Sleep Quality and Glycemic Control in Type 2 Diabetes
Summary
Sleep quality and glycemic control are intimately linked in type 2 diabetes, forming a bidirectional relationship in which disturbed sleep exacerbates dysregulated glucose metabolism, and poor glycemic control in turn impairs sleep architecture. Individuals with type 2 diabetes exhibit high rates of insomnia, obstructive sleep apnoea and restless legs syndrome, each of which is associated with elevated levels of glycated haemoglobin and greater insulin resistance. Mechanistic studies point to autonomic dysfunction, low‐grade inflammation and hormonal imbalances—particularly in cortisol and growth hormone secretion—as mediators of this interplay. Observational cohorts have demonstrated that habitual short sleep duration and prolonged sleep latency predict higher fasting glucose and postprandial excursions, while interventional trials of sleep extension, cognitive behavioural therapy and continuous positive airway pressure have yielded improvements in sleep parameters and modest reductions in HbA1c. Recognising and addressing sleep disturbances in routine diabetes care offers a practical avenue to enhance metabolic outcomes, reduce cardiovascular risk and improve quality of life on a global scale.
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Sleep Quality and Glycemic Control in Type 2 Diabetes publication trend
The graph below shows the total number of articles in sleep quality and glycemic control in type 2 diabetes across all publications each year (not limited to Nature Index journals).
Technical terms
Glycemic control: The maintenance of blood glucose within a target range, often assessed by HbA1c levels.
HbA1c: Glycated haemoglobin, reflecting average blood glucose over the preceding two to three months.
REM sleep latency: The interval between sleep onset and the first rapid eye movement (REM) period, indicating aspects of sleep architecture.
Pittsburgh Sleep Quality Index (PSQI): A validated questionnaire that quantifies subjective sleep quality over the previous month.
References
- Sleep disorders in people with type 2 diabetes and associated health outcomes: a review of the literature. Diabetologia (2021).
- Association between Poor Glycemic Control, Impaired Sleep Quality, and Increased Arterial Thickening in Type 2 Diabetic Patients. PLOS ONE (2015).
- Association of usual sleep quality and glycemic control in type 2 diabetes in Japanese: A cross sectional study. Sleep and Food Registry in Kanagawa (SOREKA). PLOS ONE (2018).
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