The Neck Disability Index is a state-unambiguous instrument for the description of a disability. It is revised from the Oswestry Low Back Pain Questionnaire It contains 10 items mentioning various activities (personal care, lifting, driving, work, sleeping, concentration, reading, recreation) and pain (pain intensity, headache) with 6 conceivable answers for each item. Patients are educated to choose only one answer which most closely suits their condition at the current time. The score of each item ranges between 0 (no pain and no functional limitation) and 5 (worst pain and maximal limitation) that lead to the total score of 0 (no disability) to 50 (totally disabled), as 0-4 points (no disability), 5-14 points (10-28% disability), 15-24 points (30-48% disability), 25-34 points (50-64% disability) and 35-50 points (70-100% disability). The meantime to fill the questionnaire is 3-7.8 minutes. The NDI showed high validity and reliability for patients with neck pain.~By this study, the accuracy and reproducibility of the translated versions of NDI questionnaires will be enhanced and thus can create a useful measure to obtain data from culturally/linguistically diverse people belonging to different ethnic background as in Pakistan. It will create trustworthiness among clinicians and researchers to utilize the tool as a measure of what it is supposed to measure.
The aim of the study is to translate the neck disability index (NDI) questionnaire into Pushto, Punjabi, Sindhi and Balochi versions and o test the validity & reliability of translated versions of NDI among neck pain patients in Pakistan.