Habitual Sleep Deprivation is Associated with 
Type 2 Diabetes: A Case-Control Study

Area of Science:

• Metabolic health
• Endocrinology
• Sleep medicine

Background:

• Normal metabolism is thought to require a minimum of eight hours of sleep per night.
• Habitual sleep deprivation is a growing concern with potential health implications.
• Type 2 diabetes mellitus (T2DM) is a prevalent metabolic disorder worldwide.

Purpose of the Study:

• To investigate the association between habitual sleep deprivation and the presence of type 2 diabetes mellitus (T2DM).
• To determine if reduced nocturnal sleep duration is a risk factor for T2DM.

Main Methods:

• A case-control study design was employed.
• Patients diagnosed with T2DM were compared to age- and sex-matched healthy controls.
• Habitual sleep patterns were assessed using standard sleep questionnaires (Berlin, Epworth Sleepiness Scale) and a weekly sleep diary.

Main Results:

• The study included 172 patients with T2DM and 188 healthy controls.
• A statistically significant difference in nocturnal sleep duration was observed between the T2DM group and the control group (p = 0.033).
• Nocturnal sleep duration of less than six hours showed a significant association with T2DM (χ² = 14.0; p = 0.0001).
• No significant differences were found in daytime sleepiness or daytime napping frequency between the groups (p = 0.452; p = 0.581).

Conclusions:

• A nocturnal sleep duration of less than six hours is significantly associated with type 2 diabetes mellitus.
• These findings suggest that insufficient sleep may be a contributing factor to the development of T2DM.