Article
The epidemiology of infantile hypertrophic pyloric stenosis in
Sweden 1987-96
G Hedbäcka, K Abrahamssona, B Husbergb, T Granholmb, A Odénc
a Department
of Pediatric Surgery, Drottning Silvias Barn-och Ungdomsjukhus,
Sahlgrenska University Hospital, S-416 85, Gothenburg, Sweden, b Department of Pediatric Surgery,
Astrid Lindgrens Sjukhus, Karolinska Vägen, S-171 76, Stockholm,
Sweden, c Department of Mathematics and
Statistics, University of Gothenburg, Gothenburg, Sweden
Correspondence to: Dr Hedbäck g.hedback{at}home.se
Accepted 12 July
2001
AIMS
To find out whether the
incidence of infantile hypertrophic pyloric stenosis (IHPS) has changed
over the past decade, and if so, to investigate possible contributory factors.
METHODSAll infants undergoing
pyloromyotomy for IHPS in Sweden between 1987 and 1996 were studied.
Using the national patient registers the yearly incidence was
determined and evaluated in relation to sex, latitude, urbanisation,
and type of surroundings by use of a Poisson model.
RESULTSThere was a substantial
decline from 2.7/1000 to 0.85/1000 over the time period. The incidence
in the south was almost three times greater than in the north.
CONCLUSIONThe declining incidence
and geographical difference suggest that environmental factors are of
importance in this disorder.
Keywords: pyloric stenosis; incidence; geographical variation; pyloromyotomy
© 2001 by Archives of Disease in Childhood
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