C-Terminal Telopeptide of Collagen Type I alpha Chain (CTx)

How to Cite This Chapter: Don-Wauchope A, Chetty VT, Ivica J, Kavsak P, Khan WI, Lafreniere M, Nouri K, Solnica B. C-terminal Telopeptide of Collagen Type I Alpha Chain (CTx or Beta-CTx). McMaster Textbook of Internal Medicine. Kraków: Medycyna Praktyczna. https://empendium.com/mcmtextbook/chapter/B31.1269.3.7.61. Accessed May 26, 2024.
Last Updated: May 9, 2022
Last Reviewed: May 9, 2022
Chapter Information

For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.

Analyte [material]

C-terminal telopeptide of collagen type I alpha chain (CTx or beta-CTx) [S/U]

Reference range, target level, or decision threshold

<450 microg/mmol of creatinine [U]!!!

Postmenopausal women: <800 microg/mmol of creatinine [U]!!!

Premenopausal women: <0.573 ng/mL [S]!!!

Postmenopausal women: 0.104-1.008 ng/mL [S]!!!

Interpretation of results

↑ Bone diseases (bone resorption): Osteoporosis, osteomalacia, primary hyperparathyroidism, CKD, vitamin D deficiency, metastases

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