Coffee or Coke? for diabetic patients

Doctor Jean Michel Lecerf, nutrition specialist at the Pasteur Institute in Lille and ambassador for Agir pour le Cœur des Femmes, has read this recent study on the protective effects of coffee on cardiovascular disease.

We know that coffee consumption is associated with a reduced cardiovascular risk. But what about diabetics? That's the subject of this literature review and meta-analysis of the dose-response effect of prospective studies. Ten cohorts comprising 82,270 cases were identified.
Compared with non-coffee drinkers, the "Hazard Ratio" (HR) for consumption of 4 cups of coffee a day was 0.79 (Confidence Interval (CI) 0.72 - 0.87) (i.e. -21%) for all-cause mortality, 0.60 (CI 0.46 - 0.79) for cardiovascular mortality, 0.68 (CI 0.51 - 0.91) for coronary mortality, 0.72 (CI 0.54 - 0.98) for coronary heart disease, and 0.77 (CI 0.61 - 0.98) for cardiovascular disease.
The Hazard Ratio corresponds to the risk of an event occurring when exposed to the situation. When the HR is less than 1, the effect is beneficial. The confidence interval (CI) is the margin of error of the measurement. The smaller it is, the lower the risk of error, which is the case with the results of this metanalysis.
Coffee consumption therefore has a rather protective effect on the risk of cardiovascular events in diabetics. However, there was no association between coffee consumption and cancer mortality or stroke. With regard to the dose effect, this meta-analysis notes a monotonic inverse relationship (effects increase with dose) between coffee consumption and all-cause and cardiovascular mortality, and a linear inverse association between coffee consumption and coronary and cardiovascular events.
The authors suggest further studies on coffee type, use of cream and sugar (!) and cardiovascular history. Coffee is definitely preferable to Coke!

Reference
SHAHINFAR H., JAYEDI A., KHAN T.A. et al.
Coffee consumption and cardiovascular diseases and mortality in patients with type 2 diabetes: A systematic review and dose-response meta-analysis of cohort studies.
Nutr Metab Card Dis (2021) 31, 2526-2538

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