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Table 2 IPF disease stage samples for CaNoPy

From: The care needs of patients with idiopathic pulmonary fibrosis and their carers (CaNoPy): results of a qualitative study

Disease extent Limited Extensive
Limited disease: forced vital capacity (FVC) greater than 50 % predicted and gas transfer (TLCO) greater than 40 % predicted Extensive disease: FVC less than 50 % or TLCO less than 40 % predicted
Disease behaviour Stable Progressive
Stable disease: a decline of less than 10 % in FVC or less than 15 % in TLCO in the previous 12 months Progressive disease: a decline in either FVC greater than 10 % or TLCO greater than 15 % during the previous 12 months