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Related Experiment Videos

Asthma severity: a factor analytic investigation.

W C Bailey1, D M Higgins, B M Richards

  • 1Division of Pulmonary and Critical Care Medicine, University of Alabama, Birmingham.

The American Journal of Medicine
|September 11, 1992
PubMed
Summary

This study developed a multidimensional asthma severity scale using psychometric techniques. The new scale, comprising Symptom Intensity, Airflow Impairment, and Management Intensity, offers a more precise assessment for asthma research.

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Area of Science:

  • Pulmonary Medicine
  • Clinical Psychology
  • Health Services Research

Background:

  • Asthma research necessitates improved measures for assessing disease severity.
  • Current assessment methods for asthma severity lack standardization.
  • Developing reliable and valid instruments is crucial for advancing asthma research.

Purpose of the Study:

  • To develop and evaluate a series of scaled questions for assessing asthma severity.
  • To address the need for improved and standardized measures in asthma research.
  • To enhance the precision in defining asthma severity parameters.

Main Methods:

  • Utilized multivariate and psychometric techniques on data from 199 adult asthma patients.
  • Collected data through interviews, clinic records, and pulmonary function tests (FEV1).

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  • Developed eight scales covering symptoms, inconvenience, comorbidities, medications, and healthcare utilization, alongside a physician rating scale.
  • Main Results:

    • Factor analysis identified three key dimensions of asthma severity: Symptom Intensity, Airflow Impairment, and Management Intensity.
    • The developed scales demonstrated positive correlations with a physician judgment scale.
    • These factors provide a concise summary of asthma severity.

    Conclusions:

    • Asthma severity is a multidimensional construct, not unidimensional.
    • The identified three factors (Symptom Intensity, Airflow Impairment, Management Intensity) offer a comprehensive assessment.
    • Integrating these factors with a physician rating scale can standardize asthma severity assessment in research, promoting comparability.