PTH and hypertensive disorder: Serum levels of 25(OH)D were negatively correlated with age (p < 0.001), duration of hypertension (p = 0.006), fasting glucose (p < 0.001), HOMA index (p = 0.032), PTH (p < 0.001), carotid IMT (p < 0.001), Young’s elastic modulus (p = 0.025), and β-stiffness (p < 0.001), and positively related with carotid coefficient of distensibility (p < 0.001).