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Validation of the Korean version of the EORTC QLQ-C30

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Abstract

This study evaluated the Korean version of the EORTC QLQ-C30 (version 3.0) in terms of psychometric properties and its validation. One hundred and seventy patients completed three questionnaires EORTC QLQ-C30, the Beck depression inventory (BDI), and a brief pain inventory (BPI). Multitrait scaling analyses demonstrated that all scales met multidimensional conceptualization criteria, in terms of convergence and discrimination validity. Cronbach's α coefficients for eight multiple-item scales were greater than 0.70, with the exception of cognitive functioning. All interscale correlations were statistically significant in the expected direction (p < 0.01). Multivariate analyses showed that physical and emotional functioning were significant explanatory variables for the global quality-of-life (QOL) scale (regression coefficients: 0.36, p < 0.001; and 0.37, p < 0.001; respectively). All scales were significantly associated with pain severity and interference of the BPI, and with the cognitive-affective and somatic scales of the BDI. The emotional-functioning scale was substantially correlated with the cognitive-affective scale and somatic scale of the BDI. These results demonstrate that the Korean version of the EORTC QLQ-C30 is a valid instrument for evaluating Korean-speaking patients with cancer, and can be used to distinguish clearly between subgroups of patients of differing performance status.

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Authors and Affiliations

  1. Research Institute and Hospital, National Cancer Center, Goyang, Korea

    Y.H. Yun, Y.S. Park, E.S. Lee, S.Y. Park & C.H. You

  2. Department of Internal Medicine, Gachon Medical School, Incheon, Korea

    S.-M. Bang

  3. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea

    D.S. Heo

  4. EORTC Quality of Life Unit, Brussels, Belgium

    K. West

Authors
  1. Y.H. Yun
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  2. Y.S. Park
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  3. E.S. Lee
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  4. S.-M. Bang
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  5. D.S. Heo
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  6. S.Y. Park
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  7. C.H. You
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  8. K. West
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Yun, Y., Park, Y., Lee, E. et al. Validation of the Korean version of the EORTC QLQ-C30. Qual Life Res 13, 863–868 (2004). https://doi.org/10.1023/B:QURE.0000021692.81214.70

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  • DOI: https://doi.org/10.1023/B:QURE.0000021692.81214.70

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