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BODE Index Calculator (Celli 2004)
x402
BODE Index Calculator (Celli 2004) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the BODE index for COPD severity from BMI, FEV1% predicted, MMRC dyspnea grade, and 6-minute walk distance, returning a 0–10 total score and quartile (1–4).
Price / call$0.005
Success—
StatusUnknown
How this service works
Celli 2004 BODE index from BMI (≤21 → 1), FEV1 % predicted (0–3), MMRC dyspnea (0–3), and 6-minute walk in meters (0–3). Returns a 0–10 total and quartile 1–4 (0–2 / 3–4 / 5–6 / 7–10). Deterministic published points with citation. Not a GOLD stage and not a transplant listing.
Output
Returns a BODE total score from 0–10 derived from the four Celli 2004 component subscores, plus a quartile classification (1 = 0–2 points, 2 = 3–4 points, 3 = 5–6 points, 4 = 7–10 points), along with the individual point contributions of each input variable and a published citation.
Example use cases
COPD prognosis at clinic visit
“My patient has a BMI of 22.1, FEV1 at 58% predicted, MMRC grade 2, and walked 320 meters in the 6-minute walk test — what's their BODE score and which quartile does that put them in?”
Tracking COPD progression over time
“Last year this COPD patient scored differently — now their BMI is 18.8, FEV1 is 34% predicted, MMRC is 4, and they only managed 140 meters in the walk test. Can you recalculate their BODE index and quartile to see if they've worsened?”
Automated EMR COPD risk flag
“I have pulmonary function data for a COPD patient: BMI 24.0, FEV1 percent predicted 67, MMRC dyspnea score 1, and 6-minute walk of 390 meters — run the BODE calculation so I can document their risk quartile in the chart.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/bodeWhen to prefer
Use this endpoint when you need a deterministic, citation-backed BODE index calculation for COPD patients per the Celli 2004 criteria — it is ideal for clinical decision support tools, EMR integrations, and research pipelines that require reproducible scoring. Prefer this over manual lookup tables or LLM-based estimation when auditability and exact point mapping (including quartile classification) are required. Note: this does not compute GOLD staging or transplant listing criteria.
Side effects
- Missing required parameters (bmi_kg_m2, fev1_percent_predicted, mmrc, six_minute_walk_m) returns a 400 error
- BMI outside 10–80 range or FEV1 outside 10–150 range may return a validation error
- MMRC value not an integer 0–4 causes a type validation error
- 6-minute walk distance outside 0–1000 meters may be rejected
- Payment not attached or x402 header missing causes a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/bode",
"count": 2,
"items": [
{
"mmrc": 0,
"score": 0,
"formula": "bode",
"citation": {
"id": "celli-2004",
"doi": "10.1056/NEJMoa021322",
"pmid": "14999112",
"title": "The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease",
"source": "N Engl J Med. 2004;350(10):1005-1012",
"authors": "Celli BR, Cote CG, Marin JM, et al."
},
"quartile": 1,
"bmi_kg_m2": 24,
"max_score": 10,
"components": [
{
"value": 24,
"factor": "bmi",
"points": 0,
"present": false
},
{
"value": 70,
"factor": "fev1",
"points": 0,
"present": false
},
{
"value": 0,
"factor": "mmrc",
"points": 0,
"present": false
},
{
"value": 400,
"factor": "six_minute_walk",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"six_minute_walk_m": 400,
"formula_expression": "BODE = bmi_points + fev1_points + mmrc_points + walk_points; BMI <=21 -> 1 else 0; FEV1% >=65 -> 0, 50-64 -> 1, 36-49 -> 2, <=35 -> 3; MMRC 0-1 -> 0, 2 -> 1, 3 -> 2, 4 -> 3; 6MWD m >=350 -> 0, 250-349 -> 1, 150-249 -> 2, <=149 -> 3; quartiles 0-2 / 3-4 / 5-6 / 7-10; max 10",
"fev1_percent_predicted": 70
},
{
"mmrc": 0,
"score": 0,
"formula": "bode",
"citation": {
"id": "celli-2004",
"doi": "10.1056/NEJMoa021322",
"pmid": "14999112",
"title": "The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease",
"source": "N Engl J Med. 2004;350(10):1005-1012",
"authors": "Celli BR, Cote CG, Marin JM, et al."
},
"quartile": 1,
"bmi_kg_m2": 24,
"max_score": 10,
"components": [
{
"value": 24,
"factor": "bmi",
"points": 0,
"present": false
},
{
"value": 70,
"factor": "fev1",
"points": 0,
"present": false
},
{
"value": 0,
"factor": "mmrc",
"points": 0,
"present": false
},
{
"value": 400,
"factor": "six_minute_walk",
"points": 0,
"present": false
}
],
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"six_minute_walk_m": 400,
"formula_expression": "BODE = bmi_points + fev1_points + mmrc_points + walk_points; BMI <=21 -> 1 else 0; FEV1% >=65 -> 0, 50-64 -> 1, 36-49 -> 2, <=35 -> 3; MMRC 0-1 -> 0, 2 -> 1, 3 -> 2, 4 -> 3; 6MWD m >=350 -> 0, 250-349 -> 1, 150-249 -> 2, <=149 -> 3; quartiles 0-2 / 3-4 / 5-6 / 7-10; max 10",
"fev1_percent_predicted": 70
}
]
}
}Tags
x402
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