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There is increasing requests of Vitamin D test in many clinical settings in recent years. However, immunoassay performance is still a controversial topic. Several diagnostic manufacturers have launched automated 25-hydroxyvitamin D (25-OH D) immunoassays in the past decade. We compared the performance of Abbott Architect 25-OH D Vitamin immunoassay with liquid chromatography-tandem mass spectrometry systems (LCMS/MS) to evaluate immunoassay performance, especially in deficient groups.

Assessment of abbott architect 25-oh vitamin D assay in different levels of vitamin D