1328-P: Impact of Early Childhood-Onset Type 1 Diabetes on Brain Structural Trajectories (CLARiFY Study)

Abstract

Although childhood-onset of Type 1 diabetes (T1D) is associated with alterations in structural brain development, the influence of T1D over time remains poorly understood. We aimed to compare the trajectories of brain structure change in a sample of children with T1D to age-matched children without T1D. We recruited children presenting to a tertiary hospital in Australia between 1990 - 1992 into this prospective cohort study (Cognition and Longitudinal Assessment of Risk Factors over 30 Years (CLARiFY) Study). Brain magnetic resonance imaging (MRI) was performed at two time points, approximately 20 years apart. We examined for between-group differences in normalized brain volumes and cortical thickness (CT) across time using linear mixed models. A total of 127 images were available at timepoint 1 (77 with T1D, mean age=20 years, 43% female) and 68 at timepoint 2 (36 with T1D, mean age=37 years, 49% female). At timepoint 1, those with T1D had lower subcortical gray matter volume than those without T1D (p=0.01) but the remaining measures were similar. Across time, those with T1D had greater decline in cortical thickness (β=-2280, p=0.03) than those without T1D, with trajectories in other measures being similar (Table). In conclusion, these preliminary findings suggest that childhood-onset T1D is associated with lower subcortical gray matter and altered development of cortical gray matter over time. Disclosure O.Gbadeyan: None. C.Moran: None. A.Brown: None. S.A.Sakowski: None. V.Srikanth: None. F.Cameron: None. E.A.Northam: None. E.L.Feldman: None. R.Beare: None. Funding National Institutes of Health (R01DK129320)