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Folate of pregnant women after a nationwide folic acid supplementation in China.

ABSTRACT: Folate insufficiency during the periconceptional period increases the risk of neural tube defects (NTDs) in offspring, and folic acid supplementation substantially reduces the risk. Widespread large-scale folic acid supplementation (0.4-mg folic acid tablet) has been adopted as a main strategy to prevent NTDs in China since 2009. We examined folate concentrations in plasma and red blood cells (RBCs) of pregnant women and the factors associated with blood folate concentrations in a population with a high prevalence of NTDs in northern China. A cross-sectional survey was conducted in 2014, and 1,107 pregnant women were recruited from 11 county or city maternal and child health centres across Shanxi province. Microbiological assays were used to determine folate concentrations. Factors associated with blood folate insufficiency were identified. The median (25th and 75th percentiles) folate concentrations were 28.4 (17.6, 45.2) nmol L-1 and 1,001.2 (658.7, 1,402.5) nmol L-1 in plasma and RBCs, respectively. According to the proposed RBC (906 nmol L-1 ) concentrations for optimal NTD prevention, 42.4% participants had RBC folate insufficiency. Rural women had a higher proportion of folate insufficiency than urban women. Folic acid supplementation was the only factor associated with RBC folate insufficiency. A large proportion of women had RBC folate concentrations that are not optimal for the prevention of NTDs despite free access to folic acid supplements. Actions that aim to improve folic acid supplementation compliance are needed to reach the full potential of the nationwide folic acid supplementation programme in terms of NTD prevention.

SUBMITTER: Zhang X

PROVIDER: S-EPMC6859985 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Folate of pregnant women after a nationwide folic acid supplementation in China.

Zhang Xuejuan X Liu Jufen J Jin Yongsheng Y Yang Shuang S Song Zhijiao Z Jin Lei L Wang Linlin L Ren Aiguo A

Maternal & child nutrition 20190523 4

Folate insufficiency during the periconceptional period increases the risk of neural tube defects (NTDs) in offspring, and folic acid supplementation substantially reduces the risk. Widespread large-scale folic acid supplementation (0.4-mg folic acid tablet) has been adopted as a main strategy to prevent NTDs in China since 2009. We examined folate concentrations in plasma and red blood cells (RBCs) of pregnant women and the factors associated with blood folate concentrations in a population wit ...[more]

PMID: 30970178

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Project description:BACKGROUND:Despite the supplementation of iron-folic acid is the recommended strategy during the antenatal period; iron deficiency anemia is the commonest hematologic complication during pregnancy. Therefore, this systematic review and meta-analysis aimed to assess the level of adherence to iron-folic acid supplementation and its associated factors among pregnant women in Ethiopia. METHODS:Systematic review and meta-analysis guideline was followed for this study. Different online databases were used for the review: PubMed, HINARI, EMBASE, Google Scholar and African Journals Online. Different searching terms were applied based on the adapted PICO principles to achieve and access all the essential articles. The data were entered and analyzed using Microsoft Excel and Stata 11 software respectively. RESULTS:Fifteen studies were included in this systematic review and meta-analysis with a total of 5808 pregnant women. The overall pooled prevalence of adherence to iron-folic acid supplementation among pregnant women in Ethiopia was 41.38% (95% CI: 33.09, 49.67). Having secondary and above educational status of the women (AOR:2.68,95%CI:1.25, 5.74), having an early registration of antenatal care follow-up (?16?weeks) (AOR:2.54,95%CI:1.99, 3.24), having anemia complication during current pregnancy (AOR:3.01,95%CI:1.88, 4.81), having good knowledge of iron-folic acid supplementation (AOR: 2.96, 95%CI:1.76, 4.99), having four times or more antenatal care follow up (AOR:3.66, 95%CI:2.81, 4.77), getting health education about benefit of iron and folic acid (AOR:2.62,95%CI:1.46,4.72), and having good knowledge about anemia (AOR:2.99,95%CI:2.32, 3.85) were associated risk factors for adherence to iron-folic acid supplementation. CONCLUSION:The overall pooled prevalence adherence of IFAS among pregnant women was lower than the WHO recommendations. Educational status, early registration of ANC, anemia in the current pregnancy, good knowledge of IFAS, number of ANC visits, good knowledge of anemia and receiving health education about the benefit of IFAS were factors associated with the adherence of IFAS among pregnant women in Ethiopia. This finding is important to design strategic policies and to prevent anemia and congenital anomaly resulted from inadequate intake of iron and folic acid.

Project description:It is not known whether folate metabolism is altered during pregnancy to support increased DNA and RNA biosynthesis. By using a state-of-the-art LC tandem mass spectrometry technique, the aim of this study was to investigate differences in RBC folate forms between pregnant and nonpregnant women and between nonpregnant women consuming different concentrations of supplemental folic acid. Forms of folate in RBCs were used to explore potential shifts in folate metabolism during early erythropoiesis. Total RBC folate and folate forms [tetrahydrofolate; 5-methyltetrahydrofolate (5-methyl-THF); 4α-hydroxy-5-methyl-tetrahydrofolate (an oxidation product of 5-methyl-THF); 5-formyl-tetrahydrofolate; and 5,10-methenyl-tetrahydrofolate] were measured in 4 groups of women (n = 26): pregnant women (PW) (30-36 wk of gestation) consuming 1 mg/d of folic acid, and nonpregnant women consuming 0 mg/d (NPW-0), 1 mg/d (NPW-1), and 5 mg/d (NPW-5) folic acid. The mean ± SD RBC folate concentration of the NPW-0 group (890 ± 530 nmol/L) was lower than the NPW-1 (1660 ± 350 nmol/L) and NPW-5 (1980 ± 570 nmol/L) groups as assessed by microbiologic assay (n = 26, P < 0.0022). No difference was found between the NPW-1 and NPW-5 groups. We detected 5-methyl-THF [limit of detection (LOD) = 0.06 nmol/L] in all groups and tetrahydrofolate (LOD = 0.2 nmol/L) in most women regardless of methylenetetrahydrofolate reductase genotype. Most women consuming folic acid supplements had detectable concentrations of 5,10-methenyl-tetrahydrofolate (LOD = 0.31 nmol/L). However, there was no difference in the relative distribution of 5-methyl-THF (83-84%), sum of non-methyl folates (0.6-3%), or individual non-methyl folate forms in RBCs across groups. We conclude that although folic acid supplementation in nonpregnant women increases RBC total folate and the concentration of individual folate forms, it does not alter the relative distribution of folate forms. Similarly, distribution of RBC folate forms did not differ between pregnant and nonpregnant women. This trial was registered at clinicaltrials.gov as NCT01741077.

