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Table 1 Classification of airflow obstruction severity according to GOLD

From: Prediction of gold stage in patients hospitalized with COPD exacerbations using blood neutrophils and demographic parameters as risk factors

In patients with FEV1/FVC < 0.70

GOLD 1

Mild

FEV1%pred ≥ 80

GOLD 2

Moderate

50 ≤ FEV1%pred < 80

GOLD 3

Severe

30 ≤ FEV1%pred < 50

GOLD 4

Very severe

FEV1%pred < 30

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BMC Pulmonary Medicine

ISSN: 1471-2466

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