Response to Comment on Samara et al. Metformin Use Is Associated With Slowed Cognitive Decline and Reduced Incident Dementia in Older Adults With Type 2 Diabetes: The Sydney Memory and Ageing Study. Diabetes Care 2020;43:2691–2701

We thank Violante-Cumpa et al. (1) for their comments on our article that showed metformin use in older people with type 2 diabetes (diabetes) mitigated cognitive decline and incident dementia risk (2). We here respond to each comment. First, Violante-Cumpa et al. comment that the metformin group took other glucose-lowering medications (50%) compared with 40% in those not on metformin. While metformin is the recommended first line for treatment of diabetes, many people with diabetes …