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Research Article

Standardization of measurements of 25-Hydroxyvitamin D3 and D2

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Pages 41-49 | Published online: 26 Apr 2012

Figures & data

Figure 1. The development and implementation of evidence-based clinical guidelines depends on the comparability of tests performed in research and patient care. Adopted (and modified) from CP Price and RH Christenson (eds): [Citation6].

Figure 1. The development and implementation of evidence-based clinical guidelines depends on the comparability of tests performed in research and patient care. Adopted (and modified) from CP Price and RH Christenson (eds): [Citation6].

Figure 2. Stevps to laboratory standardization.

Figure 2. Stevps to laboratory standardization.

Table I. Overview of the elements of an SI-reference measurement system, with indication of the related tasks and responsibilities.

Figure 3. Outline of the reference measurement system for serum/plasma 25(OH)D.

Figure 3. Outline of the reference measurement system for serum/plasma 25(OH)D.

Table II. Recommendation for maximum imprecision (CV), bias and expanded uncertainty (U) of measurements and primary calibrators in a 25(OH)D reference measurement system [Citation41].

Figure 4. Procedure for standardization and performance certification.

Figure 4. Procedure for standardization and performance certification.

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