GOLD staging
used in COPDFEV1 >80% of predicted = mildFEV1 50-80% is moderateFEV1 30-50% is severe and <30% is very severe
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GOLD staging
used in COPDFEV1 >80% of predicted = mildFEV1 50-80% is moderateFEV1 30-50% is severe and <30% is very severe