Table 2.

Patient pre-operative laboratory data.

	SHPT (N = 52)	THPT (N = 34)
iCa	1.38 mmol/L (1.19-1.83)	1.59 mmol/L (1.42-1.75)
iPTH	1682.1 pg/mL (516-2500)	440.9 pg/mL (109-1758)
P	6.5 mg/dL (4.1-11.8)	2.8 mg/dL (1.9-6.3)
AP	603.2 U/L (150-1639)	289.9 U/L (66-1304)
Cr	-	1.7 mg/dL (1-9.2)

SHPT: Secondary hyperparathyroidism; THPT: Tertiary hyperparathyroidism, iCa: Serum ionized calcium, P: Phosphorus; AP: Alkaline phosphatase; iPTH: Intact parathyroid hormone. Reference values: iCa: 1.11-1.40 mmol/L; P:2.3-4.6 mg/dL; AP: 35-129 U/L; iPTH: 10-65 pg/mL. Data on average and range (parenthesis).