PTH and familial primary hypomagnesemia: In the univariate linear regression models, age, eGFR, CKD, sMg, hypomagnesemia, fractional excretion of Mg2+, PTH, hyperparathyroidism, glucose metabolism disorders, hypertension, HNF1B mutation, and FEUA were all significantly associated with sUA (Supplementary Material–Table S1).