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Self-efficacy expectations predict survival for patients with chronic obstructive pulmonary disease
R M Kaplan1, A L Ries, L M Prewitt
1Department of Family and Preventive Medicine, University of California, San Diego.
Summary
Self-efficacy expectations predict survival in patients with chronic obstructive pulmonary disease (COPD). While significant alone, self-efficacy
Area of Science:
- Pulmonary Medicine
- Psychology
- Gerontology
Background:
- Chronic obstructive pulmonary disease (COPD) is a progressive lung disease.
- Prognostic factors for COPD patients are crucial for clinical management.
- Self-efficacy, a belief in one's ability to succeed, may influence health outcomes.
Purpose of the Study:
- To assess the validity of self-efficacy expectations as predictors of mortality in COPD patients.
- To determine if self-efficacy provides prognostic information beyond physiological measures of disease severity.
Main Methods:
- 119 COPD patients completed physiological assessments: forced expiratory volume in 1 s (FEV1.0), partial pressure of oxygen (PaO2), diffusing capacity (DLCO), and maximum oxygen uptake (VO2max).
- Self-efficacy expectation for treadmill walking was measured via self-report.
- Univariate and multivariate survival analyses were used to predict 5-year survival.
Main Results:
- Self-efficacy was a significant univariate predictor of 5-year survival.
- In multivariate analysis, controlling for FEV1.0, self-efficacy showed only a marginal effect on survival.
- Physiological measures like FEV1.0 were stronger predictors of mortality.
Conclusions:
- Self-efficacy expectations offer some prognostic value in COPD patients.
- Simple self-report measures can provide valuable information about a patient's health status.
- Further research is needed to clarify the role of self-efficacy in COPD prognosis alongside objective clinical indicators.