BODE index (COPD)
Multidimensional mortality risk grading in stable COPD
Sources last checked: 2026-10-13
BODE index (COPD)
Multidimensional mortality risk grading in stable COPD
Validated in stable COPD, not during an exacerbation. Enter the mMRC grade you have already assessed; the 6-minute walk must follow a standardised protocol.
Interpretation
| 0–2 — quartile 1 | Lowest-risk quartile in the derivation and validation cohorts. |
|---|---|
| 3–4 — quartile 2 | Each additional BODE point carried a hazard ratio of about 1.34 for all-cause death. |
| 5–6 — quartile 3 | Clearly increased risk of death from any cause and from respiratory causes. |
| 7–10 — quartile 4 | Highest-risk quartile, with the highest mortality in the derivation cohort (Celli 2004). |
What is the BODE index (COPD)?
The BODE index combines four measures of COPD severity — Body-mass index, airflow Obstruction (FEV₁), Dyspnoea (mMRC grade) and Exercise capacity (6-minute walk distance) — into a 0–10 score. Celli and colleagues derived it in 207 outpatients with COPD and validated it prospectively in 625 patients, in whom it predicted death better than FEV₁ alone.
When to use it
- Prognostic assessment of stable COPD in clinic or pulmonary rehabilitation
- Discussions about lung-volume reduction or lung transplant referral, where BODE is a common component
- Tracking the multidimensional course of COPD over time
- Research and audit when a validated composite of COPD severity is needed
When not to use it
- During or shortly after an exacerbation — FEV₁, walk distance and dyspnoea are all temporarily worse
- When a standardised 6-minute walk test cannot be performed (e.g. orthopaedic limitation)
- As a guide to choosing inhaled therapy — use the GOLD ABE assessment for that
How it is calculated
FEV₁ % predicted: ≥ 65 → 0 · 50–64 → 1 · 36–49 → 2 · ≤ 35 → 3 6-minute walk: ≥ 350 m → 0 · 250–349 → 1 · 150–249 → 2 · ≤ 149 → 3 mMRC: 0–1 → 0 · 2 → 1 · 3 → 2 · 4 → 3 BMI: > 21 → 0 · ≤ 21 → 1 BODE = sum (0–10)
Clinical pearls and limitations
- Validated in stable COPD, not during an exacerbation. Enter the mMRC grade you have already assessed; the 6-minute walk must follow a standardised protocol.
- Low BMI (≤ 21 kg/m²) scores a point because it marks systemic disease and worse survival in COPD.
- Use post-bronchodilator FEV₁ % predicted, as in the original study.
- Walk distance is the component most responsive to pulmonary rehabilitation, so BODE can improve after rehab even when FEV₁ does not.
- The score is ordinal: quartiles (0–2, 3–4, 5–6, 7–10) were used to show survival differences rather than precise individual probabilities.
Frequently asked questions
What is a high BODE index?
Scores of 7–10 form the highest-risk quartile in the original cohort. Each additional point was associated with roughly a third higher hazard of death from any cause.
Which dyspnoea scale does BODE use?
The modified MRC (mMRC) scale, graded 0–4. Grades 0 and 1 score 0 points, grade 2 scores 1, grade 3 scores 2 and grade 4 scores 3.
Is BODE the same as GOLD staging?
No. GOLD grades 1–4 use FEV₁ alone and GOLD ABE groups use symptoms and exacerbations to guide treatment; BODE is a prognostic composite that adds BMI and exercise capacity.
Can BODE be calculated without a walk test?
Not as validated. Modified versions that replace or add components exist, but they are different scores with their own cut-offs.
Evidence and guidelines
- Primary source: Celli BR, Cote CG, Marin JM, et al. The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease. N Engl J Med 2004;350(10):1005-1012.
- Kamath S et al. Correlation of BODE index with quality of life in stable COPD. J Family Med Prim Care 2020;9(11):5606-5613 — open-access reproduction of the BODE points table and quartiles.
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