Age-related reference intervals for bone turnover markers from an Australian reference population

N Jenkins, M Black, Eldho Paul, Julie Anne Pasco, Mark Kotowicz, Hans-Gerhard Schneider

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Abstract

This study was performed to establish age-related serum reference intervals for procollagen type I N-propeptide (P1NP) and type I collagen C-telopeptide (CTx) in the Australian population. Methods: Fasting sera from 1143 males (mean age 60. years; range 20-97. years) and 1246 females (mean age 53. years; range 20-93. years) who participated in the Geelong Osteoporosis Study were analysed for CTx and P1NP using the automated Roche Modular Analytics E170 analyser. Results: Optimal age-related reference intervals were based on the central 90 of the distribution. The male CTx reference interval was divided into three age groups. For men aged 25 to 40. years, the interval was 170-600. ng/L; 40 to 60. years, the interval was 130-600. ng/L; and for men aged greater 60. years the interval was 100-600. ng/L.For P1NP the male reference interval was 15-80. ?g/L for men aged between 25 to 70. years. In men greater than 70. years of age values were higher possibly due to increased bone turnover.High values are frequently seen for both CTx and P1NP in males aged younger than 25. years. This is probably due to bone growth that is not completely finalised.The female CTx reference interval was divided into four age groups. For women aged less than 30. years, the interval was 150-800. ng/L; 30-39. years, the interval was 100-700. ng/L; 40-49. years, the interval was 100-600. ng/L; and for women aged 50. years or more the interval was 100-700. ng/L.The female P1NP reference interval was divided into four age groups. For women aged less than 30. years, the interval was 25-90. ?g/L; 30-39. years, the interval was 15-80. ?g/L; 40-49. years, the interval was 15-60. ?g/L; and for women aged 50-69. years the interval was 15-75. ?g/L. In women greater than 70. years of age values were higher possibly due to increased bone turnover. Conclusion: Values obtained from this large study provide sound age-related reference intervals for serum P1NP and CTx values in the Australian popul
Original languageEnglish
Pages (from-to)271 - 276
Number of pages6
JournalBone
Volume55
Issue number2
DOIs
Publication statusPublished - 2013

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