Oswestry Disability Index
Oswestry Disability Index (ODI)
Purpose
The Oswestry Disability Index (ODI), also known as the Oswestry Low Back Pain Disability Questionnaire, is a self-report questionnaire used to measure perceived disability related to low back pain. The questionnaire asks the evaluee to rate how back pain affects everyday activities such as pain intensity, personal care, lifting, walking, sitting, standing, sleeping, social activity, travel, and sexual activity where applicable.
Within a Functional Capacity Evaluation (FCE), the ODI is not used as a stand-alone measure of work capacity, effort, symptom validity, malingering, or functional ability. It provides information regarding the evaluee’s perceived level of disability and should be interpreted alongside objective clinical findings, observed functional performance, pain behaviours, physiological responses, and consistency across the evaluation.
Administration
- The evaluee completes 10 sections related to daily function and low back pain.
- Each section is scored from 0 to 5.
- Sum all answered item scores to obtain the raw score.
- Convert the raw score to a percentage using the number of answered sections.
| Response Score | Meaning |
|---|---|
| 0 | Least limitation for that section |
| 1–4 | Increasing levels of reported limitation |
| 5 | Greatest limitation for that section |
Scoring
The ODI is reported as a percentage score from 0% to 100%. If all 10 sections are completed, the maximum raw score is 50. If one or more sections are not answered or are not applicable, the denominator should be adjusted based only on the number of answered sections.
Formula
ODI Score (%) = (Total Scored Points ÷ (5 × Number of Answered Sections)) × 100
For example:
- Raw Score = 10/50 = 20%
- Raw Score = 20/50 = 40%
- Raw Score = 30/50 = 60%
- Raw Score = 40/50 = 80%
Domains Assessed
The ODI evaluates perceived disability across ten common activities of daily living:
- Pain Intensity
- Personal Care
- Lifting
- Walking
- Sitting
- Standing
- Sleeping
- Sex Life (if applicable)
- Social Life
- Travelling
Interpretation
Higher ODI scores indicate greater perceived disability related to low back pain. The ODI reflects the evaluee's subjective report of limitation and does not independently establish demonstrated functional capacity.
| ODI Score | Disability Level | Interpretation |
|---|---|---|
| 0–20% | Minimal Disability | The evaluee reports that they can manage most activities of daily living. Symptoms may be present but generally have a limited impact on overall function. |
| 21–40% | Moderate Disability | The evaluee reports increased difficulty with activities such as sitting, standing, lifting, travelling, social participation, and work-related activities. Personal care is typically preserved. |
| 41–60% | Severe Disability | The evaluee reports that pain is a significant problem and that activities of daily living are substantially affected. |
| 61–80% | Crippling Disability | The evaluee reports that back pain substantially affects most aspects of daily life and function. |
| 81–100% | Bed-Bound or Symptom Magnification Range | The evaluee reports very severe limitation. Scores in this range should be interpreted carefully in relation to objective findings and overall consistency of presentation. |
Clinical Considerations
The ODI is one of the most widely used outcome measures for individuals with low back pain. It assists the evaluator in understanding the evaluee's perception of disability and identifying activities that the evaluee believes are affected by their condition.
Within an FCE, the ODI should be viewed as one component of the overall evaluation. The questionnaire reflects perceived disability rather than demonstrated ability. Self-reported limitations should therefore be interpreted alongside observed function, biomechanical performance, physiological responses, pain behaviours, and consistency across testing.
Differences between ODI scores and demonstrated performance may occur for a variety of reasons including fear of movement, pain-related distress, psychosocial influences, recovery expectations, symptom focus, or differences between perceived and actual ability. Such discrepancies should be described clinically rather than automatically interpreted as symptom exaggeration or poor effort.
The ODI can also be useful for establishing a baseline and monitoring perceived disability over time. Changes of approximately 10 percentage points are commonly considered clinically meaningful.
Relationship to Functional Capacity Evaluation
The ODI provides information regarding how the evaluee perceives their disability. In contrast, a Functional Capacity Evaluation measures demonstrated functional performance through direct observation of activities such as lifting, carrying, pushing, pulling, positional tolerances, mobility, and work-related tasks.
As a result, ODI findings should not be used independently to determine work capacity, return-to-work readiness, disability status, effort, or symptom validity. Final opinions should be based upon the integration of subjective reports, objective examination findings, demonstrated performance, physiological responses, and consistency across the evaluation.
Sample Documentation Statements
ODI 0–20% (Minimal Disability)
The evaluee obtained an ODI score of 14%. This score falls within the minimal disability range and suggests that low back symptoms are reported to have a limited impact on activities of daily living. Findings should be interpreted in conjunction with the remainder of the evaluation.
ODI 21–40% (Moderate Disability)
The evaluee obtained an ODI score of 32%. This score falls within the moderate disability range and suggests increased reported difficulty with activities such as sitting, standing, lifting, walking, travel, or social participation. Findings should be interpreted alongside objective examination findings and observed functional performance.
ODI 41–60% (Severe Disability)
The evaluee obtained an ODI score of 48%. This score falls within the severe disability range and suggests that low back pain is reported to substantially affect activities of daily living. This finding should be interpreted alongside objective examination findings and demonstrated functional performance.
ODI 61–80% (Crippling Disability)
The evaluee obtained an ODI score of 68%. This score falls within the crippling disability range and suggests that back pain is reported to affect most aspects of daily life. Findings should be interpreted in relation to observed function, physiological response, and consistency across the evaluation.
ODI 81–100% (Bed-Bound or Symptom Magnification Range)
The evaluee obtained an ODI score of 86%. This score falls within the bed-bound or symptom magnification range and indicates very severe reported limitation. This finding should be interpreted cautiously and compared with objective findings, observed behaviours, physiological responses, demonstrated performance, and consistency throughout the evaluation.
Limitations
The ODI is a self-report questionnaire and therefore depends upon the evaluee's perception of their symptoms and functional limitations. Results may be influenced by pain intensity, emotional distress, fear avoidance, recovery expectations, psychosocial factors, cultural influences, or other non-physical variables.
Consequently, ODI scores should never be interpreted in isolation. The strongest clinical conclusions are reached when self-report measures are integrated with objective examination findings and demonstrated functional performance.
References
- Fairbank JC, 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.
- Vianin M. Psychometric properties and clinical usefulness of the Oswestry Disability Index. Journal of Chiropractic Medicine. 2008;7(4):161-163.
- Shaw WS, Pransky G, Patterson W, Winters T. Early disability risk factors for low back pain assessed in a primary care setting. Spine. 2005;30(5):572-580.
- Current Concepts in Functional Capacity Evaluation: A Best Practices Guideline. 2018.