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Related Experiment Videos

Recurrent and non-recurrent croup: an epidemiological study.

B Cohen1, D Dunt

  • 1Department of Community Medicine, University of Melbourne, Parkville, Victoria, Australia.

Australian Paediatric Journal
|December 1, 1988
PubMed
Summary

Recurrent croup, often linked to inherited airway hyper-reactivity, peaks in winter/autumn and is associated with lower temperatures and family history. Non-recurrent croup shows fewer associations.

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Area of Science:

  • Pediatrics
  • Epidemiology
  • Environmental Health

Background:

  • Croup is a common respiratory illness in children.
  • Understanding the natural history of recurrent versus non-recurrent croup is crucial for effective management.
  • Environmental factors, such as temperature, may influence croup incidence.

Purpose of the Study:

  • To investigate the natural history of recurrent and non-recurrent croup.
  • To analyze seasonal variations and the effect of atmospheric temperature on croup episodes.
  • To explore associations between croup and other diseases in patients and their families.

Main Methods:

  • Community-based study collecting daily temperature data (1977-1983).
  • Case-control study involving 137 children with croup (recurrent and non-recurrent) and 236 matched controls.
  • Analysis of seasonal patterns, temperature effects, and disease associations.

Main Results:

  • Recurrent croup exhibited winter and autumn peaks, occurring on colder days.
  • Recurrent croup was associated with a patient history of asthma/wheezy bronchitis and family history of croup.
  • Non-recurrent croup showed only an autumn peak, with no significant temperature or disease associations.

Conclusions:

  • Recurrent croup suggests persistent, inherited airway hyper-reactivity triggered by viral and environmental factors.
  • Temperature appears to be a significant trigger for recurrent croup episodes.
  • Distinct natural histories differentiate recurrent from non-recurrent croup.

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