OBJECTIVES: The performance of recently developed vitamin D total assays (ADVIA Centaur and Elecsys) was compared to that of liquid chromatography-tandem mass spectrometry (LC-MS/MS) and LIASON 25-OH Vitamin D total assays. DESIGN AND METHODS: A total of 157 clinical samples and standard reference material (SRM) 972 were analyzed. RESULTS: The correlations of LC-MS/MS with the three immunoassays were acceptable. However, compared to LC-MS/MS, LIAISON and ADVIA Centaur showed negative bias, and Elecsys showed positive bias. There was a lack of agreement among the four methods with only LC-MS/MS results close to the certified values of SRM 972. The prevalence of vitamin D insufficiency (<50 nmol/L) was higher with ADVIA Centaur (51.6%) and LIAISON (52.2%) and lower with Elecsys (37.6%), compared with that of LC-MS/MS (44.6%). CONCLUSION: The new, automated total vitamin D assays show acceptable correlation with LC-MS/MS, and could be used in routine laboratories. However, standardization of vitamin D assays and consideration of assay-specific decision limits should be addressed.
OBJECTIVES: The performance of recently developed vitamin D total assays (ADVIA Centaur and Elecsys) was compared to that of liquid chromatography-tandem mass spectrometry (LC-MS/MS) and LIASON 25-OH Vitamin D total assays. DESIGN AND METHODS: A total of 157 clinical samples and standard reference material (SRM) 972 were analyzed. RESULTS: The correlations of LC-MS/MS with the three immunoassays were acceptable. However, compared to LC-MS/MS, LIAISON and ADVIA Centaur showed negative bias, and Elecsys showed positive bias. There was a lack of agreement among the four methods with only LC-MS/MS results close to the certified values of SRM 972. The prevalence of vitamin Dinsufficiency (<50 nmol/L) was higher with ADVIA Centaur (51.6%) and LIAISON (52.2%) and lower with Elecsys (37.6%), compared with that of LC-MS/MS (44.6%). CONCLUSION: The new, automated total vitamin D assays show acceptable correlation with LC-MS/MS, and could be used in routine laboratories. However, standardization of vitamin D assays and consideration of assay-specific decision limits should be addressed.
Authors: Karen W Phinney; Johanna E Camara; Susan S-C Tai; Lane C Sander; Stephen A Wise; Linde A C De Grande; Linda M Thienpont; Antonio M Possolo; Blaza Toman; Christopher T Sempos; Joseph M Betz; Paul M Coates Journal: J AOAC Int Date: 2017-06-16 Impact factor: 1.913
Authors: Barbara Altieri; Etienne Cavalier; Harjit Pal Bhattoa; Faustino R Pérez-López; María T López-Baena; Gonzalo R Pérez-Roncero; Peter Chedraui; Cedric Annweiler; Silvia Della Casa; Sieglinde Zelzer; Markus Herrmann; Antongiulio Faggiano; Annamaria Colao; Michael F Holick Journal: Eur J Clin Nutr Date: 2020-01-06 Impact factor: 4.016