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Validity and reliability of the EQ-5D for cancer patients in Korea

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Abstract

Purpose

The purpose of this study was to assess the validity and reliability of the Korean version of the EQ-5D health questionnaire for use in patients with cancer in Korea.

Methods

Patients with colorectal cancer were recruited from one ambulatory cancer center. Each participant consecutively self-administered the EQ-5D, the EORTC QLQ-C30, and the Short Form-36 (SF-36). Discriminatory ability was evaluated by comparing the SF-36 subscales with their corresponding EQ-5D dimensions. Convergent validity was assessed by examining the correlations between the EQ-5D index, EORTC QLQ-C30 subscales, and SF-36 scale and summary scores. Test-retest reliability was also evaluated.

Results

Subjects reporting problems in each EQ-5D dimension showed lower scores on all SF-36 subscales. As expected, the relationships were stronger between the EQ-5D functional dimensions and physical function on the EORTC QLQ-C30 and between the EQ-5D anxiety/depression dimension and emotional function on the EORTC QLQ-C30. The EQ-5D index and SF-36 scales were moderately or highly correlated. intraclass correlation coefficient of the EQ-5D index was 0.45.

Conclusions

The Korean version of the EQ-5D may be a valid tool for assessing the health-related quality of life of patients with cancer. However, further research is needed to determine the reliability of the Korean EQ-5D over different time intervals and disease conditions.

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Authors and Affiliations

  1. Department of Preventive Medicine, University of Ulsan College of Medicine, 86, Asanbyeongwon-gil, Songpa-gu, Seoul, 138-736, Korea

    Seon Ha Kim & Min-Woo Jo

  2. University of Ulsan College of Medicine, 86, Asanbyeongwon-gil, Songpa-gu, Seoul, 138-736, Korea

    Jung Sung Hwang

  3. Department of Oncology, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul, 138-736, Korea

    Tae Won Kim & Yong Sang Hong

Authors
  1. Seon Ha Kim
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  2. Jung Sung Hwang
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  5. Min-Woo Jo
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Correspondence to Min-Woo Jo.

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Kim, S.H., Hwang, J.S., Kim, T.W. et al. Validity and reliability of the EQ-5D for cancer patients in Korea. Support Care Cancer 20, 3155–3160 (2012). https://doi.org/10.1007/s00520-012-1457-0

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  • DOI: https://doi.org/10.1007/s00520-012-1457-0

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