Depressive Symptoms Are Associated with Cognitive Function in the Elderly with Type 2 Diabetes

Area of Science:

• Geriatric Medicine
• Neuroscience
• Endocrinology

Background:

• Type 2 diabetes (T2D) is linked to adverse cognitive outcomes, including dementia.
• Depression is a known risk factor for cognitive decline in the general elderly population.
• The relationship between depression and cognition in T2D patients remains under-explored.

Purpose of the Study:

• To investigate the association between depression and cognitive function.
• Focus on a large cohort of cognitively normal elderly individuals with T2D.

Main Methods:

• Cross-sectional study of 738 participants (aged 65-88) from the Israel Diabetes and Cognitive Decline study.
• Assessed cognitive domains: Episodic Memory, Executive Function, Attention/Working Memory, Language/Semantic Categorization, and Overall Cognition.
• Used multiple linear regressions to analyze the association with depression (Geriatric Depression Scale score > 5), adjusting for age, sex, and education.

Main Results:

• Depression (8.9% of participants) was significantly associated with poorer performance in Executive Function, Language/Semantic Categorization, and Overall Cognition.
• No significant association was found between depression and Episodic Memory or Attention/Working Memory.
• Secondary analyses and adjustments for antidepressant use did not substantially alter these findings.

Conclusions:

• Depression is associated with impaired cognitive function in cognitively normal elderly individuals with T2D.
• These findings suggest a potential role for depression in cognitive decline within the T2D population.
• Antidepressant use may potentially mitigate these cognitive effects.