
• Sleep Medicine
• Metabolic Disorders

Background:

• Type 2 diabetes mellitus (T2DM) is associated with diminished sleep quality, impacting glycemic control.
• Both poor sleep and inadequate glycemic management elevate the risk of diabetes-related complications.
• The intricate relationship between sleep quality, daytime dysfunction, and glycemic control in T2DM patients remains unclear.

Purpose of the Study:

• To investigate the association between sleep quality, including daytime dysfunction, and glycemic control in adults with T2DM.
• To analyze the links between sleep metrics (e.g., sleep-onset latency) and glycemic indicators (HbA1c, FBG).

Main Methods:

• A hospital-based cross-sectional study involving 200 T2DM patients.
• Sleep quality and daytime dysfunction assessed using the Pittsburgh Sleep Quality Index (PSQI).
• Glycemic control evaluated via hemoglobin A1c (HbA1c) and fasting blood glucose (FBG) levels.
• Statistical and Bayesian analyses employed to examine associations.

Main Results:

• 32% of T2DM patients reported poor sleep quality (PSQI > 5); 43.5% experienced daytime dysfunction.
• Higher HbA1c and FBG levels correlated with longer sleep-onset latency and increased daytime dysfunction.
• Multivariable analysis revealed HbA1c and sleep-onset latency independently linked to poor sleep quality (R² = 0.602).
• Higher FBG and longer sleep-onset latency were associated with greater daytime dysfunction severity (R² = 0.378).

Conclusions:

• Sleep quality and sleep-onset latency are interconnected with impaired glycemic control and daytime dysfunction in T2DM.
• Findings suggest sleep quality is a relevant factor in diabetes management.
• Further randomized trials focusing on sleep-onset latency are recommended to establish causality and explore therapeutic potential for glycemic outcomes.