Document Detail

Periconceptional multivitamin folic acid use, dietary folate, total folate and risk of neural tube defects in South Carolina.
MedLine Citation:
PMID:  12875798     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To investigate whether dietary folate or multivitamin folic acid taken 3 months before conception and during the first 3 months of pregnancy reduces the risk of isolated occurrent neural tube defect (NTD)-affected pregnancies. METHODS: This population-based case control study conducted between 1992 and 1997 included 179 women with NTD-affected pregnancies and 288 randomly selected controls. Women completed a food frequency questionnaire and were interviewed about lifestyle behaviors, pregnancy histories and use of multivitamins. RESULTS: Use of 0.4 mg or more of multivitamin folic acid at least 3 times per week during the periconceptional period showed no statistically significant reduction in NTD risk [adjusted odds ratio (AOR) = 0.55, 95% confidence interval (CI) = 025, 1.22]. After adjusting for covariates, protective effects for NTDs were observed at the highest quartiles of dietary folate and total folate (daily dietary folate plus daily multivitamin folic acid); the respective odds ratios were 0.40 (95% CI = 0.19, 0.84) and 0.35 (95% CI = 0.17, 0.72). CONCLUSIONS: This study illustrates some of the difficulties in determining effects of folic acid and dietary folate in a population where the consumption of foods rich in folate and the use of multivitamins are increasing and the rate of NTDs is declining. Studies are needed to monitor future changes in folate levels and their effect on health.
Shirley J Thompson; Myriam E Torres; Roger E Stevenson; Jane H Dean; Robert G Best
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Annals of epidemiology     Volume:  13     ISSN:  1047-2797     ISO Abbreviation:  Ann Epidemiol     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-07-23     Completed Date:  2003-11-26     Revised Date:  2008-06-23    
Medline Journal Info:
Nlm Unique ID:  9100013     Medline TA:  Ann Epidemiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  412-8     Citation Subset:  IM    
Department of Epidemiology and Biostatistics, Norman J. Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA.
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MeSH Terms
Case-Control Studies
Dietary Supplements*
Folic Acid / administration & dosage,  therapeutic use*
International Classification of Diseases
Interviews as Topic
Logistic Models
Neural Tube Defects / epidemiology,  prevention & control*
Odds Ratio
Preconception Care / methods*
Prenatal Care / methods*
Risk Factors
South Carolina / epidemiology
Vitamins / administration & dosage,  therapeutic use
Grant Support
U85/CCU#408774/CC/CDC HHS
Reg. No./Substance:
0/Vitamins; 59-30-3/Folic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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