Έλεγχος της εγκυρότητας και αξιοπιστίας των μετρήσεων της κλίμακας Γενικής Αυτο-αποτελεσματικότητας (GSE) σε Έλληνες ενήλικες με άσθμα

Abstract

Objective: The present study was designed to examine the validity and reliability of the General Self-Efficacy scale (GSE) responses in Greek adults with asthma. Methods: The GSE (n = 50) was examined through construct validity (factor analysis and differences between groups), criterion validity (concurrent and predictive validity) as well as internal consistency reliability. Results: Principal component analysis-PCA revealed a two-factor solution (action self-efficacy and coping self-efficacy with eigen values 4.13 and 1.94 respectively) and 60.70% of explained variability. The GSE showed high internal consistency (Cronbach’s alpha = 0.84). Higher GSE scores were found in the following groups: patients with controlled versus uncontrolled asthma (p <0.001), patients without versus with hyperventilation (p <0.001) and patients with mild versus moderate and severe asthma (p <0.001). Concurrent validity testing showed moderate to high positive correlations for the GSE score with FEV1% (r = 0.49, p <0.01), 6MWDT (r = 0.80, p <0.01) and ACT (r = 0.81, p <0.01), while low to high negative correlations were found for the GSE score with age (r = -0.29, p <0.05), NQ (r = -0.75, p <0.01) and Borg scale as well (r = -0.77, p <0.01). Further multiple linear regression analysis showed that 6MWDT was the predictor variable (Beta = 0.56, p <0.001) of the GSE for the specific sample of asthma patients. Conclusions: The GSE provided validity and reliability evidence for the specific Greek sample with asthma.