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Long term trends in prevalence of neural tube defects in Europe: population based study

Study question What are the long term trends in the total (live births, fetal deaths, and terminations of pregnancy for fetal anomaly) and live birth prevalence of neural tube defects (NTD) in Europe, where many countries have issued recommendations for folic acid supplementation but a policy for ma...

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Autores principales: Khoshnood, Babak, Loane, Maria, de Walle, Hermien, Arriola, Larraitz, Addor, Marie-Claude, Barisic, Ingeborg, Beres, Judit, Bianchi, Fabrizio, Dias, Carlos, Draper, Elizabeth, Garne, Ester, Gatt, Miriam, Haeusler, Martin, Klungsoyr, Kari, Latos-Bielenska, Anna, Lynch, Catherine, McDonnell, Bob, Nelen, Vera, Neville, Amanda J, O’Mahony, Mary T, Queisser-Luft, Annette, Rankin, Judith, Rissmann, Anke, Ritvanen, Annukka, Rounding, Catherine, Sipek, Antonin, Tucker, David, Verellen-Dumoulin, Christine, Wellesley, Diana, Dolk, Helen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BMJ Publishing Group Ltd. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4658393/
https://www.ncbi.nlm.nih.gov/pubmed/26601850
http://dx.doi.org/10.1136/bmj.h5949
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author Khoshnood, Babak
Loane, Maria
de Walle, Hermien
Arriola, Larraitz
Addor, Marie-Claude
Barisic, Ingeborg
Beres, Judit
Bianchi, Fabrizio
Dias, Carlos
Draper, Elizabeth
Garne, Ester
Gatt, Miriam
Haeusler, Martin
Klungsoyr, Kari
Latos-Bielenska, Anna
Lynch, Catherine
McDonnell, Bob
Nelen, Vera
Neville, Amanda J
O’Mahony, Mary T
Queisser-Luft, Annette
Rankin, Judith
Rissmann, Anke
Ritvanen, Annukka
Rounding, Catherine
Sipek, Antonin
Tucker, David
Verellen-Dumoulin, Christine
Wellesley, Diana
Dolk, Helen
author_facet Khoshnood, Babak
Loane, Maria
de Walle, Hermien
Arriola, Larraitz
Addor, Marie-Claude
Barisic, Ingeborg
Beres, Judit
Bianchi, Fabrizio
Dias, Carlos
Draper, Elizabeth
Garne, Ester
Gatt, Miriam
Haeusler, Martin
Klungsoyr, Kari
Latos-Bielenska, Anna
Lynch, Catherine
McDonnell, Bob
Nelen, Vera
Neville, Amanda J
O’Mahony, Mary T
Queisser-Luft, Annette
Rankin, Judith
Rissmann, Anke
Ritvanen, Annukka
Rounding, Catherine
Sipek, Antonin
Tucker, David
Verellen-Dumoulin, Christine
Wellesley, Diana
Dolk, Helen
author_sort Khoshnood, Babak
collection PubMed
description Study question What are the long term trends in the total (live births, fetal deaths, and terminations of pregnancy for fetal anomaly) and live birth prevalence of neural tube defects (NTD) in Europe, where many countries have issued recommendations for folic acid supplementation but a policy for mandatory folic acid fortification of food does not exist? Methods This was a population based, observational study using data on 11 353 cases of NTD not associated with chromosomal anomalies, including 4162 cases of anencephaly and 5776 cases of spina bifida from 28 EUROCAT (European Surveillance of Congenital Anomalies) registries covering approximately 12.5 million births in 19 countries between 1991 and 2011. The main outcome measures were total and live birth prevalence of NTD, as well as anencephaly and spina bifida, with time trends analysed using random effects Poisson regression models to account for heterogeneities across registries and splines to model non-linear time trends. Summary answer and limitations Overall, the pooled total prevalence of NTD during the study period was 9.1 per 10 000 births. Prevalence of NTD fluctuated slightly but without an obvious downward trend, with the final estimate of the pooled total prevalence of NTD in 2011 similar to that in 1991. Estimates from Poisson models that took registry heterogeneities into account showed an annual increase of 4% (prevalence ratio 1.04, 95% confidence interval 1.01 to 1.07) in 1995-99 and a decrease of 3% per year in 1999-2003 (0.97, 0.95 to 0.99), with stable rates thereafter. The trend patterns for anencephaly and spina bifida were similar, but neither anomaly decreased substantially over time. The live birth prevalence of NTD generally decreased, especially for anencephaly. Registration problems or other data artefacts cannot be excluded as a partial explanation of the observed trends (or lack thereof) in the prevalence of NTD. What this study adds In the absence of mandatory fortification, the prevalence of NTD has not decreased in Europe despite longstanding recommendations aimed at promoting peri-conceptional folic acid supplementation and existence of voluntary folic acid fortification. Funding, competing interests, data sharing The study was funded by the European Public Health Commission, EUROCAT Joint Action 2011-2013. HD and ML received support from the European Commission DG Sanco during the conduct of this study. No additional data available.
