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  • Title: Translation, revision, and validation of the Chinese version of the Satisfaction with Oral Anti-Diabetic Agent Scale (C-SOADAS) in patients with type 2 diabetes mellitus.
    Author: Lin YJ, Wang CY, Chang EH, Cheng SW, Ko Y.
    Journal: Patient Prefer Adherence; 2018; 12():667-672. PubMed ID: 29750021.
    Abstract:
    OBJECTIVE: The aim of this study was to translate, adapt, and validate the Satisfaction with Oral Anti-Diabetic Agent Scale (SOADAS) in type 2 diabetes mellitus (DM) patients taking oral antidiabetic drugs (OADs) in Taiwan. PATIENTS AND METHODS: The SOADAS was translated to Chinese and was modified based on reviews of two physicians, five diabetes educators, and two patient focus groups. A cross-sectional interviewer-administered survey was conducted in adult patients with type 2 DM who were taking OADs. The Chinese version of the SOADAS (C-SOADAS), the EuroQol 5 dimensions 3-level (EQ-5D-3L) questionnaire, and a demographic questionnaire were administered to participants. Instrument structure, internal consistency, convergent validity, and known-group validity were assessed. RESULTS: A total of 260 DM patients were recruited. The mean score of an individual item ranged from 3.6 to 3.9, while the mean total score (out of 25 possible points) was 18.7 points. Overall, floor and ceiling effects were negligible. The Cronbach's α value was 0.81. All the four predetermined hypotheses for known-group validity assessment were fulfilled. In convergent validity testing, the C-SOADAS total scores were found to be correlated with EuroQol-Visual Analog Scale (EQ-VAS) scores (r = 0.2; p < 0.01) but not with EuroQol 5 dimensions (EQ-5D) index scores (r = 0.02; p = 0.81). CONCLUSION: The 5-item C-SOADAS appears to be a psychometrically acceptable measure of OAD treatment satisfaction among type 2 DM patients in Taiwan. The tool may be incorporated into clinical practice to quickly assess treatment outcomes from patients' perspectives.
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