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Relations among asthma knowledge, treatment adherence, and outcome
Joyce Ho1, Bruce G Bender, Leslie A Gavin
1National Jewish Medical and Research Center, University of Denver, and University of Colorado Health Sciences Center, Denver 80206, USA.
The Journal of Allergy and Clinical Immunology
|March 19, 2003
Summary
This study found that the developed asthma knowledge questionnaire had poor reliability and did not correlate with treatment adherence or outcomes in children with asthma. Asthma knowledge may not be a simple construct to measure effectively.
Area of Science:
- Pediatric Pulmonology
- Health Outcomes Research
- Psychometrics
Background:
- Asthma knowledge is widely assumed to be essential for effective asthma management.
- Existing asthma knowledge questionnaires lack rigorous validation and widespread acceptance.
- A contemporary, validated measure of asthma knowledge is needed.
Purpose of the Study:
- To develop and validate an Asthma Knowledge Questionnaire (AKQ).
- To assess the AKQ's psychometric properties.
- To examine the association of asthma knowledge with demographics, psychosocial factors, medication adherence, and treatment outcomes.
Main Methods:
- A 25-item AKQ was developed with expert input.
- 155 parents of children with asthma completed the AKQ, demographic, family functioning, and home environment measures.
- Asthma outcomes and medication adherence were tracked over 12 months.
Main Results:
- The AKQ exhibited poor reliability.
- No significant association was found between asthma knowledge, treatment adherence, or outcomes.
- Asthma knowledge was not unidimensional and not solely dependent on education level.
Conclusions:
- Developing a simple, self-report asthma knowledge instrument for measuring self-management mastery may be unfeasible.
- Current findings challenge the utility of asthma knowledge questionnaires as primary outcome measures.
- Further research is needed to understand the complex relationship between asthma knowledge and management.
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