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Population demographic indicators associated with incidence of pyloric stenosis

Teresa To1, Anne Wajja, Paul W Wales

  • 1Population Health Sciences, Research Institute and Departments of Surgery and Pediatrics, Hospital for Sick Children, Toronto, Ontario.

Archives of Pediatrics & Adolescent Medicine
|June 9, 2005
PubMed

Insights

Infant pyloric stenosis (PS) incidence, estimated by pyloromyotomy rates, was higher in rural areas of Ontario. Male infants showed higher rates, consistent with prior studies, suggesting potential environmental factors in PS etiology.

Area of Science:

  • Pediatric Surgery
  • Epidemiology
  • Environmental Health

Background:

  • Pyloric stenosis (PS) is a common surgical condition in infants.
  • Previous studies indicate variations in PS incidence, but etiology remains unclear.
  • Sociodemographic factors may influence PS occurrence.

Purpose of the Study:

  • To determine the incidence of pyloric stenosis (PS) in Ontario infants, using pyloromyotomy rates.
  • To investigate the association between PS incidence and population sociodemographic indicators.
  • To explore regional variations in PS rates.

Main Methods:

  • Utilized hospital discharge data from 1993-2000 for pyloromyotomy rate calculations.
  • Combined four-year data (1993-1996 and 1997-2000) to ensure rate stability.
  • Analyzed small-area variations and correlations with sociodemographic indicators.

Main Results:

  • Pyloromyotomy rates were higher in male infants (84.0%).
  • Significant regional variation in rates was observed, with rural areas showing higher incidence (e.g., 3.30-3.38 per 1000).
  • Living in a rural area remained a significant factor for higher pyloromyotomy risk (OR 1.79), even after adjusting for socioeconomic status and surgeon availability.

Conclusions:

  • Incidence patterns and higher rates in male infants align with previous North American and Swedish studies.
  • Observed rural-urban differences suggest environmental influences may play a role in PS etiology.
  • Further research is warranted to elucidate the environmental factors contributing to PS.
Abstract

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