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Table 1 Severity criteria of COPD

From: Health-related quality of life is related to COPD disease severity

Global Initiative for Chronic Obstructive Lung Disease, GOLD [3]: FEV1/FVC < 70%

I:

Mild COPD

FEV1 ≥ 80% predicted

II:

Moderate COPD

FEV1 50- < 80% predicted

III:

Severe COPD

FEV1 30- < 50% predicted

IV:

Very severe COPD

FEV1 < 30% predicted

British Thoracic Society, BTS [2]: FEV 1 /VC < 70% and FEV 1 < 80% predicted

I:

Mild COPD

FEV1 60- < 80% predicted

II:

Moderate COPD

FEV1 40-59% predicted

III:

Severe COPD

FEV1 < 40% predicted

  1. A group labelled BTS stage 0 was created for subjects with FEV1 ≥ 80% predicted: i.e. identical with mild COPD according to the GOLD criteria.
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Health and Quality of Life Outcomes

ISSN: 1477-7525

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