Abstract
The objective of this study was to validate the Asthma Symptom Checklist (ASC) so that it could be reliably used to assess the subjective symptomatology of asthma attacks in our context. Subjective symptomatology of asthma was examined in a group of 100 adult Spanish outpatients (57 women, 43 men; 17-69 years of age) with asthma. All of them completed the modified version of the ASC as well as questionnaires of depression, anxiety, and self-management of asthma (self-efficacy expectancies and health care utilization). Data about duration and severity of asthma, as well as dyspnea and %FEV1, were also recorded. The highest reliability Cronbach alpha indexes were for the panic-fear and fatigue scales. The oblique rotation of the ASC revealed five correlated factors (53% of the total variance explained): 1) panic-fear, 2) airways obstruction, 3) airways obstruction and panic-fear, 4) fatigue and irritability, 5) hyperventilation. The structure of factors was revalidated using orthogonal (varimax) rotation. Construct validity was examined by Person product-moment coefficient correlations, ANOVAs (asthma severity x ASC scores), and t-tests (sex by ASC scores). Panic-fear showed the best construct validity, as it was related to the s...Continue Reading
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