Clinical Edge Journal Scan

Metformin may offer more neuroprotection for dementia than sulfonylurea in T2D


Key clinical point: Patients with type 2 diabetes (T2D) who used metformin vs. sulfonylurea were at a significantly lower risk for all-cause dementia, Alzheimer’s disease (AD), and vascular dementia (VD), but not Parkinson’s disease (PD) or mild cognitive impairment (MCI).

Major finding: The risk for all-cause dementia (hazard ratio [HR] 0.80; 95% CI 0.73-0.88), AD (HR 0.81; 95% CI 0.70-0.94), and VD (HR 0.79; 95% CI 0.63-1.00) was significantly lower in metformin vs sulfonylurea users, with no significant difference in the risk for PD and MCI.

Study details: Findings are from a new user active comparator study including 112,591 patients with T2D, of which 96,140 were new metformin users and 16,451 were new sulfonylurea users.

Disclosures: This study was supported by Janssen Pharmaceuticals. AJ Nevado-Holgado declared receiving funding from Janssen Pharmaceuticals and others. QS Li declared being an employee of Janssen Research & Development, Johnson & Johnson, or holding equity in Johnson & Johnson.

Source: Newby D et al. Comparative effect of metformin versus sulfonylureas with dementia and Parkinson's disease risk in US patients over 50 with type 2 diabetes mellitus. BMJ Open Diabetes Res Care. 2022;10(5):e003036 (Sep 15). Doi: 10.1136/bmjdrc-2022-003036

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