Fig. 4

The core IPF gene set robustly differentiated IPF patients from normal controls in three independent validation cohorts. Logistic regression models were trained on the core IPF gene sets using the training cohort with 2-fold cross-validation, and tested with each validation cohort. The decision threshold was set to provide at least 90% sensitivity for IPF discovery. ROC curves were shown in the left column, and classification scatter plots of IPF and control samples were shown in the right column