Έλεγχος της εγκυρότητας και αξιοπιστίας των μετρήσεων της κλίμακας Γενικής Αυτο-αποτελεσματικότητας (GSE) σε Έλληνες ασθενείς με Χρόνια Αποφρακτική Πνευμονοπάθεια (ΧΑΠ)

Abstract

Objective: The present study was designed to examine the validity and reliability of the General Self-efficacy (GSE) responses in greek patients with COPD. Methods: The GSE scale (n=50) was examined for construct and criterion validity as well as internal consistency. Results: Principal Components Analysis (PCA) revealed a two (2) factors solution (action self-efficacy and coping self-efficacy with eigen values 1.65 and 5.31 respectively) and 69.67% total variability. Higher GSE scores were found between the following COPD groups: a) smokers versus non-smokers (p <0.001), b) patients without visiting the emergency department versus COPD patients with 1-2 visits in the last year (p <0.001), c) patients with regular follow-up versus patients with follow-up only in deterioration of symptoms (p <0.001) and d) among patients of the four quarters of the BODE index (F =2.89, p =0.04). Concurrent validity testing showed low to moderate high correlations between the GSE score with 3CRT (r = 0.29, p <0.01) and 6MWDT (r = 0.66, p <0.01), while negative correlations were found between the GSE score with age (r = -0.28, p <0.01) and BODE index (r = - 0.28, p <0.05). Further multiple linear regression analysis showed that 6MWDT was the predictor variable (Beta= 0.72, p <0.001) for the GSE for the specific sample of COPD patients. The GSE showed high internal consistency (Cronbach' s alpha = 0.89). Conclusions: The GSE provided validity and reliability evidence for the specific greek sample with COPD.