Observational studyNutrients2019
Low Prevalence of Folic Acid Supplementation during Pregnancy: A Multicenter Study in Vietnam.
Observational study in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 13 citations in OpenAlex.
- Does previous pregnancy experience improve folic acid supplementation uptake? A systematic review and meta-analysis.BMJ open · 2026Pooled it
- Folic acid supplementation during preconception period in sub-Saharan African countries: A systematic review and meta-analysis.PloS one · 2025Pooled it
- Needs, Challenges, and Opportunities for Genetic Counselors in Vietnam: A Qualitative Interview Study With Healthcare Leaders and Genetics Professionals.Journal of genetic counseling · 2026Article
- Biological, dietetic and pharmacological properties of vitamin BNPJ science of food · 2025Review
- Preconceptional and Periconceptional Folic Acid Supplementation in the Visegrad Group Countries for the Prevention of Neural Tube Defects.Nutrients · 2024Review
- Association between fish and shellfish consumption, n-3 polyunsaturated fatty acids, and gastric cancer risk: the Japan Public Health Center-based Prospective Study.European journal of nutrition · 2024Article
- Awareness of Nutrition and Supplements Among Pregnant and Preconception Women: A Real-World Study in Vietnam.Women's health reports (New Rochelle, N.Y.) · 2023Article
- Women's holistic self-care behaviors during pregnancy and associations with psychological well-being: implications for maternal care facilities.BMC pregnancy and childbirth · 2022Article
- Knowledge and intake of folic acid to prevent neural tube defects among pregnant women in urban China: a cross-sectional study.BMC pregnancy and childbirth · 2021Article
- Knowledge and awareness of folic acid usage in Saudi pregnant women in Riyadh city from 2019-2020.Journal of family medicine and primary care · 2020Article
- Periconceptional folic acid usage and its associated factors in eastern Sudan: A cross-sectional study.Women's health (London, England)Article
- Does Folic Acid Intake Play Role as a Potential Indicator of Modifiable Maternal Risk Factors in Preconception Period?: A Cross-Sectional Study.Women's health reports (New Rochelle, N.Y.)Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
Periconceptional folic acid (FA) supplementation is recommended to prevent neural tube defects (NTDs), but little information is known about its use in Vietnam. It is important that FA supplements start to be taken when planning a pregnancy and continued through the first trimester to prevent NTDs, as the neural tube closes in the first month of pregnancy. However, FA supplementation in Vietnam is usually recommended to commence from the first antenatal visit, which is usually at 16 weeks, and very few women take FA before their first visit. This multicenter study aimed to determine the prevalence of FA supplement use and associated maternal characteristics in Vietnam. FA supplementation was assessed in 2030 singleton pregnant women between 2015 and 2016. In total, 654 (32.2%) women reported taking either supplements containing FA alone or multivitamins containing FA, and 505 (24.9%) reported correctly taking supplements containing FA alone. Women who were aged 30 years or over, had low education levels, had formal employment, and whose current pregnancy was first or unplanned were less likely to supplement with FA. Education programs are needed to encourage FA supplementation when contemplating pregnancy.
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Registered trials
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