Type 1 Diabetes Mellitus and Cognitive Impairments: A Systematic Review

Area of Science:

• Endocrinology
• Neurology
• Public Health

Background:

• Type 1 diabetes mellitus (T1DM) is an autoimmune condition characterized by insulin deficiency, typically diagnosed in youth.
• While life expectancy for T1DM patients has improved, it remains lower than the general population.
• The association between T1DM and cognitive decline, particularly dementia, requires further investigation.

Purpose of the Study:

• To systematically review and meta-analyze the existing literature on the relationship between T1DM and cognitive impairments.
• To explore the impact of T1DM characteristics, glycemic control, and complications on cognitive function.
• To identify gaps in current research regarding T1DM and dementia.

Main Methods:

• Systematic literature search of Medline, EMBASE, and Google Scholar databases.
• Inclusion of studies on human subjects with T1DM, excluding type 2 or unclassified diabetes.
• Meta-analysis of T1DM's effect on cognitive changes in youths and adults, followed by a focused review.

Main Results:

• Age at onset, disease duration, and glycemic dysregulation are associated with cognitive changes in T1DM.
• Diabetic complications like ketoacidosis, angiopathy, and neuropathy may contribute to cognitive impairments.
• Factors such as BMI and blood pressure also show relations with cognitive alterations in T1DM patients.

Conclusions:

• T1DM is associated with cognitive impairments, with factors like disease duration and complications playing a role.
• Further research is necessary to understand the pathogenesis of T1DM-related cognitive decline and dementia.
• Elucidating these mechanisms is crucial for developing targeted interventions and improving long-term outcomes for T1DM patients.