Serum Bone Resorption Markers after Parathyroidectomy for Renal Hyperparathyroidism: Correlation Analyses for the Cross-Linked N-telopeptide of Collagen I and Tartrate-Resistant Acid Phosphatase

Table 2

Associations between the cross-linked N-telopeptide of type I collagen and other parameters of bone resorption (measurements obtained at various times were pooled).

	𝑟	𝑃
iPTH	0.450	<0.001
TRAP	0.690	<0.001
BAP	0.448	<0.001
Ca	−0.161	0.042
Pi	0.197	0.012

iPTH, intact parathyroid hormone; TRAP, tartrate-resistant acid phosphatase 5b; BAP, bone alkaline phosphatase; TCa, total calcium; Pi, inorganic phosphate. Spearman’s correlation coefficients were calculated assuming a nonnormal distribution.