COPD GOLD STAGES

CLASSIFICATION OF SEVERITY OF COPD
GOLD Stages	Symptoms	FEV1 (% predicted)	*FEV1/FVC (%)
I: Mild	+/- Symptoms +/- Cough/sputum	> 80	< 70
II: Moderate	+/- Symptoms +/- Cough/sputum/dyspnea	50 - 80	< 70
III: Severe	+/- Symptoms +/- Cough/sputum/dyspnea	30 - 50	< 70
IV: Very Severe	Cough/sputum/dyspnea +/- Respiratory failure +/- Right heart failure	< 30 Or respiratory failure Or Right heart failure	< 70
*Note: FVC -- Forced vital capacity: the maximum volume of air that can be forcibly expelled from the lungs. FEV1 -- Forced expiratory volume in one second: the amount of air you can exhale during the first second after you take your deepest breath.