The Neck Disability Index (NDI) is a modified version of the Oswestry Low Back Disability Index (ODI) used by clinicians and researchers to quantify disability related to — you guessed it — neck pain.

Developed in the late 1980’s and first published in 1991, the NDI was the first instrument for measuring patient-reported disability in neck pain patients. Since 1991, a number of other questionnaires for neck pain patients have been developed, but NDI remains the oldest and most widely-used of these instruments.

This 10 question survey is filled out by patients, and asks questions related condition-specific functional status, such as: pain, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, and recreation. Each question is scored on a scale of 0-5, with zero indicating the least amount of disability. To obtain the index, the scores of all questions are summed and then doubled.

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Strengths

The NDI has been rigorously tested over the years, and has proven to be a reliable, valid, and responsive PRO tool. It has sufficient support and usefulness to retain its current status as the most commonly used self-reported measure for neck pain.

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