Development and Psychometric Testing of the Turkish Immunosuppressive Medication Adherence Scale

Objective: The monitoring of immunosuppressive medication adherence is an important issue for solid organ transplant patients. In Turkey, there has been no valid and reliable measurement tool specific to transplantation for evaluation of medication adherence. The aim of this methodological study was to develop and psychometrically test Immunosuppressive Medication Adherence Scale.

Materials and Methods: The Immunosuppressive Medication Adherence Scale was developed, and its validity and reliability were examined using data from 200 solid organ transplant patients. An expert panel evaluated the content validity, and factor analysis was used to evaluate the construct validity. Internal consistency analysis was performed to evaluate the reliability of the scale, and item–total correlations were evaluated.

Results: As a result of exploratory factor analysis, all 11 items were found to be collected in a single dimension, and factor loadings varied between 0.32 and 0.87. All scale items had a good positive significant correlation with the total scale score. Content validity was evidenced by obtaining the views of 13 experts (0.80 content validity index). Cronbach’s α was 0.61.

Conclusion: The Immunosuppressive Medication Adherence Scale has acceptable internal consistency, good content, and construct validity. The scale is appropriate for use in clinical practice settings and research to evaluate immunosuppressive medication adherence of solid organ transplant patients.

Cite this article as: Özdemir Köken Z, Talas MS, Gökmen D. Development and Psychometric Testing of the Turkish Immunosuppressive Medication Adherence Scale. Turk J Nephrol 2019; 28(2): 120-6.