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Epidemiology of congenital heart disease in Merseyside—1979 to 1988

Published online by Cambridge University Press:  19 August 2008

Mark Jackson ,
Kevin P. Walsh ,
Ian Peart  and
Robert Arnold
Mark Jackson
Affiliation:
Royal Liverpool Children‘s Hospital, Alder Hey, Liverpool
Kevin P. Walsh
Affiliation:
Institute of Child Health, University of Liverpool and the Cardiac Unit, Alder Hey, Liverpool
Ian Peart
Affiliation:
Institute of Child Health, University of Liverpool and the Cardiac Unit, Alder Hey, Liverpool
Robert Arnold*
Affiliation:
Institute of Child Health, University of Liverpool and the Cardiac Unit, Alder Hey, Liverpool
*
Dr. Mark Jackson, The Cardiothoracic Centre Liverpool NHS Trust, Thomas Drive, Liverpool, L14 3PE, United Kingdom. Tel. 0151 254 7937; Fax.0151 2547935.
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Abstract

All infants and children born alive with documented congenital heart disease (excluding those weighing less than 2500 g at birth with a diagnosis of patent arterial duct) within the county of Merseyside between 1979 and 1988 were identified from the combined records of the Liverpool Congenital Malformations Registry and the Cardiac Unit, Royal Liverpool Children‘s Hospital Alder Hey, Liverpool. In total, 1543 cases were disclosed from a live-birth population of 203,880 providing a prevalence rate at birth of 7.57 (95% confidence interval: 7.20–7.96) cases per 1000 livebirths. The overall crude death rate was 18.5% (95% confidence interval: 16.4–20.3). An additional 240 (15.6% [95% confidence interval: 13.8–17.5%]) cases of heart disease not identified by the registry were disclosed from the records of the cardiac unit, demonstrating the unreliability of rates published by monitoring bodies. The annual prevalence rate at birth varied from 6.3 to 9.0 per 1000 livebirths, and seemed to be associated with the impact of new imaging technology. Regional variation was marked (5.3 to 8.9 per 1000 livebirths) and unaccountable in terms of potential morphogenetic mechanism, suggesting inconsistencies in referral of cases. Exclusion of regions of poor ascertainment in the calculation of a revised figure for the prevalence rate at birth suggests that as many as 89 in every 10,000 infants born alive may have structural cardiac anomalies. In conclusion, annual and regional variation of ascertainment in registry studies remains the enemy of an accurate description of the true prevalence rate at birth for congenital heart disease.

Keywords

Epidemiologybirth prevalenceregionalannualvariation
Type
Original Manuscripts
Information
Cardiology in the Young , Volume 6 , Issue 4 , October 1996 , pp. 272 - 280
Copyright
Copyright © Cambridge University Press 1996

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