Journal
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
Volume 191, Issue 6, Pages 1851-1857Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.ajog.2004.07.076
Keywords
folate; preterm birth; dietary intake; supplement use; nutrition; pregnancy
Categories
Funding
- NIA NIH HHS [AG09525] Funding Source: Medline
- NICHD NIH HHS [HD28684, HD05798] Funding Source: Medline
- NIDDK NIH HHS [DK56350, DK55865] Funding Source: Medline
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Objective: The purpose of this study was to show that maternal folate status during pregnancy may be related to preterm birth. Study design: Women were recruited at 24 to 29 weeks' gestation from 1995 to 2000 into the Pregnancy, Infection, and Nutrition Study. Those who completed an interview and a food frequency questionnaire, or provided a blood sample for radioassay of serum (n = 2026) and red blood cell (n = 1034) folate were included. Results: Mean daily dietary folate intake was 463 mug (SD +/- 243). Intake less than or equal to500 mug was associated with increased preterm delivery (RR = 1.8, 95% Cl 1.4-2.6) controlling for total energy intake. kerum folate levels < 16.3 ng/mL and red blood cell folate levels less than or equal to 626.6 yielded adjusted risk ratios of 1.8 (95% Cl 1.3-2.5) and 1.7 (95% Cl 1.1-2.6). respectively. Patterns were Similar for spontaneous and overall preterm birth. Conclusion: These results Support the hypothesis that low folate levels during the second trimester of pregnancy are associated with an increased risk of preterm birth. (C) 2004 Elsevier Inc. All rights reserved.
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