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Changes in asthma severity in Manitoba

D Erzen1, L L Roos, J Manfreda

  • 1Department of Medicine, University of Manitoba, Winnipeg, Canada.

Chest
|July 1, 1995
PubMed
Summary
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Asthma diagnosis prevalence increased significantly from 1983 to 1988, but key indicators of asthma severity, such as hospitalizations and emergency visits, did not worsen during this period.

Area of Science:

  • Pulmonary Medicine
  • Epidemiology
  • Health Services Research

Background:

  • Physician-diagnosed asthma prevalence has been a growing concern.
  • Understanding trends in asthma severity is crucial for public health.
  • Previous studies have indicated shifts in respiratory disease management.

Purpose of the Study:

  • To evaluate changes in asthma severity markers between 1983 and 1988.
  • To analyze trends in hospitalizations, emergency visits, and physician contacts for asthma patients.
  • To compare asthma severity changes with those of bronchitis and COPD.

Main Methods:

  • Utilized cross-sectional data from physicians' claims.
  • Analyzed data from the Provincial Health Insurance Plan for fiscal years 1983 and 1988.

Related Experiment Videos

  • Examined markers of asthma severity including hospitalizations, ICU admissions, emergency department visits, physician contacts, and specialist referrals across different age groups.

    • Main Results:

    • Physician-diagnosed asthma increased by 36.4% from 1983 to 1988.
    • Hospitalization rates for asthma declined by 2.5%, and emergency department visits decreased by 3.5%.
    • Specialist referrals increased, primarily in the youngest age group, without a corresponding rise in other severity indicators.

    Conclusions:

    • Despite a substantial increase in asthma diagnoses, the severity of asthma did not increase between 1983 and 1988.
    • Trends in asthma severity mirrored those observed in bronchitis and COPD patients.
    • The findings suggest a potential over-diagnosis or reclassification of asthma without a concurrent increase in disease severity.