Yan Ping Qi, Krista S. Crider, Anne M. Williams, Katie Tripp, Carine Mapango, Elizabeth C. Rhodes, Eunice Nyirenda, Felix Phiri, Mindy Zhang, Shameem Jabbar, Christine M. Pfeiffer, Helena Pachón, Sarah Zimmerman, Jennifer L. Williams
{"title":"2015-2016年马拉维全国微量营养素调查中非怀孕育龄妇女的叶酸和维生素B12状况与预测的神经管缺陷风险。","authors":"Yan Ping Qi, Krista S. Crider, Anne M. Williams, Katie Tripp, Carine Mapango, Elizabeth C. Rhodes, Eunice Nyirenda, Felix Phiri, Mindy Zhang, Shameem Jabbar, Christine M. Pfeiffer, Helena Pachón, Sarah Zimmerman, Jennifer L. Williams","doi":"10.1002/bdr2.2329","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background</h3>\n \n <p>Maternal folate and vitamin B<sub>12</sub> deficiency can lead to serious adverse pregnancy outcomes. There are no nationally representative estimates on folate and vitamin B<sub>12</sub> status among women of reproductive age (WRA) in Malawi.</p>\n </section>\n \n <section>\n \n <h3> Objective</h3>\n \n <p>We assessed folate and vitamin B<sub>12</sub> status among nonpregnant WRA in Malawi and predicted the risk of folate-sensitive neural tube defects (NTDs) were they to become pregnant.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>Using data from the cross-sectional, nationally representative 2015–2016 Malawi Micronutrient Survey, we calculated the proportion of folate and vitamin B<sub>12</sub> deficiency and insufficiency by demographic characteristics among 778 nonpregnant WRA (15–49 years). We predicted NTD prevalence using red blood cell (RBC) folate distributions and a published Bayesian model of the association between RBC folate and NTD risk. Analyses accounted for complex survey design.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Among WRA, 8.5% (95% CI: 6.2, 11.6) and 13.3% (10.0, 17.4) had serum (<7 nmol/L) and RBC folate (<305 nmol/L) deficiency, respectively. The proportion of vitamin B<sub>12</sub> deficiency (<148 pmol/L) and insufficiency (≤221 pmol/L) was 11.8% (8.6, 16.0) and 40.6% (34.1, 47.4), respectively. RBC folate insufficiency (<748 nmol/L, defined as the concentration associated with the threshold for elevated NTD risk: >8 cases per 10,000 births) was widespread: 81.4% (75.0, 86.4). The predicted NTD risk nationally was 24.7 cases per 10,000 live births. RBC folate insufficiency and higher predicted NTD risk were more common among WRA living in urban areas or with higher education.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>These findings highlight the importance of nutritional and NTD surveillance in Malawi and the opportunity for improving folate and vitamin B<sub>12</sub> nutrition among Malawian WRA.</p>\n </section>\n </div>","PeriodicalId":9121,"journal":{"name":"Birth Defects Research","volume":"116 3","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Folate and vitamin B12 status and predicted neural tube defects risk among nonpregnant women of reproductive age from the Malawi National Micronutrient Survey, 2015–2016\",\"authors\":\"Yan Ping Qi, Krista S. Crider, Anne M. Williams, Katie Tripp, Carine Mapango, Elizabeth C. Rhodes, Eunice Nyirenda, Felix Phiri, Mindy Zhang, Shameem Jabbar, Christine M. Pfeiffer, Helena Pachón, Sarah Zimmerman, Jennifer L. Williams\",\"doi\":\"10.1002/bdr2.2329\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Background</h3>\\n \\n <p>Maternal folate and vitamin B<sub>12</sub> deficiency can lead to serious adverse pregnancy outcomes. There are no nationally representative estimates on folate and vitamin B<sub>12</sub> status among women of reproductive age (WRA) in Malawi.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Objective</h3>\\n \\n <p>We assessed folate and vitamin B<sub>12</sub> status among nonpregnant WRA in Malawi and predicted the risk of folate-sensitive neural tube defects (NTDs) were they to become pregnant.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Using data from the cross-sectional, nationally representative 2015–2016 Malawi Micronutrient Survey, we calculated the proportion of folate and vitamin B<sub>12</sub> deficiency and insufficiency by demographic characteristics among 778 nonpregnant WRA (15–49 years). We predicted NTD prevalence using red blood cell (RBC) folate distributions and a published Bayesian model of the association between RBC folate and NTD risk. Analyses accounted for complex survey design.