Fig. 3

CCL8 protein concentrations in BAL fluids and ROC curves. a CCL8 protein was detected in 25 of 41 normal controls, 80 of 86 IPF patients, 11 of 22 NSIP patients, 8 of 20 HP patients and 13 of 19 sarcoidosis patients. Open and closed circles indicate CCL8 protein levels detected (>1.5pg/mL) and those below the lower limit of detection, respectively. The data were presented as median values with 25 and 75% quartiles. b ROC curve of the CCL8 protein concentration between the two groups. A cut-off value of 2.17pg/mL had 80.2% accuracy, 86.0% specificity, and 65.7% sensitivity for differentiating IPF patients from controls. c ROC curve of the CCL8 protein concentration between the other interstitial lung diseases groups. A cut-off value 0.53pg/mL had 70.7% accuracy, 91.9% specificity, 57.4% sensitivity between the IPF patients and the other interstitial lung diseases group. d A Kaplan-Meier plot of 69 subjects with IPF followed up for 1to 8 years. The percent survival rate was markedly lower in the group with a CCL8 level of >28.61 pg/mL (red line) compared with that in the group with a CCL8 level of <28.61 pg/mL (black line) (hazard ratio = 3.93, CI: 1.25–12.39, p = 0.012)