Table 1.
GOLD | ATS/ERS | ||
---|---|---|---|
Establishing COPD FEV1/FVC |
Staging COPD FEV1 (%Pred)* |
Establishing COPD FEV1/FVC |
Staging COPD FEV1 (%Pred)* |
<0.70 | Mild: ≥80 | <ATS/ERS-LLN | Mild: ≥70 |
Moderate: 50–79 | Moderate: 60–69 Moderately severe: 50–59 |
||
Severe: 30–49 | Severe: 35–49 | ||
Very severe: <30 | Very Severe: <35 |
Abbreviations: COPD, Chronic Obstructive Pulmonary Disease; GOLD, Global Initiative for Obstructive Lung Disease; ATS/ERS, American Thoracic and European Respiratory Societies; FEV1/FVC, ratio of forced expiratory volume in 1 second (FEV1) to forced vital capacity (FVC); LLN, lower limit of normal; %Pred, percent predicted.
(measured / predicted) × 100