GOLD Spirometric Grade — Post-Bronchodilator FEV1 % Predicted (requires FEV1/FVC < 0.70 confirmed)

GOLD 1 (Mild) — FEV1 ≥ 80% predicted+1GOLD 2 (Moderate) — FEV1 50–79% predicted+2GOLD 3 (Severe) — FEV1 30–49% predicted+3GOLD 4 (Very Severe) — FEV1 < 30% predicted+4

Symptom Burden — CAT or mMRC Score

Low symptoms: CAT < 10 OR mMRC 0–1 (less dyspnea, fewer symptom impacts)+0High symptoms: CAT ≥ 10 OR mMRC ≥ 2 (significant dyspnea and quality-of-life impairment)+0

Exacerbation History (past 12 months)

0–1 moderate exacerbation (not hospitalized) in past year — Low exacerbation risk+0≥ 2 moderate exacerbations OR ≥ 1 hospitalization for COPD in past year — High exacerbation risk (GOLD Group E)+0

GOLD Classification for COPD Severity

GOLD Classification for COPD Severity