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Table 1 Gold Classification: Global Initiative for Obstructive Lung Disease

From: COPD exacerbations in general practice: variability in oral prednisolone courses

  Severity FEV1
Gold 1 Mild ≥ 80 predicted
Gold 2 Moderate 50-80% predicted
Gold 3 Severe 30-50% predicted
Gold 4 Very severe ≥ 30%, or < 50% predicted and with respiratory failure