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Fig. 4 | BMC Pulmonary Medicine

Fig. 4

From: Surfactant protein A as a biomarker of outcomes of anti-fibrotic drug therapy in patients with idiopathic pulmonary fibrosis

Fig. 4

Correlation between changes in (a) FVC and (b) DLco and changes in SP-A, SP-D, and KL-6. (a) Decline in FVC showed a correlation with decrease in serum SP-A and SP-D (r = − 0.46 and r = − 0.39, respectively, p < 0.01). (b) Decline in DLco showed a correlation with decrease in serum SP-A, SP-D, and KL-6 (r = − 0.67, r = − 0.54, and r = − 0.47 respectively, p < 0.01). Spearman’s correlation coefficients were used to analyze the linear relationship between the variables

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