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Perceived control of asthma and quality of life among adults with asthma.

Authors
Katz-PP; Yelin-EH; Eisner-MD; Blanc-PD
Source
Ann Allergy, Asthma, & Immun 2002 Sep; 89(3):251-258
NIOSHTIC No.
20029533
Abstract
BACKGROUND: Perceived control of certain chronic conditions influences health status outcomes. OBJECTIVE: To explore the impact of perceived control of asthma on asthma-specific and generic health status outcomes among adults with asthma. Perceived control was defined as individuals' perceptions of their ability to deal with asthma and its exacerbations. METHODS: Data were drawn from the baseline and first two followups of a longitudinal study of adults with asthma surveyed by telephone at 18-month intervals. An 11-item questionnaire (Perceived Control of Asthma Questionnaire [PCAQ]) was developed and validated. RESULTS: The PCAQ demonstrated high internal consistency (Cronbach's alpha = 0.79). Greater perceived control was associated with less severe asthma, greater asthma self-efficacy, lower perceived asthma severity, lower perceived danger from asthma, and greater perceived usefulness of asthma medicines. Greater perceived control was significantly associated with better asthma-specific quality of life concurrently and 18 and 36 months later, after controlling for demographics, smoking, and severity of asthma. Greater perceived control as also significantly associated with generic mental health outcomes concurrently and 18 and 36 months later, after controlling for covariates. Perceived control was associated with physical function concurrently and 18 months later, but not 36 months later. CONCLUSIONS: The PCAQ is a reliable and valid measure of perceived control of asthma. Perceived control of asthma was associated with both asthma-specific and generic health status outcomes, concurrently and predictively. If perceived control could be modified, better outcomes, particularly better psychologic outcomes, might be achieved for individuals with asthma.
Keywords
Chronic-exposure; Respiratory-irritants; Pulmonary-function; Pulmonary-system; Smoking; Psychological-effects; Psychological-responses; Respiratory-system-disorders; Pulmonary-system-disorders; Questionnaires; Bronchial-asthma
Contact
Department of Medicine, University of California, San Francisco 94143-0920
CODEN
ALAIF6
Publication Date
20020901
Document Type
Journal Article
Email Address
pkatz@itsa.ucsf.edu
Funding Amount
372965
Funding Type
Grant
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003480
Issue of Publication
3
ISSN
1081-1206
Priority Area
Research Tools and Approaches: Social and Economic Consequences
Source Name
Annals of Allergy, Asthma, and Immunology
State
CA
Performing Organization
Cardiovascular Research Institute, The University of California, San Fransico California
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