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BACKGROUND: Congenital anomalies are a major cause of perinatal, neonatal and infant mortality.OBJECTIVES: The aim was to investigate temporal changes and geographical variation in survival of children with major congenital anomalies (CA) in different European areas.METHODS: In this population-based linkage cohort study, 17 CA registries members of EUROCAT, the European network for the surveillance of CAs, successfully linked data on 115,219 live births with CAs to mortality records. Registries estimated Kaplan-Meier survival at 28 days and 5 years of age and fitted Cox's proportional hazards models comparing mortality at 1 year and 1-9 years of age for children born during 2005-2014 with those born during 1995-2004. The hazard ratios (HR) from each registry were combined centrally using a random-effects model. The 5-year survival conditional on having survived to 28 days of age was calculated.RESULTS: The overall risk of death by 1 year of age for children born with any major CA in 2005-2014 decreased compared to 1995-2004 (HR 0.68, 95% confidence interval [CI] 0.53, 0.89). Survival at 5 years of age ranged between registries from 97.6% to 87.0%. The lowest survival was observed for the registry of OMNI-Net (Ukraine) (87.0%, 95% CI 86.1, 87.9).CONCLUSIONS: Survival of children with CAs improved for births in 2005-2014 compared with 1995-2004. The use of CA registry data linked to mortality data enables investigation of survival of children with CAs. Factors such as defining major CAs, proportion of terminations of pregnancy for foetal anomaly, source of mortality data and linkage methods are important to consider in the design of future studies and in the interpretation of the results on survival of children with CAs.

BackgroundCongenital anomalies are the leading cause of perinatal, neonatal and infant mortality in developed countries. Large long-term follow-up studies investigating survival beyond the first year of life in children with rare congenital anomalies are costly and sufficiently large standardized cohorts are difficult to obtain due to the rarity of some anomalies. This study aimed to investigate the survival up to 10 years of age of children born with a rare structural congenital anomaly in the period 1995–2014 in Western Europe.MethodsLive births from thirteen EUROCAT (European network for the epidemiological surveillance of congenital anomalies) population-based registries were linked to mortality records. Survival for 12,685 live births with one of the 31 investigated rare structural congenital anomalies (CAs) was estimated at 1 week, 4 weeks and 1, 5 and 10 years of age within each registry and combined across Europe using random effects meta-analyses. Differences between registries were evaluated for the eight rare CAs with at least 500 live births.ResultsAmongst the investigated CAs, arhinencephaly/holoprosencephaly had the lowest survival at all ages (58.1%, 95% Confidence Interval (CI): 44.3–76.2% at 1 week; 47.4%, CI: 36.4–61.6% at 1 year; 35.6%, CI: 22.2–56.9% at 10 years). Overall, children with rare CAs of the digestive system had the highest survival (> 95% at 1 week, > 84% at 10 years). Most deaths occurred within the first four weeks of life, resulting in a 10-year survival conditional on surviving 4 weeks of over 95% for 17 out of 31 rare CAs. A moderate variability in survival between participating registries was observed for the eight selected rare CAs.ConclusionsPooling standardised data across 13 European CA registries and the linkage to mortality data enabled reliable survival estimates to be obtained at five ages up to ten years. Such estimates are useful for clinical practice and parental counselling.

ObjectivesPreterm children are exposed to many medications in neonatal intensive care units, but little is known about the effect of prematurity on medication use throughout infancy and childhood. We examined prescriptions of cardiovascular medication (CVM), antiseizure medication (ASM), antiasthmatic medication and antibiotics issued/dispensed in the first 10 years of life for very and moderately preterm children compared with term.DesignPopulation-based data linkage cohort study linking information from birth records to prescription records.SettingSix registries from five countries in the EUROlinkCAT study.ParticipantsThe study population included 1 722 912 children, of whom 10 820 (0.6%) were very preterm (Main outcome measuresRelative risk (RR) of receiving a prescription for CVM, ASM, antiasthmatic and antibiotics.ResultsVery preterm children had a higher RR of receiving a prescription for CVM and ASM than preterm children. For all preterm children, the RR of having a CVM prescription was 3.58 (95% CI 2.06 to 6.23); 2.06 (95% CI 1.73 to 2.41) for ASM; 1.13 (95% CI 0.99 to 1.29) for antiasthmatics and 0.96 (95% CI 0.93 to 0.99) for antibiotics in the first year of life. Increased prescription of CVM, ASM and antiasthmatics persisted for all 10 years of follow-up. Although the RR was highest for CVM and ASM, in absolute numbers more children received prescriptions for antibiotics (42.34%, 95% CI 38.81% to 45.91%) and antiasthmatics (28.40%, 95% CI 16.07% to 42.649%) than for CVM (0.18%, 95% CI 0.12% to 0.25%) and ASM (0.16%, 95% CI 0.13% to 0.20%) in the first year of life.ConclusionPreterm children had a higher risk of being prescribed/dispensed CVM, ASM and antiasthmatics up to age 10. This study highlights a need for further research into morbidity beyond age 10.

