The Oswestry Disability Index (ODI) is often described as the gold-standard measure of disability from low back pain. This page explains what the ODI is, what it measures, the items it contains, how it is scored, and how it is used.
What is the Oswestry Disability Index?
The Oswestry Disability Index (ODI) is a ten-section, self-completed questionnaire that quantifies functional disability caused by low back pain. It was developed by Jeremy Fairbank and colleagues and first published in 1980, with a widely used revised version published in Spine in 2000. It is one of the most frequently cited outcome measures for low back pain and is often regarded as a gold standard for measuring low-back functional disability.
What does the ODI measure?
The ODI measures how low back pain limits a person's ability to manage everyday life, emphasizing functional disability rather than pain intensity alone. It produces a single percentage score representing overall disability.
What questions are included in the ODI?
The ten sections cover pain intensity, personal care, lifting, walking, sitting, standing, sleeping, sex life, social life, and travelling. Each section presents six statements describing increasing levels of difficulty, and the respondent selects the statement that best matches their current situation.
How is the ODI scored?
Each section is scored from 0 (least disability) to 5 (greatest disability). The scores for completed sections are summed, divided by the maximum possible score for those sections, and multiplied by 100 to give a percentage from 0% to 100%. If a section is skipped, the denominator is reduced accordingly. Scores are commonly interpreted as minimal (0 to 20%), moderate (21 to 40%), severe (41 to 60%), crippled (61 to 80%), and bed-bound or symptom magnification (81 to 100%). Reported minimal clinically important differences generally fall in the range of roughly 10 to 13 percentage points.
How is the ODI used in clinical practice?
Clinicians use the ODI to establish a baseline, monitor progress, and evaluate treatment outcomes for low back pain, including after spine surgery. It takes only a few minutes to complete and about a minute to score, and it has high test-retest reliability, which supports its use for tracking change over an episode of care.
Strengths and limitations
The ODI's strengths include wide validation, quick administration, and strong responsiveness for persistent or severe disability. Limitations include that some published versions contain misprints or omit scoring instructions, that the sex-life item is sometimes replaced in modified versions, and that it may be less discriminating than alternatives for very mild disability.
Frequently asked questions
What is a good ODI score? Lower is better; 0 to 20% represents minimal disability.
How is the ODI calculated? Sum the completed section scores, divide by the maximum possible, and multiply by 100 to get a percentage.
What change in ODI is meaningful? A change of roughly 10 to 13 percentage points is commonly cited as clinically meaningful.
References
- Fairbank JCT, Couper J, Davies JB, O'Brien JP. The Oswestry Low Back Pain Disability Questionnaire. Physiotherapy. 1980;66(8):271-273.
- Fairbank JCT, Pynsent PB. The Oswestry Disability Index. Spine. 2000;25(22):2940-2952.
- Davidson M, Keating JL. A comparison of five low back disability questionnaires: reliability and responsiveness. Physical Therapy. 2002;82(1):8-24.
