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Bispebjerg Hospital - a part of Copenhagen University Hospital
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Co-occurrence of infantile hypertrophic pyloric stenosis and congenital heart defects: a nationwide cohort study

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  • Bjarke Feenstra
  • Sanne Gørtz
  • Marie Lund
  • Mattis F Ranthe
  • Frank Geller
  • Mads Melbye
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BACKGROUND: Recent studies suggest that infantile hypertrophic pyloric stenosis (IHPS) and congenital heart defects (CHDs) may share some genetic risk factors, but little is known about the co-occurrence of the two conditions in patients.

METHODS: Our study cohort included 2,212,756 persons born in Denmark 1977-2013. We identified patients with IHPS and CHD in the National Patient Register. Using log-linear Poisson regression, we estimated the (incidence) rate ratios (RRs) comparing the rate of IHPS among children with a CHD diagnosis (exposed) and the rate among those without such a diagnosis.

RESULTS: Twenty-seven thousand three hundred and fifty-seven children in the cohort were diagnosed with CHD out of whom 85 developed IHPS (RR = 2.62, 95% confidence interval (CI) 2.09-3.22]). The results were similar for those with and without other congenital malformations, for preterm and term deliveries, and for both sexes. There was, however, a significant effect of calendar period (P = .003). In the period 1977-1996, the RR of IHPS given a CHD diagnosis was 1.96 (95% CI 1.41-2.64); in the period 1997-2014, the RR was 3.75 (95% CI 2.74-4.99).

CONCLUSION: CHD was associated with an increased risk of IHPS. Further research is needed to delineate molecular-level mechanisms that may affect both conditions.

Original languageEnglish
JournalPediatric Research
Volume85
Issue number7
Pages (from-to)955-960
Number of pages6
ISSN0031-3998
DOIs
Publication statusPublished - Jun 2019

ID: 58391290