Fig. 3From: Serum SP-A and KL-6 levels can predict the improvement and deterioration of patients with interstitial pneumonia with autoimmune featuresCorrelation between serum SP-A and KL-6 concentrations and pulmonary function test parameters in IPAF patients using Spearman correlation test. SP-A, surfactant protein-A; KL-6, Krebs von den Lungen-6; DLCO, diffusing capacity for carbon monoxide; FVC, forced vital capacity; FEV1, forced expiratory volume in 1 sBack to article page