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Table 7 Staging the bronchial obstruction

From: The AIMAR recommendations for early diagnosis of chronic obstructive respiratory disease based on the WHO/GARD model*

Severity

FEV1/FVC after bronchodilatation

%predicted FEV1

MILD

< 70%

> = 80%

MODERATE

< 70%

50-80%

SEVERE

< 70%

30-50%

VERY SEVERE

< 70%

< 30%