Gold Spirometry

GOLD SPIROMETRIC CRITERIA FOR COPD SEVERITY1
I: Mild COPD
• FEV1/FVC < 0.7
• FEV1 ≥ 80% predicted
At this stage, the patient may not be aware that their lung function is abnormal.

II: Moderate COPD
• FEV1/FVC < 0.7
• 50% ≤ FEV1 < 80%
predicted Symptoms usually progress at this stage, with shortness of breath typically developing on exertion.

III: Severe COPD
• FEV1/FVC < 0.7
• 30% ≤ FEV1 < 50% predicted
Shortness of breath typically worsens at this stage and often limits patients’ daily activities. Exacerbations are especially seen beginning at this stage.

IV: Very Severe COPD
• FEV1/FVC < 0.7
• FEV1 < 30% predicted or FEV1 < 50% predicted plus chronic respiratory failure
At this stage, quality of life is very appreciably impaired and exacerbations may be life-threatening.

GOLD