What is the BODE index?

The BODE index is a composite score developed by Celli et al. (2004) that predicts mortality in COPD patients. It integrates BMI, airflow obstruction (FEV1%), dyspnea (MRC scale), and exercise capacity (6-minute walk test) into a single score from 0 to 10.

What does each BODE quartile mean?

Quartile 1 (0–2 points) has the best prognosis with ~80% 4-year survival. Quartile 2 (3–4) has ~67%, quartile 3 (5–6) ~57%, and quartile 4 (7–10) approximately 18% 4-year survival, indicating very high mortality risk.

Which FEV1 value should I use?

Use the post-bronchodilator FEV1 expressed as a percentage of the predicted normal value for the patient's age, sex, and height. This is the standard spirometry measure used in COPD staging.

What is the MRC dyspnea scale?

The Medical Research Council (MRC) dyspnea scale grades breathlessness from 0 (none) to 4 (too breathless to leave the house). Grade 0 = no dyspnea, 1 = dyspnea on strenuous exercise, 2 = walking on level ground, 3 = stopping after 100 meters, 4 = unable to leave home.

How is the 6-minute walk test performed?

The patient walks as far as possible on a flat surface for 6 minutes. The total distance in meters is recorded. Distances below 150 m score the maximum 3 BODE points; above 350 m scores 0 points.

Is this tool a substitute for clinical judgment?

No. The BODE index is a research-validated prognostic tool to support clinical decision-making, not replace it. Always interpret results in full clinical context.

BODE Index COPD Calculator

Name: BODE Index COPD Calculator
Availability: InStock
Author: Nham Vu

Calculate the BODE index score to estimate prognosis and mortality risk in COPD patients.

Patient Parameters

BMI (kg/m²)

Points: ≤21 = 1 pt | >21 = 0 pts

FEV1 % predicted (post-bronchodilator)

≥65% = 0 pt | 50–64% = 1 pt | 36–49% = 2 pts | ≤35% = 3 pts

MRC Dyspnea Grade

Grade 0 Dyspnea only with strenuous exercise (0 pts) Grade 1 Short of breath when hurrying on level ground (0 pts) Grade 2 Walks slower than peers or stops after 15 min on level ground (1 pt) Grade 3 Stops for breath after walking ~100 m (2 pts) Grade 4 Too breathless to leave the house (3 pts)

6-Minute Walk Distance (meters)

≥350 m = 0 pt | 250–349 m = 1 pt | 150–249 m = 2 pts | <150 m = 3 pts

BODE Score Result

Fill in the parameters and press Calculate.

BODE Score

(out of 10)

Quartile

Better prognosisWorse prognosis

010

Point Breakdown

Variable	Value	Points
Total BODE Index

BODE Scoring Reference

Variable	0 pts	1 pt	2 pts	3 pts
BMI (kg/m²)	>21	≤21	—	—
FEV1 % predicted	≥65%	50–64%	36–49%	≤35%
MRC Dyspnea	0–1	2	3	4
6MWT (meters)	≥350	250–349	150–249	<150

Celli BR et al. N Engl J Med. 2004;350:1005–12. Quartile 4-year survival estimates from the original validation cohort.

Summary

Calculate the BODE index score to estimate prognosis and mortality risk in COPD patients.

How it works

Enter the patient's BMI (body mass index).
Enter the post-bronchodilator FEV1 as a percentage of predicted.
Select the MRC dyspnea grade (0 to 4).
Enter the 6-minute walk distance in meters.
The calculator assigns points for each variable and sums them to yield the BODE index (0–10).
The result panel displays the total score, quartile, and estimated 4-year survival.

Use cases

Estimate mortality risk in patients diagnosed with COPD.
Guide clinical decision-making for lung transplant referral.
Monitor disease progression over time with serial BODE scores.
Supplement FEV1 staging in pulmonology practice.
Communicate prognosis to patients and families.
Assess response to pulmonary rehabilitation programs.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu