3 years ago

Prevention of cardiovascular disease through reduction of glycaemic exposure in type 2 diabetes: A perspective on glucose-lowering interventions

Michel Marre, Ronan Roussel, Louis Potier, Philippe Gabriel Steg, Kamel Mohammedi
Type 2 diabetes is a leading cause of cardiovascular disease (CVD). Observational studies have consistently shown an association between glycaemic level and risk of major adverse cardiovascular events (MACE); however, intervention studies have provided limited evidence supporting a reduction in the cardiovascular burden of diabetes through intensive glucose control. In the present review, we aimed to examine the concept of cumulative glycaemic exposure with regard to protection against CVD in diabetes. We address how we can move from a binary approach in trials, to a more quantitative approach based on differences in cumulative glycaemic exposure. We plotted the association between differing glycaemic exposures between study arms and the hazard ratio for MACE in randomized controls trials comparing intensive with conventional glycaemic control in type 2 diabetes. We found a strikingly strong correlation between differential exposure and cardiovascular risk reduction. Similar results were obtained for trials comparing antidiabetes drugs with placebo. The results suggest that a minimum study duration and a minimum gain in glycated haemoglobin (HbA1c) reduction are necessary to drive a relevant risk reduction in CVD risk, and we provide a quantitative perspective in that respect. The present analysis underlines that the duration of the intensification of glycemic control, and the amplitude of the resulting reduction in HbA1c, are important notions for clinical decision-making.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1111/dom.13033

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