Browsing by Author "Limb, Elizabeth"
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- Prevalence of vascular disruption anomalies and association with young maternal age: A EUROCAT study to compare the United Kingdom with other European countriesPublication . Morris, Joan K.; Wellesley, Diana; Limb, Elizabeth; Bergman, Jorieke E.H.; Kinsner‐Ovaskainen, Agnieszka; Addor, Marie Claude; Broughan, Jennifer M.; Cavero‐Carbonell, Clara; Matias Dias, Carlos; Echevarría‐González‐de‐Garibay, Luis‐Javier; Gatt, Miriam; Haeusler, Martin; Barisic, Ingeborg; Klungsoyr, Kari; Lelong, Nathalie; Materna‐Kiryluk, Anna; Neville, Amanda; Nelen, Vera; O'Mahony, Mary T.; Perthus, Isabelle; Pierini, Anna; Rankin, Judith; Rissmann, Anke; Rouget, Florence; Sayers, Geraldine; Stevens, Sarah; Tucker, David; Garne, EsterBackground: Younger mothers are at a greater risk of having a pregnancy with gastroschisis and the risk is higher in the United Kingdom than other European countries. Gastroschisis is thought to be a vascular disruption anomaly and the aim of this study was to analyze the prevalence of other possible vascular disruption anomalies to determine whether both the younger maternal age and the UK associations also occur with these anomalies. Methods: All pregnancies with anomalies considered potentially due to vascular disruption from January 1, 2005 to December 31, 2017 from 26 European population-based congenital anomaly registries who were members of EUROCAT were analyzed. Multilevel models were used to allow for differences between registries when analyzing associations with maternal age, year of birth and whether the registry was in the United Kingdom. Results: There were 5,220 cases with potential vascular disruption anomalies, excluding chromosomal and genetic conditions, with a prevalence of 8.85 per 10,000 births in the United Kingdom and 5.44 in the other European countries. The prevalence per 10,000 births of gastroschisis (4.45 vs. 1.56) and congenital constriction bands (0.83 vs. 0.42) was significantly higher in the United Kingdom, even after adjusting for maternal age. However, transverse limb reduction defects had a similar prevalence (2.16 vs. 2.14 per 10,000). The expected increased prevalence in younger mothers was observed for vascular disruption anomalies overall and for the individual anomalies: gastroschisis and congenital constriction bands. Conclusion: Vascular disruption anomalies that had an increased risk for younger mothers (such as gastroschisis) had a higher maternal age standardized prevalence in the United Kingdom, while vascular disruption anomalies with weaker associations with younger mothers (such as transverse limb reduction defects) did not have an increased prevalence in the United Kingdom, which may indicate a different etiology for these anomalies.
- Prevention of Neural Tube Defects in Europe: A Public Health FailurePublication . Morris, Joan K.; Addor, Marie-Claude; Ballardini, Elisa; Barisic, Ingeborg; Barrachina-Bonet, Laia; Braz, Paula; Cavero-Carbonell, Clara; Den Hond, Elly; Garne, Ester; Gatt, Miriam; Haeusler, Martin; Khoshnood, Babak; Lelong, Nathalie; Kinsner-Ovaskainen, Agnieszka; Kiuru-Kuhlefelt, Sonja; Klungsoyr, Kari; Latos-Bielenska, Anna; Limb, Elizabeth; O'Mahony, Mary T.; Perthus, Isabelle; Pierini, Anna; Rankin, Judith; Rissmann, Anke; Rouget, Florence; Sayers, Gerardine; Sipek, Antonin; Stevens, Sarah; Tucker, David; Verellen-Dumoulin, Christine; de Walle, Hermien E.K.; Wellesley, Diana; Wertelecki, Wladimir; Bermejo-Sanchez, EvaObjective: Thirty years ago it was demonstrated that folic acid taken before pregnancy and in early pregnancy reduced the risk of a neural tube defect (NTD). Despite Public Health Initiatives across Europe recommending that women take 0.4 mg folic acid before becoming pregnant and during the first trimester, the prevalence of NTD pregnancies has not materially decreased in the EU since 1998, in contrast to the dramatic fall observed in the USA. This study aimed to estimate the number of NTD pregnancies that would have been prevented if flour had been fortified with folic acid in Europe from 1998 as it had been in the USA. Design and Setting: The number of NTD pregnancies from 1998 to 2017 that would have been prevented if folic acid fortification had been implemented in the 28 countries who were members of the European Union in 2019 was predicted was predicted using data on NTD prevalence from 35 EUROCAT congenital anomaly registries and literature searches for population serum folate levels and folic acid supplementation. Results: From 1998 to 2017 an estimated 95,213 NTD pregnancies occurred amongst 104 million births in the 28 countries in the EU, a prevalence of 0.92 per 1,000 births. The median serum folate level in Europe over this time period was estimated to be 14.1 μg/L. There is a lack of information about women taking folic acid supplements before becoming pregnant and during the first trimester of pregnancy, with one meta-analysis indicating that around 25% of women did so. An estimated 14,600 NTD pregnancies may have been prevented if the European countries had implemented fortification at the level adopted by the USA in 1998 and 25% of women took folic acid supplements. An estimated 19,500 NTD pregnancies would have been prevented if no women took folic acid supplements. Conclusions: This study suggests that failure to implement mandatory folic acid fortification in the 28 European countries has caused, and continues to cause, neural tube defects to occur in almost 1,000 pregnancies every year.
- Surveillance of multiple congenital anomalies; searching for new associationsPublication . Morris, Joan K.; Bergman, Jorieke E.H.; Barisic, Ingeborg; Wellesley, Diana; Tucker, David; Limb, Elizabeth; Addor, Marie-Claude; Cavero-Carbonell, Clara; Matias Dias, Carlos; Draper, Elisabeth S.; Echevarría-González-de-Garibay, Luis Javier; Gatt, Miriam; Klungsøyr, Kari; Lelong, Nathalie; Luyt, Karen; Materna-Kiryluk, Anna; Nelen, Vera; Neville, Amanda; Perthus, Isabelle; Pierini, Anna; Randrianaivo-Ranjatoelina, Hanitra; Rankin, Judith; Rissmann, Anke; Rouget, Florence; Sayers, Geraldine; Wertelecki, Wladimir; Kinsner-Ovaskainen, Agnieszka; Garne, EsterMany human teratogens are associated with a spectrum of congenital anomalies rather than a single defect, and therefore the identification of congenital anomalies occurring together more frequently than expected may improve the detection of teratogens. Thirty-two EUROCAT congenital anomaly registries covering 6,599,765 births provided 123,566 cases with one or more major congenital anomalies (excluding chromosomal and genetic syndromes) for the birth years 2008–2016. The EUROCAT multiple congenital anomaly algorithm identified 8804 cases with two or more major congenital anomalies in different organ systems, that were not recognized as part of a syndrome or sequence. For each pair of anomalies, the odds of a case having both anomalies relative to having only one anomaly was calculated and the p value was estimated using a two-sided Fisher’s exact test. The Benjamini–Hochberg procedure adjusted p values to control the false discovery rate and pairs of anomalies with adjusted p values < 0.05 were identified. A total of 1386 combinations of two anomalies were analyzed. Out of the 31 statistically significant positive associations identified, 20 were found to be known associations or sequences already described in the literature and 11 were considered “potential new associations” by the EUROCAT Coding and Classification Committee. After a review of the literature and a detailed examination of the individual cases with the anomaly pairs, six pairs remained classified as new associations. In summary, systematically searching for congenital anomalies occurring together more frequently than expected using the EUROCAT database is worthwhile and has identified six new associations that merit further investigation.