(2)經胸腔或風濕免疫專科醫師確認符合慢性漸進性纖維化間質性肺病(Chronic fibrosing interstitial lung diseases with a progressive phenotype,PF-ILD)之疾病進展定義(請檢附過去一年內可證明疾病進展之病歷及相關檢查報告)。須符合肺功能惡化,且伴隨呼吸症狀惡化或HRCT肺部影響檢查有纖維化增加的證據。肺功能惡化可以為以下任一條件(a)用力肺活量(Forced vital capacity, FVC)預測值之絕對值降低≥5%或 (b) DLCO(Diffusing capacity of the lung for carbon monoxide)預測值之絕對值降低≥10%。