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Classifying asthma: disagreement among specialists.

Kirsten M Baker1, Donald A Brand, Jacob Hen

  • 1Children's Medical Group, 299 Washington Avenue, Hamden, CT 06518, USA. kirsten@pol.net

Chest
|December 11, 2003
PubMed
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Pediatric asthma specialists showed poor agreement when classifying asthma severity using national guidelines. This inconsistency highlights a need to refine the current asthma classification system for better clinical application.

Area of Science:

  • Pulmonology
  • Allergy and Immunology
  • Pediatric Medicine

Background:

  • The National Institutes of Health (NIH) developed asthma practice guidelines that include a system for classifying asthma severity.
  • Accurate asthma severity classification is crucial for consistent and effective treatment.

Purpose of the Study:

  • To evaluate the interrater reliability of the NIH asthma severity classification system among pediatric asthma specialists.
  • To assess agreement in classifying asthma severity and identifying key classification factors.

Main Methods:

  • A survey with eight pediatric asthma case summaries was sent to 24 board-certified pediatric allergists and pulmonologists.
  • Physicians classified asthma severity, identified influencing factors, interpreted pulmonary function tests, and recommended treatments.

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  • Kappa statistics were used to measure interrater agreement.

    • Main Results:

    • A 58% response rate was achieved (14 of 24 surveys returned).
    • Poor agreement was found for asthma severity classification (kappa = 0.29) and the factors influencing classification (kappa = 0.19).
    • Higher agreement was observed in interpreting pulmonary function tests, but treatment recommendations varied due to classification inconsistencies.

    Conclusions:

    • The study reveals low interrater reliability among pediatric asthma specialists for the current NIH asthma severity classification system.
    • There is a clear need to refine the national asthma classification system to improve consistency in its application.
    • Refinement could lead to more standardized and effective asthma management strategies.