Cognitive function in Japanese elderly with type 2 diabetes mellitus.

Area of Science:

• Gerontology
• Endocrinology
• Neuroscience

Background:

• Type 2 diabetes mellitus (DM) is a growing concern in the elderly population.
• Cognitive impairment is a potential complication of DM, affecting quality of life.
• Limited research exists on cognitive function in Japanese elderly with DM.

Purpose of the Study:

• To investigate cognitive function in Japanese elderly individuals with type 2 DM.
• To examine the relationship between glycemic control (HbA1c) and cognitive performance.
• To assess the impact of insulin treatment on cognitive function in this demographic.

Main Methods:

• Cross-sectional study comparing 69 diabetic and 27 non-diabetic Japanese elderly (60-85 years).
• Cognitive assessments included MMSE, Word Lists Recall, Digit Symbol Test (WAIS-R), and Stroop Color Word Test.
• Glycemic control assessed via HbA1c; recent hypoglycemic episodes and insulin use were recorded.

Main Results:

• Diabetic subjects scored significantly lower on MMSE and Digit Symbol Test compared to non-diabetics.
• Digit Symbol Test scores negatively correlated with HbA1c in diabetic subjects.
• Insulin-treated diabetic subjects exhibited significantly lower MMSE and Digit Symbol Test scores than non-insulin-treated diabetics and non-diabetics.

Conclusions:

• Japanese elderly with type 2 DM exhibit impaired cognitive function.
• Insulin treatment in elderly diabetic patients is associated with poorer cognitive outcomes.
• Glycemic control and insulin therapy are critical factors influencing cognitive health in elderly diabetics.