A stronger association of diabetes mellitus with impaired hyperaemia using a novel ECG-gated device compared with peripheral arterial tonometry.

After adjusting for age and smoking status, flicker-stimulated retinal arteriolar calibre change from baseline was associated with diabetes mellitus ( β = − 0.80, p < 0.0001) and flicker-stimulated venular calibre change from baseline ( β = 0.34, p = 0.0008), but this association did not reach statistical significance with reactive hyperaemia index ( β = 0.22, p = 0.02).

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