Fig. 2From: Endothelial dysfunction is not a predictor of outcome in chronic obstructive pulmonary diseasea Reactive hyperemia index (RHI) and (b) arterial stiffness, as measured by the augmentation index (AI) remained unchanged during stable state and exacerbation, as assessed by the paired t-test (p = 0.625 and p = 0.530 accordingly)Back to article page