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>Among WRA, 8.5% (95% CI: 6.2, 11.6) and 13.3% (10.0, 17.4) had serum (<7 nmol/L) and RBC folate (<305 nmol/L) deficiency, respectively. The proportion of vitamin B<sub>12</sub> deficiency (<148 pmol/L) and insufficiency (≤221 pmol/L) was 11.8% (8.6, 16.0) and 40.6% (34.1, 47.4), respectively. RBC folate insufficiency (<748 nmol/L, defined as the concentration associated with the threshold for elevated NTD risk: >8 cases per 10,000 births) was widespread: 81.4% (75.0, 86.4). The predicted NTD risk nationally was 24.7 cases per 10,000 live births. RBC folate insufficiency and higher predicted NTD risk were more common among WRA living in urban areas or with higher education.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusions</h3>\\n \\n <p>These findings highlight the importance of nutritional and NTD surveillance in Malawi and the opportunity for improving folate and vitamin B<sub>12</sub> nutrition among Malawian WRA.</p>\\n </section>\\n </div>\",\"PeriodicalId\":9121,\"journal\":{\"name\":\"Birth Defects Research\",\"volume\":\"116 3\",\"pages\":\"\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2024-03-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Birth Defects Research\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/bdr2.2329\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"DEVELOPMENTAL BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Birth Defects Research","FirstCategoryId":"3","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/bdr2.2329","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"DEVELOPMENTAL BIOLOGY","Score":null,"Total":0}
Folate and vitamin B12 status and predicted neural tube defects risk among nonpregnant women of reproductive age from the Malawi National Micronutrient Survey, 2015–2016
Background
Maternal folate and vitamin B12 deficiency can lead to serious adverse pregnancy outcomes. There are no nationally representative estimates on folate and vitamin B12 status among women of reproductive age (WRA) in Malawi.
Objective
We assessed folate and vitamin B12 status among nonpregnant WRA in Malawi and predicted the risk of folate-sensitive neural tube defects (NTDs) were they to become pregnant.
Methods
Using data from the cross-sectional, nationally representative 2015–2016 Malawi Micronutrient Survey, we calculated the proportion of folate and vitamin B12 deficiency and insufficiency by demographic characteristics among 778 nonpregnant WRA (15–49 years). We predicted NTD prevalence using red blood cell (RBC) folate distributions and a published Bayesian model of the association between RBC folate and NTD risk. Analyses accounted for complex survey design.
Results
Among WRA, 8.5% (95% CI: 6.2, 11.6) and 13.3% (10.0, 17.4) had serum (<7 nmol/L) and RBC folate (<305 nmol/L) deficiency, respectively. The proportion of vitamin B12 deficiency (<148 pmol/L) and insufficiency (≤221 pmol/L) was 11.8% (8.6, 16.0) and 40.6% (34.1, 47.4), respectively. RBC folate insufficiency (<748 nmol/L, defined as the concentration associated with the threshold for elevated NTD risk: >8 cases per 10,000 births) was widespread: 81.4% (75.0, 86.4). The predicted NTD risk nationally was 24.7 cases per 10,000 live births. RBC folate insufficiency and higher predicted NTD risk were more common among WRA living in urban areas or with higher education.
Conclusions
These findings highlight the importance of nutritional and NTD surveillance in Malawi and the opportunity for improving folate and vitamin B12 nutrition among Malawian WRA.
期刊介绍:
The journal Birth Defects Research publishes original research and reviews in areas related to the etiology of adverse developmental and reproductive outcome. In particular the journal is devoted to the publication of original scientific research that contributes to the understanding of the biology of embryonic development and the prenatal causative factors and mechanisms leading to adverse pregnancy outcomes, namely structural and functional birth defects, pregnancy loss, postnatal functional defects in the human population, and to the identification of prenatal factors and biological mechanisms that reduce these risks.
Adverse reproductive and developmental outcomes may have genetic, environmental, nutritional or epigenetic causes. Accordingly, the journal Birth Defects Research takes an integrated, multidisciplinary approach in its organization and publication strategy. The journal Birth Defects Research contains separate sections for clinical and molecular teratology, developmental and reproductive toxicology, and reviews in developmental biology to acknowledge and accommodate the integrative nature of research in this field. Each section has a dedicated editor who is a leader in his/her field and who has full editorial authority in his/her area.