Reliability and validity of Chinese version Self-efficacy for Appropriate Medication Use Scale in the coronary heart disease patients

Abstract

Objective To explore the applicability of Chinese version Self-efficacy for Appropriate Medication Use Scale (SEAMS) in evaluating the medication adherence of patients with coronary heart disease. Methods A total of 245 patients with coronary heart disease were selected from circulation department of a classⅢ grade A hospital in Dalian using convenience sampling method. The reliability and validity of SEAMS was evaluated in the study. Results SEAMS had a good reliability, with the Cronbach′s α of 0.948. The Cronbach′s α of the two branch scales were 0.946 and 0.899. The split-half reliability of SEAMS was 0.954, which the split-half reliabilities of the two branch scales were 0.942 and 0.891. The test-retest reliability of SEAMS was 0.928. The test-retest reliabilities of the two branch scales were 0.917 and 0.700. The factor analysis showed that there were two main factors with a cumulative variance rate of 72.994%. Each factor had a load capacity of 0.471-0.910, both of which were over 0.4. The confirmatory factor analysis revealed a good fit of two factors model. The Pearson correlation analysis showed that the criterion-related validity was 0.881. Conclusions The Chinses version SEAMS has a good reliability and validity, and can be used to evaluate the medication adherence of patients with coronary heart disease in our country. Key words: Coronary heart disease; Self efficacy for Appropriate Medication Use Scale; Reliability; Validity