Prevalence and determinants of inadequate use of folic acid supplementation in Japanese pregnant women: the Japan Environment and Children’s Study (JECS)

References

• MRC Vitamin Study Research Group. Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. Lancet 1991;338:131–7
   PubMed Web of Science ®Google Scholar
• Werler MM, Louik C, Mitchell AA. Achieving a public health recommendation for preventing neural tube defects with folic acid. Am J Public Health 1999;89:1637–40.
   PubMed Web of Science ®Google Scholar
• International Clearinghouse for Birth Defects Surveillance and Research. Annual report 2013. Available from: http://www.icbdsr.org/filebank/documents/ar2005/Report2013.pdf [last accessed 27 Jan 2016].
   Google Scholar
• Food Standards Australia New Zealand Folic Acid Fortification User Guide. Available from: http://www.foodstandards.gov.au/code/userguide/Documents/Mandatory%20Folic%20Acid%20Fortification%20User%20Guide.pdf [last accessed 27 Jan 2016].
   Google Scholar
• Botto LD, Lisi A, Bower C, et al. Trends of selected malformations in relation to folic acid recommendations and fortification: an international assessment. Birth Defects Res A Clin Mol Teratol 2006;76:693–705.
   PubMed Web of Science ®Google Scholar
• Kondo A, Asada Y, Shibata K, et al. Dietary folate intakes and effects of folic acid supplementation on folate concentrations among Japanese pregnant women. J Obstet Gynaecol Res 2011;37:331–6.
   PubMed Web of Science ®Google Scholar
• Kawamoto T, Nitta H, Murata K, et al. Working Group of the Epidemiological Research for Children’s Environmental Health. Rationale and study design of the Japan environment and children’s study (JECS). BMC Public Health 2014;14:25.
   PubMed Web of Science ®Google Scholar
• Shaw GM, Schaffer D, Velie EM, et al. Periconceptional vitamin use, dietary folate, and the occurrence of neural tube defects. Epidemiology 1995;6:219–26.
   PubMed Web of Science ®Google Scholar
• Xing XY, Tao FB, Hao JH, et al. Periconceptional folic acid supplementation among women attending antenatal clinic in Anhui, China: data from a population-based cohort study. Midwifery 2012;28:291–7.
   PubMed Web of Science ®Google Scholar
• Timmermans S, Jaddoe VW, Mackenbach JP, et al. Determinants of folic acid use in early pregnancy in a multi-ethnic urban population in The Netherlands: the Generation R study. Prev Med 2008;47:427–32.
   PubMed Web of Science ®Google Scholar
• Nilsen RM, Vollset SE, Gjessing HK, et al. Patterns and predictors of folic acid supplement use among pregnant women: the Norwegian Mother and Child Cohort Study. Am J Clin Nutr 2006;84:1134–41.
   PubMed Web of Science ®Google Scholar
• Forster DA, Wills G, Denning A, Bolger M. The use of folic acid and other vitamins before and during pregnancy in a group of women in Melbourne, Australia. Midwifery 2009;25:134–46.
   PubMed Web of Science ®Google Scholar
• de Jong-Van den Berg LT, Hernandez-Diaz S, Werler MM, et al. Trends and predictors of folic acid awareness and periconceptional use in pregnant women. Am J Obstet Gynecol 2005;192:121–8.
   PubMed Web of Science ®Google Scholar
• Morin P, De Wals P, St-Cyr-Tribble D, et al. Pregnancy planning: a determinant of folic acid supplements use for the primary prevention of neural tube defects. Can J Public Health 2002;93:259–63.
   PubMed Web of Science ®Google Scholar
• Feldkamp M, Friedrichs M, Marti K. Folic acid awareness, knowledge, and consumption among women of childbearing age in Utah, 1998–2000. Am J Med Genet 2002;107:67–9.
   PubMed Web of Science ®Google Scholar
• Kondo A, Yamamoto S, Inoue H, et al. Folic acid in the prevention of neural tube defects: awareness among laywomen and healthcare providers in Japan. Congenit Anom (Kyoto) 2009;49:97–101.
   PubMedGoogle Scholar
• McDonnell R, Johnson Z, Doyle A, Sayers G. Determinants of folic acid knowledge and use among antenatal women. J Public Health Med 1999;21:145–9.
   PubMedGoogle Scholar
• Sen S, Manzoor A, Deviasumathy M, Newton C. Maternal knowledge, attitude and practice regarding folic acid intake during the periconceptional period. Public Health Nutr 2001;4:909–12.
   PubMed Web of Science ®Google Scholar
• Cleves MA, Hobbs CA, Collins HB, et al. Folic acid use by women receiving routine gynecologic care. Obstet Gynecol 2004;103:746–53.
   PubMed Web of Science ®Google Scholar
• Knudsen VK, Orozova-Bekkevold I, Rasmussen LB, et al. Low compliance with recommendations on folic acid use in relation to pregnancy: is there a need for fortification? Public Health Nutr 2004;7:843–50.
   PubMed Web of Science ®Google Scholar
• Carmichael SL, Shaw GM, Yang W, et al. National Birth Defects Prevention Study. Correlates of intake of folic acid-containing supplements among pregnant women. Am J Obstet Gynecol 2006;194:203–10.
   PubMed Web of Science ®Google Scholar
• Rosenberg KD, Gelow JM, Sandoval AP. Pregnancy intendedness and the use of periconceptional folic acid. Pediatrics 2003;111:1142–5.
   PubMed Web of Science ®Google Scholar
• Morin P, De Wals P, Noiseux M, et al. Pregnancy planning and folic acid supplement use: results from a survey in Quebec. Prev Med 2002;35:143–9.
   PubMed Web of Science ®Google Scholar
• Kim MH, Han JY, Cho YJ, et al. Factors associated with a positive intake of folic acid in the periconceptional period among Korean women. Public Health Nutr 2009;12:468–71.
   PubMed Web of Science ®Google Scholar
• Coll O, Pisa S, Palacio M, et al. Awareness of the use of folic acid to prevent neural tube defects in a Mediterranean area. Eur J Obstet Gynecol Reprod Biol 2004;115:173–7.
   PubMed Web of Science ®Google Scholar
• Tamim H, Harrison G, Atoui M, et al. National Collaborative Perinatal Neonatal Network (NCPNN). Preconceptional folic acid supplement use in Lebanon. Public Health Nutr 2009;12:687–92.
   PubMed Web of Science ®Google Scholar
• Charles DH, Ness AR, Campbell D, et al. Folic acid supplements in pregnancy and birth outcome: re-analysis of a large randomised controlled trial and update of Cochrane review. Paediatr Perinat Epidemiol 2005;19:112–24.
   PubMed Web of Science ®Google Scholar
• Mantovani E, Filippini F, Bortolus R, Franchi M. Folic acid supplementation and preterm birth: results from observational studies. Biomed Res Int 2014;481914.
   PubMed Web of Science ®Google Scholar
• Roth C, Magnus P, Schjølberg S, et al. Folic acid supplements in pregnancy and severe language delay in children. JAMA 2011;306:1566–73.
   PubMed Web of Science ®Google Scholar
• Schlotz W, Jones A, Phillips DI, et al. Lower maternal folate status in early pregnancy is associated with childhood hyperactivity and peer problems in offspring. J Child Psychol Psychiatry 2010;51:594–602.
   PubMed Web of Science ®Google Scholar