{"uid":"cap_g1yfqPSRVzCtTeJSOXur4","slug":"ottawa-copd-risk-scale-calculator-stiell-2014-b67520fa","name":"Ottawa COPD Risk Scale Calculator (Stiell 2014)","description":"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.","url":"https://api.magentlab.com/api/calc/ottawa_copd","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["cabg","pvd_intervention","intubation_respiratory","hr_arrival_ge_110","too_ill_to_walk","ischemic_ecg","pulmonary_congestion","hemoglobin_lt_100","urea_ge_12","serum_co2_ge_35"],"properties":{"cabg":{"type":"boolean","description":"Prior coronary artery bypass graft as assigned by the caller (Stiell 2014; 1 point if true). true or false."},"urea_ge_12":{"type":"boolean","description":"Urea >=12 mmol/L as assigned by the caller after applying the Stiell 2014 cutoff (1 point if true). true or false. magent does not assay urea."},"ischemic_ecg":{"type":"boolean","description":"Acute ischemic changes on ECG as assigned by the caller (Stiell 2014; 2 points if true). true or false. magent does not interpret the ECG."},"serum_co2_ge_35":{"type":"boolean","description":"Serum CO2 >=35 mmol/L as assigned by the caller after applying the Stiell 2014 cutoff (1 point if true). true or false. magent does not assay CO2."},"too_ill_to_walk":{"type":"boolean","description":"Too ill to do the walk test after ED treatment, or heart rate >=120/min with SaO2 <90%, as assigned by the caller (Stiell 2014; one 2-point item, not two). true or false. magent does not walk the patient."},"pvd_intervention":{"type":"boolean","description":"Peripheral vascular disease intervention as assigned by the caller (Stiell 2014; 1 point if true). true or false."},"hemoglobin_lt_100":{"type":"boolean","description":"Hemoglobin <100 g/L as assigned by the caller after applying the Stiell 2014 cutoff (3 points if true). true or false. magent does not assay hemoglobin."},"hr_arrival_ge_110":{"type":"boolean","description":"Heart rate on ED arrival >=110/min as assigned by the caller after applying the Stiell 2014 cutoff (2 points if true). true or false. magent does not measure heart rate."},"pulmonary_congestion":{"type":"boolean","description":"Pulmonary congestion on chest radiograph as assigned by the caller (Stiell 2014; 1 point if true). true or false. magent does not read the chest radiograph."},"intubation_respiratory":{"type":"boolean","description":"Intubation for respiratory distress as assigned by the caller (Stiell 2014; 2 points if true). true or false."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"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%"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ibg7qVhb0owIS23yF4ift","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Calculate the Ottawa COPD Risk Scale (Stiell 2014) for this patient: no prior CABG, no PVD intervention, no prior intubation, heart rate on arrival was 95 so HR>=110 is false, too ill to walk is true, no ischemic ECG changes, no pulmonary congestion on CXR, hemoglobin is 110 so Hb<100 is false, urea is 14 so urea>=12 is true, and serum CO2 is 32 so CO2>=35 is false — what's the score and risk band?","exampleUseCases":[{"title":"ED triage risk stratification for COPD exacerbation","prompt":"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."},{"title":"Clinical documentation support for hospitalist handoff","prompt":"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?"},{"title":"Retrospective audit of COPD risk scores","prompt":"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?"}],"resultDescription":"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.","failureModes":["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)"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:19:15.841Z","isFirstParty":false}