Determinants of folic acid use in a multi-ethnic population of pregnant women: a cross-sectional study

Aims: To investigate the possible differences in folic acid use and to identify the determinants of antenatal folic acid use among multi-ethnic pregnant women. Methods: Three hundred and fifty pregnant women participated in this cross-sectional study in a university hospital in Brussels, Belgium. A questionnaire was used to obtain data on socio-demographic characteristics and folic acid use chi(2)-tests and binary logistic regression analyses were performed using SPSS 17. Results: In the overall cohort, 59.2% used folic acid supplements during pregnancy. This supplement use was associated with an age of 26-35 years, being of Western origin, with high education and employment status, understanding physician's instructions, and early booking for antenatal care. Education (odds ratio, OR: 2.24; 95% confidence interval, CI: 1.08-4.63) and early booking for antenatal care OR: 2.45; 95% CI: 1.11-5.40) were the most important determinants. In particular for Arab/Turkish women, a lower employment status OR: 0.42; 95% CI: 0.24-0.73) was associated with a higher risk of not using folic acid supplements. Conclusions: The lower use of folic acid supplements in Arab/Turkish ethnicities, which may be associated with an increased risk of neural tube defects, is related to socio-economic factors rather than to lower educational attainment. As recommended by other studies, fortification of ethnic minority food may be warranted to reduce the risk of neural tube defects.