Open Access, Peer-reviewed
pISSN 1226-2102
eISSN 2005-8918
    J Korean Orthop Assoc. 2009 Jun;44(3):350-359. Korean.
    Published online Jun 18, 2009.
    https://doi.org/10.4055/jkoa.2009.44.3.350
    Copyright © 2009 The Korean Orthopaedic Association
    Original Article

    Cross-Cultural Adaptation and Validation of the Korean Version of the Neck Disability Index

    Kyung-Jin Song, M.D., Byung-Wan Choi, M.D.,* Sul-Jeon Kim, M.D.,* and Sun-Jung Yoon, M.D.
      • Department of Orthopedic Surgery, College of Medicine, Institute for Medical Sciences, Chonbuk National University, Jeonju, Korea.
      • *Gwangju Veterans Hospital, Gwangju, Korea.
    • Address reprint requests to Byung-Wan Choi, M.D. Department of Orthopaedic Surgery, Gwangju Veterans Hospital, 887-1, Sanwol-dong, Gwangsan-gu, Gwangju 506-705, Korea. Tel: +82.62-602-6162, Fax: +82.62-602-6989, Email: alla1013@naver.com

    Abstract

    Purpose

    To translate and culturally adapt a Korean version of the Neck Disability Index (NDI), as well as to validate its use in Korean patient.

    Materials and Methods

    The NDI was linguistically translated into Korean and the prefinal version was assessed and modified by a pilot study. The Korean version was tested on 60 patients with degenerative cervical spine disease to verify the reliability and validity. The test-retest reliability, internal consistency, concurrent validity, and construct validity were examined by a comparison with the VAS and SF-36.

    Results

    The intraclass correlation coefficient of test-retest reliability was 0.927. The reliability estimated by the internal consistency reached a Cronbach's alpha of 0.82. The correlation of the NDI with VAS was r=0.489 (p=0.002) and correlation between NDI and SF-36 was r=-0.44 (p<0.01). The physical health component score of SF-36 showed a high correlation with the NDI as well as a high correlation between VAS and mental health component scores of SF-36.

    Conclusion

    The Korean version of the NDI is a reliable and valid instrument for measuring the disability in Korean patient with cervical problems and can be useful in future clinical studies in Korea.

    Keywords
    Neck Disability Index; Cross-cultural adaptation; Validity

    Figures

    Fig. 1
    Comparison of the mean values of NDI, VAS, SF-36 according to the sexual difference.

    Fig. 2
    Comparison of the mean values of NDI, VAS, SF-36 according to the diagnosis.

    Tables

    Table 1
    Baseline Participant Demographics

    Table 2
    NDI Scores according to the Questionnaire

    Table 3
    Correlation between NDI, VAS and SF-36

    Table 4
    Correlation between NDI and SF-36 according to the Questionnaire of SF-36

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    MeSH Terms
    Buprenorphine
    Humans
    Korea
    Mental Health
    Neck
    Pilot Projects
    Reproducibility of Results
    Spine
    Metrics
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