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  • Title: Evaluation of 25 OH Vitamin D in chronic renal failure and end stage renal disease subjects.
    Author: MacFarlane GD, Sackrison JL, Ersfeld DL, Miller AB, Bucklen A.
    Journal: J Steroid Biochem Mol Biol; 2004 May; 89-90(1-5):619-20. PubMed ID: 15225850.
    Abstract:
    Analysis of laboratory samples from chronic renal failure (CRF) and end stage renal disease (ESRD) patients can be problematic. Current HPLC and RIA methods for the determination of 25 OH Vitamin D involve sample extraction. However, the differences between a normal and CRF or ESRD matrix can lead to interference or inaccuracy in non-extracted, automated methods now available. The objective of this study was to assess the accuracy of the non-extracted LIAISON 25 OH Vitamin D assay in the analysis of CRF and ESRD samples as compared against RIA as reference. Samples were collected from regional reference laboratories and analyzed in both the LIAISON 25 OH Vitamin D assay and the DiaSorin 25 OH Vitamin D RIA. By Student's t test, no significant difference was observed between the RIA values and the LIAISON values (P = 0.07 CRF; P = 0.28 ESRD). The linear regression analysis resulted in the equations: CRF: LIAISON = 0.91 (RIA) + 0.6; r = 0.82 and ESRD: LIAISON = 0.93 (RIA) - 0.6; r = 0.78. From these data we conclude that the LIAISON 25 OH Vitamin D assay correctly assesses the 25 OH Vitamin D status of CRF and ESRD patients.
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