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Vitamin D Testing

Analytical & Clinical Conundrums


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Quality of the 25-OH Vitamin D Testing

Slide 12

January 2009

This slide shows the data from 2007. The first column shows various methods available for 25-hydroxyvd testing. The next column shows the various number of labs participating in this survey and the number of labs using a particular technology. For example, there are 20 labs using LC-MS method. The mean value obtained by using LC method was 50.8, the standard deviation among labs using LC method was 9.3, leading to the coefficient variation of 18.2.

Quality of Testing


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