1 – Program overview

This external quality assessment program assesses the accuracy of the assay of one of the serum markers used in the monitoring of osteoporosis: Cross Laps (CTX), the C-terminal telopeptide of type I collagen.

2 – Assessment frequency

Number of surveys per year: 4
Number of control samples per survey: 1 or 2
Number of samples per year: 6

3 – List of analytes assessed 

• CTX (Cross Laps)

4 – Description of the control samples

Lyophilised human control serum (samples to be resuspended in 1 mL of distilled water).