In each group of CV risk factors, the mean value at baseline (V1) and the absolute change (Δ = V2 − V1) of each parameter was calculated (± SEM). All the examined values (with the exception of plasma triglycerides, which were used as a categorical variable) had a normal distribution. Comparison between groups was performed with multivariate variance analysis by the general linear model procedure including age, gender, tobacco consumption, and, in the case of Δ values, baseline value. Adjustment, or not, for total or LDL cholesterol never modified the results. For PWV variations, adjustments involved age, gender, baseline value, tobacco consumption, and BP, which was introduced successively as MAP, SBP, DBP, and PP. Finally, in the overall population, the changes in PWV from V1 to V2 were studied as function of the change in BP (successively, MAP, SBP, DBP, PP) with a stepwise linear regression identifying the factors significantly associated with PWV variations. Statistical analyses were carried out with the SAS (version 8.02) software (SAS Institute, Cary, North Carolina). Only standard procedures were used. A p value ≤0.05 was considered as significant.