Classification of Copd by severit Stage l( moderate) lA:FEⅥ/FVC<70% 50%8 FEV1<80% predicted lg:FEⅥ/FVC<70% 30%8 FEV1 50% predicted With or without symptomClassification of COPD by Severity • Stage II( moderate) – IIA : FEV1/FVC < 70% 50% FEV1 < 80% predicted – IIB : FEV1/FVC < 70% 30% FEV1 < 50% predicted With or without symptom