• Eun-Hyun Lee, Kwan-Woo Lee, Rhayun Song, Frank J Snoek, and Seung Hei Moon.
• Graduate School of Public Health, Ajou University, 164 Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-380, Republic of Korea. ehlee@ajou.ac.kr.
• Health Qual Life Out. 2014 Jan 1;12:77.

BackgroundThis study was to elucidate the psychometric properties of the Korean version of the Diabetes Symptom Checklist-Revised (K-DSC-R), which is a patient-reported outcome measure of diabetes symptom burden.MethodsA sample of 432 Korean patients with diabetes was recruited from university hospitals. The data were analyzed using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), multitrait/multi-item correlation, Pearson's correlation, t-test, ANOVA, and Cronbach's alpha for construct, item-convergent/discriminant, concurrent, and known-groups validity, and internal consistency reliability.ResultsEFA extracted a total of 29 items clustered into 7 subscales from the K-DSC-R. The construct of the seven-subscales was supported by CFA. The scaling success rates of item-convergent validity were 100% for all subscales, and those of item-discriminant validity ranged from 83.3% to 100%. Patients in more-depressed groups and in the HbA1c-uncontrolled group had higher K-DSC-R scores, satisfying the known-groups validity. The subscales of the K-DSC-R were moderately correlated with health-related quality of life, indicative of the established concurrent validity. The Cronbach's alpha of the K-DSC-R was 0.92.ConclusionsThe psychometric properties of the K-DSC-R have been established. It is thus appropriate for use with respect to reliability and validity in practice and clinical trials for Korean patients with type 2 diabetes.

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