Li, WeiRisacher, Shannon L.Huang, EdgarSaykin, Andrew J.2018-02-272018-02-272016-08-09Li, W., Risacher, S. L., Huang, E., & Saykin, A. J. (2016). Type 2 diabetes mellitus is associated with brain atrophy and hypometabolism in the ADNI cohort. Neurology, 87(6), 595–600. https://doi.org/10.1212/WNL.00000000000029500028-3878https://hdl.handle.net/1805/15294Objective: We investigated type 2 diabetes mellitus (T2DM) as a risk factor for brain atrophy and glucose hypometabolism in older adults with or at risk of cognitive impairment. Methods: Participants with the T2DM were identified from the Alzheimer's Disease Neuroimaging Initiative (ADNI-1/GO/2 cohorts). Analysis of covariance models were used to compare participants with and without T2DM, controlling for potential confounding factors. Results: Whole brain volume and whole brain [18F]-fluorodeoxyglucose (FDG) uptake were significantly different as a function of T2DM status, independent of baseline clinical diagnosis. On post hoc analysis, a lower whole brain volume was seen in participants with both mild cognitive impairment (MCI) and T2DM (n = 76) compared with participants who had MCI but not T2DM (n = 747; p = 0.009). Similarly, mean FDG uptake in gray matter and white matter was lower in participants with both MCI and T2DM (n = 72) than in participants with MCI without T2DM (n = 719; p = 0.04). Subsequent regional analysis revealed that the decreased FDG uptake in participants with both MCI and T2DM was mainly manifested in 3 brain regions: frontal lobe, sensory motor cortex, and striatum. Conclusions: T2DM may accelerate cognition deterioration in patients with MCI by affecting glucose metabolism and brain volume.en-USPublisher Policydiabetes mellitusbrainhypometabolismArticle