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Domains, constructs and the development of the breathing problems questionnaire
1Department of Psychology, University of Plymouth.
Summary
This study developed the 13-domain Breathing Problems Questionnaire (BPQ) for chronic bronchitis, distinguishing functional problems from negative evaluations to better understand patient quality of life (QoL). Findings highlight distinct correlations between QoL aspects and health outcomes or personality traits.
Area of Science:
- Psychometrics
- Health Psychology
- Respiratory Medicine
Background:
- Health-related quality of life (QoL) questionnaires often use content-valid domain subscales.
- Understanding patient experiences requires exploring underlying constructs beyond conventional domains.
Purpose of the Study:
- To develop and validate the 13-domain Breathing Problems Questionnaire (BPQ) for chronic bronchitis patients.
- To contrast content-valid domain subscales with construct-valid subscales.
- To examine constructs relevant to the health experience of patients with chronic obstructive pulmonary disease (COPD).
Main Methods:
- Developed the Breathing Problems Questionnaire (BPQ) with 13 domains.
- Conducted psychometric analyses to evaluate item groupings.
- Correlated questionnaire subscales with measures of morbidity, neuroticism, and extraversion.
Main Results:
- BPQ items formed two distinct groups: functional problems and negative evaluations.
- Functional problems correlated significantly with morbidity.
- Negative evaluations correlated significantly with neuroticism, while positive evaluations correlated with extraversion.
Conclusions:
- The Breathing Problems Questionnaire (BPQ) provides psychometric evidence for distinct functional and evaluative constructs in chronic bronchitis.
- Both domain and construct classifications offer valuable insights into patient QoL.
- Findings suggest that patient evaluations of illness are influenced by perceived severity and personality traits.