The direction of the difference between Canadian and American erythrocyte folate concentrations is dependent on the assay method employed: A comparison of the Canadian Health Measures Survey and National Health and Nutrition Examination Survey

British Journal of Nutrition

Volumn 112, Issue 11, 2014, Pages 1873-1881

  Colapinto, Cynthia K ^a,b   Tremblay, Mark S ^a,b   Aufreiter, Susanne ^c   Bushnik, Tracey ^d   Pfeiffer, Christine M ^e   O'Connor, Deborah L ^c,f  

^a CHILDREN S HOSPITAL OF EASTERN ONTARIO   (Canada)

^b UNIVERSITY OF OTTAWA   (Canada)

^c HOSPITAL FOR SICK CHILDREN   (Canada)

^d STATISTICS CANADA   (Canada)

^e NATIONAL CENTER FOR ENVIRONMENTAL HEALTH   (United States)

^f UNIVERSITY OF TORONTO   (Canada)

Author keywords

Canadian Health Measures Survey; Erythrocyte folate; Folate status; Folic acid; National Health and Nutrition Examination Survey

Indexed keywords

FOLIC ACID;

ADOLESCENT; ADULT; AGED; AMERICAN; ARTICLE; CANADIAN; CHILD; COMPARATIVE STUDY; CONTROLLED STUDY; ERYTHROCYTE LEVEL; FEMALE; HEALTH SURVEY; HUMAN; IMMUNOASSAY; MALE; MICROBIOLOGY; BLOOD; BLOOD ANALYSIS; CANADA; DIET SUPPLEMENTATION; ERYTHROCYTE; METABOLISM; MICROBIOLOGICAL EXAMINATION; MIDDLE AGED; NUTRITION; PROCEDURES; UNITED STATES; YOUNG ADULT;

ADOLESCENT; ADULT; AGED; BLOOD CHEMICAL ANALYSIS; CANADA; CHILD; ERYTHROCYTES; FEMALE; FOLIC ACID; FOOD, FORTIFIED; HUMANS; IMMUNOASSAY; MALE; MICROBIOLOGICAL TECHNIQUES; MIDDLE AGED; NUTRITION SURVEYS; UNITED STATES; YOUNG ADULT;

EID: 84925581529     PISSN: 00071145     EISSN: 14752662     Source Type: Journal    
DOI: 10.1017/S0007114514002906     Document Type: Article

References (42)

