ODI: the gold standard for low back pain explained in detail
Complete Oswestry Disability Index guide — 10 sections, formula, 5 interpretation bands, optional section S8 and MCID of 10 points.
What is the ODI?
The ODI (Oswestry Disability Index) was developed by Fairbank et al. (1980) and is considered the global gold standard for assessing functional disability related to chronic low back pain. It is the most widely used outcome instrument in internationally published lumbar spine studies.
The ODI has 10 sections, each scored 0 to 5. The final score is expressed as a percentage (0–100%), where 0% represents no disability and 100% represents maximum disability.
Chronic low back pain, disc herniation, lumbar canal stenosis, spondylolisthesis, post-operative lumbar spine and non-specific low back pain. Used in studies of spinal fusion, disc arthroplasty and decompression surgery.
The 10 sections and their domains
| Section | Domain | Score |
|---|---|---|
| S1 | Pain intensity | 0–5 |
| S2 | Personal care (washing, dressing) | 0–5 |
| S3 | Lifting | 0–5 |
| S4 | Walking | 0–5 |
| S5 | Sitting | 0–5 |
| S6 | Standing | 0–5 |
| S7 | Sleeping | 0–5 |
| S8 | Sex life (optional) | 0–5 |
| S9 | Social life | 0–5 |
| S10 | Travelling | 0–5 |
Calculate the ODI for free
Apply the questionnaire online and get the score with exportable PDF.
Scoring formula
If S8 (sex life) is not answered: maximum = 45 pts
0% = no disability | 100% = maximum disability
Section S8 is the only optional section of the ODI. If the patient indicates the question does not apply for reasons unrelated to pain, the denominator is adjusted to 45. The final score remains valid.
The 5 interpretation bands
| Score (%) | Classification | Clinical interpretation |
|---|---|---|
| 0–20% | Minimal disability | Patient can manage most activities. Postural advice may be sufficient. |
| 21–40% | Moderate disability | Pain limits some activities. Conservative treatment indicated. |
| 41–60% | Severe disability | Pain significantly compromises ADL. Detailed investigation required. |
| 61–80% | Crippling disability | Pain affects all aspects of life. Urgent intervention needed. |
| 81–100% | Maximum disability / exaggeration | Patient bed-bound or possible symptom exaggeration. Priority specialist evaluation. |
MCID and use in scientific publications
| Study | MCID | Context |
|---|---|---|
| Grotle et al. (2004) | 10 pts | Acute and chronic low back pain |
| Hägg et al. (2003) | 10 pts | Post-operative spine |
| Ostelo et al. (2008) | 10 pts | Systematic review — consensus |
The ODI is mandatory in virtually all lumbar spine surgery studies published in high-impact journals (Spine, EJSO, JBJS). A reduction of ≥ 10 percentage points is the most widely accepted criterion for clinically relevant improvement.
References
- 1. Fairbank JC, Couper J, Davies JB, O'Brien JP. “The Oswestry low back pain disability questionnaire.” Physiotherapy, 1980;66(8):271–3.
- 2. Fairbank JC, Pynsent PB. “The Oswestry Disability Index.” Spine, 2000;25(22):2940–52.
- 3. Grotle M, Brox JI, Vollestad NK. “Concurrent comparison of responsiveness in pain and functional status measurements used for patients with low back pain.” Spine, 2004;29(21):E492–501.