Ottawa COPD Risk Score

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Coronary artery bypass graft history

Intervention for PVD

Intubation for respiratory distress history

HR ≥ 110/min (on arrival to ED)

Too ill to do walk test after treatment in ED

Acute ischemic changes on EKG

Pulmonary congestion on CXR

Hb < 10 g/dL (100 g/L)

Urea ≥ 12 mmol/L (BUN ≥ 34 mg/dL)

Serum CO2 ≥ 35 mEq/L (35 mmol/L)

References

Emanuele Di Angelantonio. 2024 Revision of the level of evidence grading system for ESC clinical practice guideline recommendations II: diagnostic tests and prediction models.. European heart journal, 2025
M. Marathe. P253 Evaluation of the ottawa COPD risk scale (OCRS) at royal stoke university hospital (RSUH), UK in predicting adverse outcome in COPD exacerbation. Thorax, 2019
V. Bellou. Prognostic models for outcome prediction in patients with chronic obstructive pulmonary disease: systematic review and critical appraisal. The BMJ, 2019