1 - Scheme Overview

This external quality assessment scheme assesses the accuracy of the assay of 2 serum markers used in the monitoring of osteoporosis: C-terminal telopeptide (CTX) and P1NP.

This External Quality Assessment is proposed by all the Interlaboratory Comparison Organizations members of the French Federation of EQA (F.A.E.E.Q.).

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 (C-terminal telopeptide)
• P1NP

4 - Description of the Control Samples

Human origin control serums in lyophilized form (samples to be resuspended in 3 mL of distilled water).