Quinn LM, Hadjiconstantinou M, Brady EM, et al. - Evening chronotype may be associated with increased levels of diabetes-related distress and depression in patients with type 2 diabetes. These findings call for more research to determine causality and evidence-based therapies to counteract the effects of evening chronotype in persons with type 2 diabetes.

• As a secondary endpoint of the ‘Chronotype of Patients with Type 2 Diabetes and Effect on Glycaemic Control' (CODEC) observational study, participants completed questionnaires to determine chronotype (Morningness-Eveningness Questionnaire, MEQ) and concurrent measures of wellbeing (Diabetes-related Distress Scale, Patient Health Questionnaire-9 to measure depression, and Self-Compassion Scale).

• The psychosocial questionnaire sub-study was completed by 476 of the 808 participants who took part in the CODEC study by convenience sampling.

• The sample consisted of 321 males (67%) and 408 White European (86%).

• The MEQ revealed that 24% (n = 114) were morning chronotype, 24% (n = 113) were evening, and 52% (n = 249) were intermediate chronotype.

• Diabetes-related distress was considerably greater in evening chronotypes than in the morning and intermediate chronotypes.

• Depression was also significantly higher in evening chronotypes than in morning and intermediate chronotypes.