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Agreement between current and active asthma classification methods, Asthma Call-back Survey, 2011-2012.

Katelynn E Dodd1, Jacek M Mazurek1

  • 1a Respiratory Health Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention (CDC) , Morgantown , West Virginia , USA.

The Journal of Asthma : Official Journal of the Association for the Care of Asthma
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Summary

This study found substantial agreement between current and active asthma classifications in adults. Removing doctor consultations from the active asthma definition improved agreement, aiding in accurate asthma identification.

Keywords:
ACBSBRFSSCurrent asthmaactive asthmaagreementclassification

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Area of Science:

  • Public Health
  • Epidemiology
  • Survey Research

Background:

  • Accurate identification of individuals with asthma is crucial for effective public health interventions.
  • Various survey-based methods exist to classify asthma status, but their agreement needs assessment.

Purpose of the Study:

  • To evaluate the agreement between 'current asthma' and 'active asthma' classifications using survey data.
  • To determine if modifying the 'active asthma' definition impacts classification agreement.

Main Methods:

  • Analysis of 2011-2012 Asthma Call-back Survey data from US adults (≥18 years) ever diagnosed with asthma.
  • Defined 'current asthma' as self-reported ongoing asthma.
  • Defined 'active asthma' based on recent doctor consultations, medication use, or symptoms; assessed agreement using Kappa statistic.

Main Results:

  • An estimated 72% had current asthma and 75% had active asthma.
  • 67% of individuals met both classifications; 20% met neither.
  • Kappa statistic indicated substantial agreement (0.68), which improved to 0.72 when doctor consultations were excluded from the active asthma definition.

Conclusions:

  • There is substantial agreement between current and active asthma classifications in adults.
  • Excluding 'talking to a doctor about asthma' from the active asthma definition enhances classification agreement.