title: Hirschsprung's disease prevalence in Europe: a register based study.
abstract: BACKGROUND
  Hirschsprung's disease is a congenital gut motility disorder, characterised by the absence of the enteric ganglion cells along the distal gut. The aim of this study was to describe the epidemiology of Hirschsprung's disease, including additional congenital anomalies, total prevalence, trends, and association with maternal age.
  
  
  METHODS
  Cases of Hirschsprung's disease delivered during 1980 to 2009 notified to 31 European Surveillance of Congenital Anomaly registers formed the population-based case-series. Prevalence rates and 95% confidence intervals were calculated as the number of cases per 10,000 births. Multilevel Poisson regression was performed to investigate trends in prevalence, geographical variation and the association with maternal age.
  
  
  RESULTS
  There were 1,322 cases of Hirschsprung's disease among 12,146,210 births. The total prevalence was 1.09 (95% confidence interval, 1.03-1.15) per 10,000 births and there was a small but significant increase in prevalence over time (relative risk = 1.01; 95% credible interval, 1.00-1.02; p = 0.004). There was evidence of geographical heterogeneity in prevalence (p < 0.001). Excluding 146 (11.0%) cases with chromosomal anomalies or genetic syndromes, there were 1,176 cases (prevalence = 0.97; 95% confidence interval, 0.91-1.03 per 10,000 births), of which 137 (11.6%) had major structural anomalies. There was no evidence of a significant increased risk of Hirschsprung's disease in cases born to women aged ≥35 years compared with those aged 25 to 29 (relative risk = 1.09; 95% credible interval, 0.91-1.31; p = 0.355).
  
  
  CONCLUSIONS
  This large population-based study found evidence of a small increasing trend in Hirschsprung's disease and differences in prevalence by geographic location. There was also no evidence of an association with maternal age.
authors: Institute of Health & Society, Newcastle University, Newcastle upon Tyne, England, United Kingdom.
authors: Kate E
authors: KE
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authors: Marie-Claude
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authors: Materna-Kiryluk
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authors: McDonnell
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authors: Queisser-Luft
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authors: Randrianaivo
authors: Anke
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authors: Rissmann
authors: Catherine
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authors: Rounding
authors: Antonin
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authors: Sipek
authors: Rosie
authors: R
authors: Thompson
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authors: Wellesley
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mesh_terms: D000328:Adult; D016022:Case-Control Studies; D002869:Chromosome Aberrations; D005060:Europe / Q000453:epidemiology; D005260:Female; D006627:Hirschsprung Disease / Q000453:epidemiology* / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D015995:Prevalence; D012042:Registries; D016019:Survival Analysis
keywords: Hirschsprung's disease; congenital aganglionic megacolon; gut motility disorder; prevalence; trends