EUROlinkCAT Consortium: Abigail Reid, Liz Limb, Gillian Briggs, Nicholas Connor, Stine Kjaer Urhoj, Mads Damkjær, Christina Neergaard Pedersen, Svetlana V Glinianaia, Gianni Astolfi, Annarita Armaroli, Elisa Ballardini, Aurora Puccini, Ljubica Boban, Michele Santoro, Alessio Coi, Silvia Baldacci, Lorena Mezzasalma, L Renée Lutke, Nicole H A Siemensma-Mühlenberg, David Tucker, Babak Khoshnood, Nathalie Bertille, Nathalie Lelong, Makan Rahshenas, Clara Cavero Carbonell, Óscar Zurriaga, Laia Barrachina Bonet, Laura García Villodre, Anna Jamry-Dziurla, Anna Heino, Sonja Kiuru-Kuhlefelt, Mika Gissler, Wladimir Wertelecki, Lyubov Yevtushok, Nataliia Zymak-Zakutnia, Diana Akhmedzhanova, Lyubov Ostapchuk, Oksana Tsizh, Serhii Lapchenko, Carlos Matias Dias, Ausenda Machado, Ana João Santos, Liliana Antunes, Paula Braz, Hanitra Randrianaivo-Ranjatoelina, Guy Thys, Vera Nelen, Elly Den Hond, Olatz Mokoroa Carollo, Daniel Thayer, Ieuan Scanlon, Sue Jordan, Kari Klungsøyr, Miriam Gatt EUROlinkCAT Consortium: Carlos Matias Dias, Ausenda Machado, Ana João Santos, Liliana Antunes, Paula Braz (INSA, Portugal) Paediatrics - Protocol Introduction: Congenital anomalies (CAs) are a major cause of infant mortality, childhood morbidity and long-term disability. Over 130 000 children born in Europe every year will have a CA. This paper describes the EUROlinkCAT study, which is investigating the health and educational outcomes of children with CAs for the first 10 years of their lives. Methods and analysis: EUROCAT is a European network of population-based registries for the epidemiological surveillance of CAs. EUROlinkCAT is using the EUROCAT infrastructure to support 22 EUROCAT registries in 14 countries to link their data on births with CAs to mortality, hospital discharge, prescription and educational databases. Once linked, each registry transforms their case data into a common data model (CDM) format and they are then supplied with common STATA syntax scripts to analyse their data. The resulting aggregate tables and analysis results are submitted to a central results repository (CRR) and meta-analyses are performed to summarise the results across all registries. The CRR currently contains data on 155 594 children with a CA followed up to age 10 from a population of 6 million births from 1995 to 2014. Ethics: The CA registries have the required ethics permissions for routine surveillance and transmission of anonymised data to the EUROCAT central database. Each registry is responsible for applying for and obtaining additional ethics and other permissions required for their participation in EUROlinkCAT. Dissemination: The CDM and associated documentation, including linkage and standardisation procedures, will be available post-EUROlinkCAT thus facilitating future local, national and European-level analyses to improve healthcare. Recommendations to improve the accuracy of routinely collected data will be made.Findings will provide evidence to inform parents, health professionals, public health authorities and national treatment guidelines to optimise diagnosis, prevention and treatment for these children with a view to reducing health inequalities in Europe. This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under grant agreement No 733001 for 5 years: 1 January 2017 to 31 December 2021. The views presented here are those of the authors only, and the European Commission is not responsible for any use that may be made of the information presented here. info:eu-repo/semantics/publishedVersion