Neck Disability Index (NDI) is a patient-completed, condition-specific functional status questionnaire including pain, personal care, lifting, reading, headaches, concentration, work, driving, sleeping and recreation. Each of the 10 items is scored from 0 - 5, with a maximum score of 50. The obtained score is multiplied by 2 to produce a percentage score. A higher score indicates more patient-rated disability (0 points or 0% means : no activity limitations , 50 points or 100% means complete activity limitation). The minimal clinically important difference or change (MCID / MCIC) is described as the smallest difference or change that patients perceive as beneficial. In patients with cervical radiculopathy the MCID is 7 points of change ( 14%). In order to demonstrate improvement in status, the NDI would need to be reduced by at least 14%.