1. Food and Drug Administration (1996) Food standards: amendment of standards of identity for enriched grain products to require addition of folic acid. Final rule. 21 CFR Parts 136, 137, and 139. Fed Regist 61, 8781-8789.
2. Canada Gazette (1996)Foodanddrug regulations - amendment SOR/96-527. Canada Gazette Part II. http://publications. gc.ca/gazette/archives/p2/1998/1998-11-25/pdf/g2-13224.pdf (accessed March 2014).
3. Berry RJ, Mulinare J & Hamner H (2010) Folic acid fortification: neural tube defect risk reduction - a global perspective. In Folate in Health and Disease, 2nd ed., pp. 179-204 [LB Bailey, editor]. Boca Raton, FL: CRC Press, Taylor & Francis Group.
4. Czeizel AE & Dudas I (1992) Prevention of the first occurrence of neural-tube defects by periconceptional vitamin supplementation. N Engl J Med 327, 1832-1835.
5. MRC Vitamin Study Research Group (1991) Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. Lancet 338, 131-137.
6. De Wals P, Tairou F, Van Allen MI, et al. (2007) Reduction in neural-tube defects after folic acid fortification in Canada. N Engl J Med 357, 135-142.
7. Williams LJ, Rasmussen SA, Flores A, et al. (2005) Decline in the prevalence of spina bifida and anencephaly by race/ethnicity: 1995-2002. Pediatrics 116, 580-586.
8. Centers for Disease Control and Prevention (CDC) (2010) CDC Grand Rounds: additional opportunities to prevent neural tube defects with folic acid fortification. MMWR Morb Mortal Wkly Rep 59, 980-984.
9. Flour Fortification Initiative (2012) Global Progress Mandatory Wheat Flour Fortification Legislation - August 2012. Ottawa, ON: Flours Fortification Initiative. http://www.ffinetwork.org/global-progress/index.php (accessed 11 December 2012).
10. Crider KS, Bailey LB & Berry RJ (2011) Folic acid food fortification - its history, effect, concerns, and future directions. Nutrients 3, 370-384.
11. 12, Pantothenic Acid, Biotin, and Choline. Washington, DC: National Academy Press.
12. Health Canada (2014) Prenatal Nutrition Guidelines for Health Professionals - Folate Contributes to a Healthy Pregnancy. Ottawa, ON: Health Canada. http://www.hc-sc.gc.ca/fn-an/pubs/nutrition/folate-eng.php (accessed March 2014).
13. Yetley EA & Johnson CL (2011) Folate and vitamin B-12 biomarkers in NHANES: history of their measurement and use. Am J Clin Nutr 94, 322S-331S.
14. Colapinto CK, O'Connor DL & Tremblay MS (2011) Folate status of the population in the Canadian health measures survey. CMAJ 183, E100-E106.
15. Pfeiffer CM, Hughes JP, Lacher DA, et al. (2012) Estimation of trends in serum and RBC folate in the U.S. population from pre-to postfortification using assay-adjusted data from the NHANES 1988-2010. J Nutr 142, 886-893.
16. Dietrich M, Brown CJ & Block G (2005) The effect of folate fortification of cereal-grain products on blood folate status, dietary folate intake, and dietary folate sources among adult non-supplement users in the United States. J Am Coll Nutr 24, 266-274.
17. Gunter EW, Bowman BA, Caudill SP, et al. (1996) Results of an international round robin for serum and whole-blood folate. Clin Chem 42, 1689-1694.
18. Owen WE & Roberts WL (2003) Comparison of five automated serum and whole blood folate assays. Am J Clin Pathol 120, 121-126.
19. Fazili Z, Pfeiffer CM, Zhang M, et al. (2008) Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole-blood folate concentrations measured by LC-MS/MS, microbiologic assay, and Bio-Rad radioassay. Clin Chem 54, 197-201.
20. Pfeiffer CM, Zhang M, Lacher DA, et al. (2011) Comparison of serum and red blood cell folate microbiologic assays for national population surveys. J Nutr 141, 1402-1409.
21. 5-methyltetrahydrofolate concentrations and C677T methylenetetrahydrofolate reductase genotype in patients with stroke. J Clin Pathol 57, 54-57.
22. Bryan S, St-Denis M & Wojtas D (2007) Canadian Health Measures Survey: clinic operations and logistics. Health Rep 18, Suppl., 53-70.
23. Centres for Disease Control and Prevention (2014) About the National Health and Nutrition Examination Survey. Washington, DC: Centres for Disease Control and Prevention. http://www.cdc.gov/nchs/nhanes/about-nhanes.htm (accessed 13 May 2013).
24. Day B, Langlois R & Tremblay M (2007) Canadian Health Measures Survey: ethical, legal and social issues. Health Rep 18, Suppl., 37-51.
25. McNulty B, Pentieva K, Marshall B, et al. (2011) Women's compliance with current folic acid recommendations and achievement of optimal vitamin status for preventing neural tube defects. Hum Reprod 26, 1530-1536.
26. Centres for Disease Control and Prevention (2008) Laboratory procedure manual: folate. http://www.cdc.gov/nchs/data/nhanes/nhanes-07-08/FOLATE-E-met.pdf (accessed 22 September 2012).
27. Siemens Canada Limited (2009) Immulite 2000 Folic Acid Insert. Mississauga, ON: Siemens Canada Limited.
28. Centres for Disease Control and Prevention (2011) National Health and Nutrition Examination Survey: 2007-2008, Data Documentation, Codebook, and Frequencies: RBC Folate and Serum Folate. Washington, DC: Centres for Disease Control and Prevention. http://www.cdc.gov/nchs/nhanes/nhanes2007-2008/FOLATE-E.htm#LBXRBFSI. (accessed 13 May 2013).
29. 12 status. Food Nutr Bull 29, S67-S73.
30. Statistics Canada (2007) Questionnaire(s) and Reporting Guide(s) - Canadian Health Measures Survey (CHMS). Ottawa, ON: Statistics Canada. http://www23.statcan.gc.ca/imdb/p2SV.pl?Function=getSurvInstrument&SurvId=9353& InstaId=10263 (accessed 10 June 2014).
31. Health Canada (2013) Drug Product Database. Ottawa, ON: Health Canada. http://www.hc-sc.gc.ca/dhp-mps/prodpharma/databasdon/index-eng.php (accessed 13 May 2013).
32. Health Canada (2014) Licensed Natural Health Products Database. Ottawa, ON: Health Canada. http://www.hc-sc. gc.ca.proxy.bib.uottawa.ca/dhp-mps/prodnatur/applications/licen-prod/lnhpd-bdpsnh-data-extract-eng.php (accessed 13 May 2013).
33. Good PI & Hardin JW (2009) Common Errors in Statistics (and How to Avoid Them). Hoboken, NJ: John Wiley and Sons, Inc.
34. Ludbrook J (2002) Statistical techniques for comparing measurers and methods of measurement: a critical review. Clin Exp Pharmacol Physiol 29, 527-536.
35. Linnet K (1993) Evaluation of regression procedures for methods comparison studies. Clin Chem 39, 424-432.
36. Linnet K (1990) Estimation of the linear relationship between the measurements of two methods with proportional errors. Stat Med 9, 1463-1473.
37. Rust K & Rao J (1996) Variance estimation for complex surveys using replication techniques. Stat Methods Med Res 5, 281-310.
38. Colapinto CK, O'Connor DL, Dubois L, et al. (2012) Folic acid supplement use is the most significant predictor of folate concentrations in Canadian women of childbearing age. Appl Physiol Nutr Metab 37, 284-292.
39. Shakur YA, Garriguet D, Corey P, et al. (2010) Folic acid fortification above mandated levels results in a low prevalence of folate inadequacy among Canadians. Am J Clin Nutr 92, 818-825.
40. Tinker SC, Cogswell ME, Devine O, et al. (2010) Folic acid intake among U.S. women aged 15-44 years, National Health and Nutrition Examination Survey, 2003-2006. Am J Prev Med 38, 534-542.
41. Pfeiffer CM, Hughes JP, Durazo-Arvizu RA, et al. (2012) Changes in measurement procedure from a radioassay to a microbiologic assay necessitate adjustment of serum and RBC folate concentrations in the U.S. population from the NHANES 1988-2010. J Nutr 142, 894-900.
42. Sempos CT, Vesper HW, Phinney KW, et al. (2012) Vitamin D status as an international issue: national surveys and the problem of standardization. Scand J Clin Lab Invest Suppl 243, 32-40.