Gold Spirometric Grading Criteria for COPD Severity
| GOLD Stage | Severity | Spirometry |
|---|---|---|
| I | Mild | FEV1/FVC <0.7 and FEV1≥80% predicted |
| II | Moderate | FEV1/FVC <0.7 and FEV1≥50% but <80% predicted |
| III | Severe | FEV1/FVC <0.7 and FEV1≥30% but <50% predicted |
| IV | Very severe | FEV1/FVC <0.7 and FEV1<30% predicted |
Abbreviation: GOLD, Global Initiative for Lung Disease.
Source: From the Global Strategy for Diagnosis, Management and Prevention of COPD 2014. Available from http://www.goldcopd.org; with permission.