N -telopeptide, cross-linked (NTx), urine
Adults: 20–100 units
7–17 years old: 20–700 units
(NTx Units = nmol Bone Collagen Equivalents/mmol creatinine or nM BCE/mM creatinine)
(age-specific and laboratory-specific)
24-hour urine. Collect without preservative.
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