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Ottawa COPD Risk Scale Calculator (Stiell 2014)
x402
Ottawa COPD Risk Scale Calculator (Stiell 2014) 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 Ottawa COPD Risk Scale score from ten caller-assigned clinical flags and returns a risk band (low/medium/high/very high) with corresponding SAE percentages.
Price / call$0.005
Success—
StatusUnknown
How this service works
Ottawa COPD Risk Scale (Stiell 2014 derivation). Ten caller-assigned flags: CABG 1, PVD intervention 1, intubation 2, arrival HR >=110 2, too ill to walk or HR >=120 (SaO2 <90%) 2, ischemic ECG 2, CXR congestion 1, Hb <100 g/L 3, urea >=12 1, serum CO2 >=35 1; max 16. Bands low/medium/high/very high with Table 8 SAE percents when published. Not a medical device or admission order; not BAP-65 or DECAF; not the 2018 validation as formula. magent does not walk the patient or read the ECG or CXR.
Output
Returns the numeric Ottawa COPD Risk Score (0–16), the risk band classification (low, medium, high, or very high), and the corresponding Table 8 SAE percentage from the Stiell 2014 derivation study. Does not provide admission orders or device-grade clinical decisions.
Example use cases
ED triage risk stratification for COPD exacerbation
“I have a COPD patient in the ED — prior CABG yes, no PVD intervention, no prior intubation, arrival HR was 115 so HR>=110 true, not too ill to walk, no ischemic ECG, CXR shows congestion, hemoglobin is 88 g/L so Hb<100 true, urea is 10 so urea>=12 false, serum CO2 is 37 so CO2>=35 true — run the Ottawa COPD score and tell me the risk band.”
Clinical documentation support for hospitalist handoff
“For our handoff note, compute the Ottawa COPD Risk Scale on this patient: no CABG, no PVD intervention, intubation history true, HR at arrival was 100 so HR>=110 false, too ill to walk true, ischemic ECG changes false, no CXR congestion, hemoglobin 95 g/L so Hb<100 true, urea 13 mmol/L so urea>=12 true, serum CO2 28 so CO2>=35 false — what's the total score and corresponding SAE risk percentage?”
Retrospective audit of COPD risk scores
“For a quality audit case: CABG false, PVD intervention false, intubation false, HR>=110 at arrival false, too ill to walk false, ischemic ECG false, pulmonary congestion false, hemoglobin 120 so Hb<100 false, urea 8 so urea>=12 false, serum CO2 30 so CO2>=35 false — what does the Ottawa COPD scale return for this low-acuity presentation?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/ottawa_copdWhen to prefer
Use this endpoint when you need to compute the Ottawa COPD Risk Scale specifically per the Stiell 2014 derivation — not BAP-65, not DECAF, and not the 2018 validation formula. Ideal when all ten clinical flags have already been assessed by a clinician and you need the arithmetic scoring and risk-band lookup done programmatically.
Side effects
- Missing required boolean query parameter returns validation error
- Non-boolean value passed to a flag field causes schema rejection
- Network timeout on rare high-latency calls
- Score returned without clinical context may be misapplied if caller-assigned flags are inaccurate (garbage-in)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/ottawa_copd",
"count": 2,
"items": [
{
"score": 0,
"formula": "ottawa_copd",
"citation": {
"id": "stiell-2014",
"doi": "10.1503/cmaj.130968",
"pmid": "24549463",
"title": "Clinical characteristics associated with adverse events in patients with exacerbation of chronic obstructive pulmonary disease: a prospective cohort study",
"source": "CMAJ. 2014;186(6):E193-E204",
"authors": "Stiell IG, Clement CM, Aaron SD, Rowe BH, Perry JJ, Brison RJ, Calder LA, Lang E, Borgundvaag B, Forster AJ, Wells GA"
},
"max_score": 16,
"components": [
{
"factor": "cabg",
"points": 0,
"present": false
},
{
"factor": "pvd_intervention",
"points": 0,
"present": false
},
{
"factor": "intubation_respiratory",
"points": 0,
"present": false
},
{
"factor": "hr_arrival_ge_110",
"points": 0,
"present": false
},
{
"factor": "too_ill_to_walk",
"points": 0,
"present": false
},
{
"factor": "ischemic_ecg",
"points": 0,
"present": false
},
{
"factor": "pulmonary_congestion",
"points": 0,
"present": false
},
{
"factor": "hemoglobin_lt_100",
"points": 0,
"present": false
},
{
"factor": "urea_ge_12",
"points": 0,
"present": false
},
{
"factor": "serum_co2_ge_35",
"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.",
"sae_percent": 2.2,
"ottawa_copd_band": "low",
"formula_expression": "ottawa_copd = cabg(1) + pvd_intervention(1) + intubation_respiratory(2) + hr_arrival_ge_110(2) + too_ill_to_walk(2) + ischemic_ecg(2) + pulmonary_congestion(1) + hemoglobin_lt_100(3) + urea_ge_12(1) + serum_co2_ge_35(1); Stiell 2014 derivation Tables 6-8; max 16; SAE 2.2% (score 0) to 91.4% (score 10); score 9 and >10 SAE not published; admission thresholds of total score 1, 2, or 3 had sensitivities 91.2 / 80.9 / 60.3%"
},
{
"score": 0,
"formula": "ottawa_copd",
"citation": {
"id": "stiell-2014",
"doi": "10.1503/cmaj.130968",
"pmid": "24549463",
"title": "Clinical characteristics associated with adverse events in patients with exacerbation of chronic obstructive pulmonary disease: a prospective cohort study",
"source": "CMAJ. 2014;186(6):E193-E204",
"authors": "Stiell IG, Clement CM, Aaron SD, Rowe BH, Perry JJ, Brison RJ, Calder LA, Lang E, Borgundvaag B, Forster AJ, Wells GA"
},
"max_score": 16,
"components": [
{
"factor": "cabg",
"points": 0,
"present": false
},
{
"factor": "pvd_intervention",
"points": 0,
"present": false
},
{
"factor": "intubation_respiratory",
"points": 0,
"present": false
},
{
"factor": "hr_arrival_ge_110",
"points": 0,
"present": false
},
{
"factor": "too_ill_to_walk",
"points": 0,
"present": false
},
{
"factor": "ischemic_ecg",
"points": 0,
"present": false
},
{
"factor": "pulmonary_congestion",
"points": 0,
"present": false
},
{
"factor": "hemoglobin_lt_100",
"points": 0,
"present": false
},
{
"factor": "urea_ge_12",
"points": 0,
"present": false
},
{
"factor": "serum_co2_ge_35",
"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.",
"sae_percent": 2.2,
"ottawa_copd_band": "low",
"formula_expression": "ottawa_copd = cabg(1) + pvd_intervention(1) + intubation_respiratory(2) + hr_arrival_ge_110(2) + too_ill_to_walk(2) + ischemic_ecg(2) + pulmonary_congestion(1) + hemoglobin_lt_100(3) + urea_ge_12(1) + serum_co2_ge_35(1); Stiell 2014 derivation Tables 6-8; max 16; SAE 2.2% (score 0) to 91.4% (score 10); score 9 and >10 SAE not published; admission thresholds of total score 1, 2, or 3 had sensitivities 91.2 / 80.9 / 60.3%"
}
]
}
}Tags
x402
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