Table 1 Spirometric Classification of COPD Severity.
From: Early detection of COPD in primary care -The Copenhagen COPD Screening Project
Based on Post-Bronchodilator FEV1 | |
|---|---|
Stage I: Mild | FEV1/FVC < 0,70 FEV1 ≥ 80% predicted |
Stage II: Moderate | FEV1/FVC < 0,70 50% ≤ FEV1 < 80% predicted |
Stage III: Severe | FEV1/FVC < 0,70 30% ≤ FEV1 < 50% predicted |
Stage IV: Very Severe | FEV1/FVC < 0,70 FEV1 < 30% predicted or FEV1 < 50% predicted plus chronic respiratory failure |