Fig. 1From: Serum surfactant protein D as a predictive biomarker for the efficacy of pirfenidone in patients with idiopathic pulmonary fibrosis: a post-hoc analysis of the phase 3 trial in JapanDistribution and median of serum concentration of a SP-D, b SP-A and c KL-6 at baseline in patients with IPF in the phase 3 trial of pirfenidone in Japan. No numerical difference in the distribution was observed between the pirfenidone and placebo groups for each biomarkerBack to article page