Journal List > J Korean Orthop Assoc > v.44(3) > 1012912

Song, Choi, Kim, and Yoon: Cross-Cultural Adaptation and Validation of the Korean Version of the Neck Disability Index

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.

Figures and Tables

Fig. 1
Comparison of the mean values of NDI, VAS, SF-36 according to the sexual difference.
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Fig. 2
Comparison of the mean values of NDI, VAS, SF-36 according to the diagnosis.
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Table 1
Baseline Participant Demographics
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*standard deviation.

Table 2
NDI Scores according to the Questionnaire
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Table 3
Correlation between NDI, VAS and SF-36
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*physical health component score; mental health component score.

Table 4
Correlation between NDI and SF-36 according to the Questionnaire of SF-36
jkoa-44-350-i004

PF, physical function; PR, physical role; BP, bodily pain; GH, general health; VT, vitality; SF, social functioning; RE, role emotion; MH, mental health.

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