Self-Efficacy Scale for Appropriate Medication Use: Turkish Adaptation, Validity and Reliability Study

Validity and Reliability of the Self-Efficacy Scale for Appropriate Medication Use

Abstract

Abstract

Background: Drug use in chronic diseases is a severe problem noticed by physicians in our country. Chronic disorders are treatable with medicine however ensuring drug compliance is difficult.

Objective: The Turkish translation of the Self-Efficacy for Appropriate Medication Use Scale is forthcoming. Its reliability and validity will be examined among patients with at least a year of chronic illness.

Methods: Between July 2021 and December 2021, 414 individuals were interviewed face-to-face at Isparta Family Health Centers. The participants were administered the Turkish versions of the Self-Efficacy for Appropriate Medication Use Scale (T-SEAMS), the General Self-Proficiency Scale, and the Morisky Medication Adherence Scale (MMAS-8). There were evaluations of construct validity, convergent validity, internal consistency, and test–retest reliability.

Results: According to the item analysis, item-to-total correlations varied between 0.349 and 0.607. One exploratory factor with factor loadings ranging from 0.496-0.811 explained 51.485% of the total variance. Acceptable results were obtained from a confirmatory factor analysis (2/df = 3,031, RMESA = 0,070, CFI = 0,965, GFI = 0,945, and TLI = 0,952). Positive correlations were found between the convergent validity of the T-SEAMS and the validated MMAS-8 and General-Self-Proficiency Scale (r=0.607, p0.001; r=0.349, p0.001, respectively). Excellent internal consistency (Cronbach's alpha = 0.916) and test-retest reliability (Pearson's correlation coefficient = 0.702, p 0.001) were observed.

Conclusion: The T-SEAMS is a quick and psychometrically sound instrument for evaluating medication adherence self-efficacy in Turkish people who have a chronic disease.