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[Infantile hypertrophic pyloric stenosis. Decreasing incidence].
J P Nielsen1, P Haahr, J Haahr
1Viborg Sygehus, børneafdelingen. jpnielsen@dadlnet.dk
Ugeskrift for Laeger
|August 5, 2000
Summary
Infantile hypertrophic pyloric stenosis (IHPS) cases significantly declined in Viborg County, Denmark, from 1973 to 1997. This trend mirrored national data, with a notable decrease starting in 1993.
Area of Science:
- Pediatric Surgery
- Epidemiology
- Public Health
Context:
- A clinical suspicion of declining infantile hypertrophic pyloric stenosis (IHPS) frequency prompted this investigation.
- A 25-year retrospective review of IHPS cases in Viborg County, Denmark (1973-1997) was conducted.
- Data was supplemented by a national survey to assess broader trends.
Purpose:
- To confirm the suspected decline in IHPS incidence.
- To analyze the frequency of IHPS per 1000 live births over defined periods.
- To identify potential correlations with changes in infant care recommendations.
Summary:
- 147 IHPS cases were operated in Viborg County between 1973 and 1997.
- IHPS frequency per 1000 live births showed a declining trend, particularly after 1993 (1.6, 2.4, 2.0, 2.8, 0.9 across five-year intervals).
- A similar national trend was observed, suggesting a widespread phenomenon.
Impact:
- The study confirms a significant decrease in IHPS rates.
- A potential, though unconfirmed, association with altered infant sleep positioning recommendations is noted.
- Further research is needed to establish causality and understand the underlying reasons for the decline.