If we exclude from the control group, those subjects with the presence of at least one cardiovascular risk factor (such as arterial hypertension or dyslipidemia), the results remained unchanged: patients with T1DM still had higher aPWV values (aPWV: 5.7 (5.4–6.5) vs. 6.8 (6.0–7.9); p = 0.004) and FGF23 concentrations (76.9 (51.6–112.2) vs. 70.1 (38.4–151.9); p = 0.441) and vitamin D concentrations (72.1 (59.7–80.7) vs. 70.3 (50.4–86.2); p = 0.602) remained similar between both groups. The gene discussed is FGF23; the disease is type 1 diabetes mellitus.