Reliability of Thai-Version Of Neck Disability Index (Thai-Ndi) For Disability Evaluation In Subacute And Chronic Neck Pain Patients

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Jaruwan Kittiwarawut
Supannee Amnuaypornsathit


Background and Objective : The Neck disability Index was designed for disability evaluation in the patient who was suffering from neck pain. It was published worldwide. The purpose of this study is to assess the reliability of Thai-version of the Neck Disability Index in the dimension of disability evaluation among the patients with subacute and chronic neck pain.

Methods : The data were collected form questionnaire replied by the 76 subacute and chronic neck pain patients treating in the rehabilitation clinic, Burapha University Hospital, during February 2012 to July 2013. The reliability of Thai-version of the Neck Disability Index was assessed, and accepted at  Chronbach’s alpha > 0.8.

Results : Most questionnaire respondents were female (76%), ranging from 20-65 years old, an average age is 47.9 years, an average pain duration is 22.6 months (Min-Max: 1-120, Median: 12). The most of patients have had miserable neck pain during 6 months to 2 years, the average pain severity score is 6.3 + 1.8 and average Thai –NDI score is 13.9 + 6.8. Cronbach’s alpha is 0.835.

Conclusions : The reliability of Thai-NDI is acceptable in both total score and each 10-items score. Thai-NDI has highest reliability for patients within two years duration of neck pain. Significant correlation between Thai-NDI and pain severity score (p<0.001, R = 0.417).


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