PTH and hypoparathyroidism: On postoperative month 1 (POM1),14 patients (10.37%) still had hypoparathyroidism, with an average PTH level of 33.96 ± 16.03 pg/mL, an average serum calcium level of 2.18 ± 0.15 mmol/L, and an average serum phosphorus level of 1.18 ± 0.18 mmol/L.