PTH and hypoparathyroidism: The mean serum calcium and PTH levels were lower in patients with hypoparathyroidism (8.7 ± 1.6 mg/dL, and 13.93 ± 4.6 pg/mL) than the control (10.1 ± 0.9 mg/dL, and 55.6 ± 15.7 pg/mL), (P = 0.001 and P < 0.001, respectively).