AHSG and Pseudoxanthoma elasticum: Determinants of calcification propensity T50 were evaluated using multivariate linear regression analysis identifying serum fetuin-A (standardized β = 0.40; p < 0.001), serum phosphorus (standardized β = −0.32; p = 0.007) and serum magnesium levels (standardized β = 0.25; p = 0.034) as independent determinants of T50 in PXE patients (adjusted R2 = 0.30; ANOVA: p < 0.001) (Table 2).