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Aortic pulse pressure in the beginning (a) and at the end of the follow-up (b); and respective results of forward wave amplitude (c and d), and backward wave amplitude (e and f) adjusted for age, cystatin-C, presence of diabetes, BMI; n = 40 in each group; GEE, generalized estimating equations, mean and standard error of the mean; ∗P < 0.05, ∗∗∗P < 0.001.
