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Vitamin D testing: advantages and limits of the current assays In this review, we performed a systematic analysis evaluating critically the advantages and limits of the current assays available for the measure of vitamin D status, i e , circulating 25 (OH)D and its metabolites, making suggestions that could be used in the clinical practice
Vitamin D: Current Challenges between the Laboratory and Clinical . . . This review summarizes several key analytical and clinical challenges that accompany the current methods for measuring vitamin D According to an external quality assessment, methods and laboratories still produce a high degree of variability
Testing vitamin D levels - PMC Routine VTD testing is not required or recommended; however, testing might be beneficial for some when clinically indicated: those with parathyroid disease, hypocalcemia, hypercalcemia, hyperphosphatemia, serious renal or liver disease, or malabsorption syndromes; those taking medications that affect VTD metabolism (eg, valproate) or absorption
Arneson, W. L. and Arneson, D. L. (2013) Current Methods for Routine . . . Blood was drawn for assessment of serum 25-hydroxyvitamin D 25 (OH)D, calcium, phosphorus and alkaline phosphate Vitamin D deficiency was defined as 25 (OH)D level below 20 ng ml (analysis was performed using STATA 14 version and factors associated with VDD explored with multivariate analysis
Testing Vitamin D Levels and Choosing Wisely - JAMA Network The Choosing Wisely campaign had also started issuing guidelines, including the American Society for Clinical Pathology recommendation to avoid performing vitamin D assays except for patients with higher-risk conditions (eg, osteoporosis, chronic kidney disease, and malabsorption) when results could be used to initiate more aggressive therapy
Vitamin D Measurement: Clinical Practice and Research Implications The laboratory assays used for vitamin D measurement, the definition of vitamin D deficiency, and appropriate treatment for vitamin D deficiency are all under scrutiny 8 Medical societies and international partnerships have developed clinical guidelines; however, differences still exist in the definitions of vitamin D deficiency, insufficiency