PTH and urolithiasis: Univariate logistic regression analysis indicated that hypertension (P = 0.012) and PTH level (P = 0.044) were associated with postoperative BMD improvement, while sex (P = 0.792), age (P = 0.901), BMI (P = 0.533), cardiovascular disease (P = 0.602), bone pain (P = 0.701), fracture (P = 0.263), urinary calculus (P = 0.122), calcium level (P = 0.700), serum phosphorus level (P = 0.062), ALP level (P = 0.136), parathyroid nature (P = 0.654), wet weight (P = 0.097), and volume of the removed parathyroid gland (P = 0.462) were not associated with postoperative BMD improvement (Table 2).