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Exploratory pooled analysis (studies 004 and 006 combined) of a) categorical forced vital capacity change at week 72 and b) 6-min walk test distance decrement >50 m (p = 0.03 Cochran–-Haenszel row mean score test based on five categories) [28, 31]. ▒: pirfenidone 2,403 mg·day−1 (n = 345); ░: placebo (n = 347). *: p<0.05; #: p = 0.003; ¶: p≤0.001.
