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Original Article

Biological variation of holotranscobalamin and cobalamin in healthy individuals

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Pages 433-436 | Received 05 Apr 2017, Accepted 24 May 2017, Published online: 02 Jul 2017

References

  • Fraser CG, Harris EK. Generation and application of data on biological variation in clinical chemistry. Crit Rev Clin Lab Sci 1989;27:409–37.
  • Nexo E, Hvas AM, Bleie O, Refsum H, Fedosov SN, Vollset SE, Schneede J, Nordrehaug JE, Ueland PM, Nygard OK. Holo-transcobalamin is an early marker of changes in cobalamin homeostasis. A randomized placebo-controlled study. Clin Chem 2002;48:1768–71.
  • McCaddon A, Hudson P, McCracken C, Ellis R, McCaddon A. Biological variation of holo-transcobalamin in elderly individuals. Clin Chem 2003;49:1542–4.
  • Bor MV, Nexo E, Hvas AM. Holo-transcobalamin concentration and transcobalamin saturation reflect recent vitamin B12 absorption better than does serum vitamin B12. Clin Chem 2004;50:1043–9.
  • McArthur JO, Tang H, Petocz P, Samman S. Biological variability and impact of oral contraceptives on vitamins B(6), B(12) and folate status in women of reproductive age. Nutrients 2013;5:3634–45.
  • Midttun O, Townsend MK, Nygard O, Tworoger SS, Brennan P, Johansson M, Ueland PM. Most blood biomarkers related to vitamin status, one-carbon metabolism, and the kynurenine pathway show adequate preanalytical stability and within-person reproducibility to allow assessment of exposure or nutritional status in healthy women and cardiovascular patients. J Nutr 2014;144:784–90.
  • McKinley MC, Strain JJ, McPartlin J, Scott JM, McNulty H. Plasma homocysteine is not subject to seasonal variation. Clin Chem 2001;47:1430–6.
  • Braga F, Panteghini M. Generation of data on within-subject biological variation in laboratory medicine: an update. Crit Rev Clin Lab Sci 2016;53:313–25.
  • Bartlett WA, Braga F, Carobene A, Coskun A, Prusa R, Fernandez-Calle P, Roraas T, Jonker N, Sandberg S. A checklist for critical appraisal of studies of biological variation. Clin Chem Lab Med 2015;53:879–85.
  • Roraas T, Petersen PH, Sandberg S. Confidence intervals and power calculations for within-person biological variation: effect of analytical imprecision, number of replicates, number of samples, and number of individuals. Clin Chem 2012;58:1306–13.
  • Fraser CG. Biological variation: from principles to practice. Washington (DC): AACC Press; 2001.
  • Fraser CG, Hyltoft Petersen P, Libeer JC, Ricos C. Proposals for setting generally applicable quality goals solely based on biology. Ann Clin Biochem 1997;34:8–12.
  • R Development Core Team. R: a language and environment for statistical computing. Vienna, Austria: R Foundation for Statistical Computing; 2016. Available from: www.R-project.org/
  • Bates D, Mächler M, Bolker B, Walker S. Fitting linear mixed-effects models using lme4. J Stat Softw 2015;67:1–48.
  • Desirable Biological Variation Database specifications; 2017 [cited 5 Jan 2017]. Available from: https://www.westgard.com/biodatabase1.htm
  • Carobene A. Reliability of biological variation data available in an online database: need for improvement. Clin Chem Lab Med 2015;53:871–7.

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