Figure 1.

Comparison of serum values for the cross-linked N-telopeptide of type I collagen (NTX) with those for other bone markers before and at various times after parathyroidectomy (PTX) for secondary hyperparathyroidism. (a) NTX and intact parathyroid hormone (iPTH); (b) NTX and tartrate-resistant acid phosphatase 5b (TRAP); (c) NTX and bone alkaline phosphatase (BAP). D0: before PTX; D2, D4, W1, W2, and W4: 1 day, 3 days, 1 week, 2 weeks, and 4 weeks after PTX, respectively. Findings are presented as means ± SEM.