Age at type 1 diabetes onset does not influence attained brain volume.

Area of Science:

• Neuroscience
• Endocrinology
• Radiology

Background:

• Type 1 diabetes (T1D) onset in childhood may impact brain development.
• Previous research suggests a potential link between early T1D and reduced maximal brain volume.
• This study investigates the long-term effects of T1D onset age on brain structure.

Purpose of the Study:

• To test the hypothesis that earlier Type 1 diabetes onset is associated with lower maximal brain volume.
• To examine the relationship between age at T1D diagnosis and brain volumes in adulthood.

Main Methods:

• Brain MRI scans of 180 middle-aged adults with T1D were analyzed.
• Fractional polynomial regression models assessed the association between age at T1D onset and intracranial, gray matter, and white matter volumes.
• A subset of 113 participants had detailed brain volume measurements.

Main Results:

• No significant association was found between age at T1D onset and intracranial volume (p=0.85).
• No significant association was observed for cerebral white matter (p=0.10) or gray matter volumes (p=0.12).
• Correlations between age at onset and brain volumes were weak, even when stratified by sex.

Conclusions:

• Age at Type 1 diabetes onset is not associated with attained intracranial, gray matter, or white matter volumes.
• Findings suggest Type 1 diabetes may not have a clinically significant impact on overall brain growth.
• This research provides evidence against a substantial long-term effect of T1D onset timing on brain structure.