Project description:Introduction:Pregnant women are at a high risk of anaemia, with iron-folate deficiency being the most common cause of anaemia among pregnant women. Despite the well-known importance of iron and folic acid supplementation (IFAS) during pregnancy, adherence to these supplements is relatively low and associated factors were not well identified in the study area. This study is aimed at investigating adherence to IFAS and associated factors among pregnant women in Kasulu district, north-western Tanzania. Methods:A health facility cross-sectional survey with a mixed-method approach was conducted in Kasulu district from March to April 2019. A structured questionnaire was given to 320 women with children aged 0-6 months to assess factors associated with adherence to IFAS among pregnant women. Data were entered into SPSS version 22.0 for analysis. Binary logistic regression was further employed to determine the factors associated with adherence to IFAS. Focus group discussions were done with 19 pregnant women and 15 mothers of children aged 0-6 months to obtain more clarifications on the factors associated with adherence to IFAS. Furthermore, in-depth interviews were done with six health care providers to explore their perceptions of IFAS. Results:Out of the 320 respondents of the survey, 20.3% (n = 65) adhered to IFAS. Factors associated with adherence to IFAS among pregnant women included time to start ANC (AOR = 3.72, 95% CI: 1.42, 9.79), knowledge of anaemia (AOR = 3.84, 95% CI: 1.335, 10.66), counseling on the importance of the iron-folic acid (AOR = 3.86, 95% CI: 1.42, 10.50), IFAS given during clinical visit (AOR = 15.72, 95% CI: 5.34, 46.31), number of meals consumed (AOR = 3.44, 95% CI: 1.28, 9.21), number of children (AOR = 3.462, 95% CI: 1.035, 11.58), and distance to health facility (AOR = 0.34, 95% CI: 0.131, 0.886). Qualitative findings revealed that delayed first ANC visit, lack of remainder for pregnant women to take IFAS, low awareness about the negative effects of anaemia, low of knowledge of IFAS and management of side effects, negative beliefs about the use of IFAS, and follow-up mechanism were major reasons for poor adherence. Conclusion:Adherence to iron-folic acid supplementation during pregnancy was low. Strengthening systems for creating reminding mechanism, raising community awareness through educational programs to pregnant women and health providers could improve adherence to IFAS.

Project description:BackgroundGlobally, anemia is a public health problem affecting the life of more than two billion people. Pregnant women are at high risk of iron deficiency anemia due to increased nutrient requirement during pregnancy. Iron-folic acid supplementation is the main strategy for prevention and control of iron deficiency anemia and its effectiveness depends on adherence to Iron-Folic Acid tablets. In the refugee camps of Ethiopia, despite the efforts made to reduce iron deficiency anemia during pregnancy, information about adherence to iron-folic acid supplementation and its associated factors are lacking. The objective of this study was to assess magnitude and factors associated with adherence to iron-folic acid supplementation, among pregnant women, in Shire refugee camps.MethodsInstitution based cross-sectional study with mixed design (quantitative and qualitative) was carried out among pregnant women in Shire refugee camps from September to November 2015. For quantitative data, a sample of 320 pregnant women was systematically selected and data were collected via interview administered structured questionnaire. Quantitative data were coded and entered into Epi-info version 3.5.1 and exported into a statistical package for social sciences (SPSS) Version 19.0 software for analysis. Bivariable and multivariable logistic regressions were employed to identify the predictors at p-value <?0.2 and 0.05 respectively. For the qualitative part, six focus group discussions and three key informant interviews were conducted on purposely-selected individuals. Open-Code version 3.6.2.0 was used for analysis. Identified themes were arranged into coherent groupings and triangulated with quantitative findings.ResultsThe adherence rate was found to be 64.7% [95% CI (59.7%, 70.0%)]. Women who were having lower knowledge about anemia [AOR; 0.23 95% CI (0.14, 0.38)] and not receiving information about importance of iron-folic acid supplementation [AOR; 0.43 95% CI (0.25, 0.74)] were negatively associated with adherence to iron and folic acid., Having four or more antenatal care visits [AOR; 2.83 95% CI (1.46, 5.48)] were positively significantly associated with adherence to iron-folic acid supplementation.ConclusionsAdherence rate of iron-folic acid supplementation during pregnancy in the study area is relatively low. Proper counseling and health promotion about Iron-Folic Acid tablet intake, promoting the benefits of early and frequent ANC visit, health promotion on anemia prevention and health benefits of the importance of iron-folic acid supplements are recommended to increase adherence with iron-folic acid supplementation.

Dataset Information

Folate of pregnant women after a nationwide folic acid supplementation in China.

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Folate of pregnant women after a nationwide folic acid supplementation in China.

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