[Table/Fig-1]:
Classification of COPD according to GOLD criteria [1].
| GOLD stage |
GOLD stage |
Severity Symptoms | Spirometry |
|---|---|---|---|
| 0 | At risk | Sputum production | Normal |
| I | Mild | With or without chronic cough or sputum production | FEV1/FVC <0.7 and FEV1 80% predicted |
| II | Moderate | With or without chronic cough or sputum production | FEV1/FVC <0.7 and 50% FEV1<80% predicted |
| III | Severe | With or without chronic cough or sputum production | FEV1/FVC <0.7 and 30% FEV1<50% predicted |
| IV | Very severe | With or without chronic cough or sputum production | FEV1 <30% predicted or FEV1<50% predicted with respiratory failure or signs of right heart failure |