Self-Reported Sleep and Circadian Measures Are Not Associated with Glycemia in Adults with Prediabetes or Early Untreated Type 2 Diabetes (T2D)

Abnormal sleep and circadian misalignment (e.g., social jetlag, late chronotype, or shift work) have been associated with abnormal glucose metabolism. These associations have not been well established in adults who meet the ADA criteria for prediabetes. We hypothesized that self-reported short sleep, poor sleep quality or circadian misalignment are associated with worse glycemia, BP and BMI in adults with prediabetes or early untreated T2D. We screened 1,355 overweight/obese men and women age 20-65 y for the Restoring Insulin Secretion (RISE) Study. Completed data from a 2-h OGTT, HbA1c and sleep questionnaires were available for 704 adults with prediabetes and 258 with early untreated T2D. We used a modified Pittsburgh Sleep Quality Index to assess usual bedtime, wake time, and sleep duration on workdays and days off, and the Berlin questionnaire to assess the risk of obstructive sleep apnea (OSA). Regression models explored the independent associations of sleep variables with glycemic variables, BMI and BP. The cohort was 55% men, 45% women; 42% white, 36% black, 16% Hispanic; age 52.2±9.5 years and BMI 34.7±5.5 kg/m2 (mean±SD). Sleep duration was 6.6±1.3 h, poor sleep quality was reported by 54%, high risk for OSA in 64% and 20% did shift work. After adjusting for age, sex, and race/ethnicity, shift work was associated with 1.32 kg/m2 higher BMI (p=0.0043). After adjusting for age, sex, race/ethnicity and BMI, no sleep or circadian variables (sleep duration, sleep quality, OSA risk, shift work, social jetlag and chronotype) were associated with HbA1c, fasting or 2-h glucose, or BP. In this cohort with prediabetes or early untreated T2D, subjective measures of sleep duration, quality and circadian misalignment were not associated with measures of glycemia or BP. Shift workers were more obese. Further research using objective measures of sleep is needed to better delineate the relationship between sleep and glycemia. Disclosure B. Mokhlesi: None. K.A. Temple: None. A.N. Hogan: None. S. Edelstein: None. K. Utzschneider: Consultant; Self; Novo Nordisk Inc.. K.J. Nadeau: None. T. Hannon: Consultant; Self; Eli Lilly and Company. S. Sam: None. E. Barengolts: None. S. Manchanda: None. D.A. Ehrmann: None. E. Van Cauter: Research Support; Self; AstraZeneca. R. Consortium: None.