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Relative rate of change in FVC after treatments with anti-fibrotic agents (atypical IPF/typical IPF =22/20 cases) for 6 months. The rate of decrease in FVC value 6 months after treatment with anti-fibrotic agents was significantly higher in atypical IPF than those in typical IPF (−11.8%±14.0% vs. −1.0%±12.7%; P=0.01). FVC, forced vital capacity; IPF, idiopathic pulmonary fibrosis.