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spelling pubmed-46583932015-12-01 Long term trends in prevalence of neural tube defects in Europe: population based study Khoshnood, Babak Loane, Maria de Walle, Hermien Arriola, Larraitz Addor, Marie-Claude Barisic, Ingeborg Beres, Judit Bianchi, Fabrizio Dias, Carlos Draper, Elizabeth Garne, Ester Gatt, Miriam Haeusler, Martin Klungsoyr, Kari Latos-Bielenska, Anna Lynch, Catherine McDonnell, Bob Nelen, Vera Neville, Amanda J O’Mahony, Mary T Queisser-Luft, Annette Rankin, Judith Rissmann, Anke Ritvanen, Annukka Rounding, Catherine Sipek, Antonin Tucker, David Verellen-Dumoulin, Christine Wellesley, Diana Dolk, Helen BMJ Research Study question What are the long term trends in the total (live births, fetal deaths, and terminations of pregnancy for fetal anomaly) and live birth prevalence of neural tube defects (NTD) in Europe, where many countries have issued recommendations for folic acid supplementation but a policy for mandatory folic acid fortification of food does not exist? Methods This was a population based, observational study using data on 11 353 cases of NTD not associated with chromosomal anomalies, including 4162 cases of anencephaly and 5776 cases of spina bifida from 28 EUROCAT (European Surveillance of Congenital Anomalies) registries covering approximately 12.5 million births in 19 countries between 1991 and 2011. The main outcome measures were total and live birth prevalence of NTD, as well as anencephaly and spina bifida, with time trends analysed using random effects Poisson regression models to account for heterogeneities across registries and splines to model non-linear time trends. Summary answer and limitations Overall, the pooled total prevalence of NTD during the study period was 9.1 per 10 000 births. Prevalence of NTD fluctuated slightly but without an obvious downward trend, with the final estimate of the pooled total prevalence of NTD in 2011 similar to that in 1991. Estimates from Poisson models that took registry heterogeneities into account showed an annual increase of 4% (prevalence ratio 1.04, 95% confidence interval 1.01 to 1.07) in 1995-99 and a decrease of 3% per year in 1999-2003 (0.97, 0.95 to 0.99), with stable rates thereafter. The trend patterns for anencephaly and spina bifida were similar, but neither anomaly decreased substantially over time. The live birth prevalence of NTD generally decreased, especially for anencephaly. Registration problems or other data artefacts cannot be excluded as a partial explanation of the observed trends (or lack thereof) in the prevalence of NTD. What this study adds In the absence of mandatory fortification, the prevalence of NTD has not decreased in Europe despite longstanding recommendations aimed at promoting peri-conceptional folic acid supplementation and existence of voluntary folic acid fortification. Funding, competing interests, data sharing The study was funded by the European Public Health Commission, EUROCAT Joint Action 2011-2013. HD and ML received support from the European Commission DG Sanco during the conduct of this study. No additional data available. BMJ Publishing Group Ltd. 2015-11-24 /pmc/articles/PMC4658393/ /pubmed/26601850 http://dx.doi.org/10.1136/bmj.h5949 Text en © Khoshnood et al 2015 http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.
spellingShingle Research
Khoshnood, Babak
Loane, Maria
de Walle, Hermien
Arriola, Larraitz
Addor, Marie-Claude
Barisic, Ingeborg
Beres, Judit
Bianchi, Fabrizio
Dias, Carlos
Draper, Elizabeth
Garne, Ester
Gatt, Miriam
Haeusler, Martin
Klungsoyr, Kari
Latos-Bielenska, Anna
Lynch, Catherine
McDonnell, Bob
Nelen, Vera
Neville, Amanda J
O’Mahony, Mary T
Queisser-Luft, Annette
Rankin, Judith
Rissmann, Anke
Ritvanen, Annukka
Rounding, Catherine
Sipek, Antonin
Tucker, David
Verellen-Dumoulin, Christine
Wellesley, Diana
Dolk, Helen
Long term trends in prevalence of neural tube defects in Europe: population based study
title Long term trends in prevalence of neural tube defects in Europe: population based study
title_full Long term trends in prevalence of neural tube defects in Europe: population based study
title_fullStr Long term trends in prevalence of neural tube defects in Europe: population based study
title_full_unstemmed Long term trends in prevalence of neural tube defects in Europe: population based study
title_short Long term trends in prevalence of neural tube defects in Europe: population based study
title_sort long term trends in prevalence of neural tube defects in europe: population based study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4658393/
https://www.ncbi.nlm.nih.gov/pubmed/26601850
http://dx.doi.org/10.1136/bmj.h5949
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