Fig. 4

Receiver operating characteristic curve of (A) Model 1 and (B) Model 2 in training cohort, and (C) Model 1 and (D) Model 2 in validation cohort. Calibration plots with the observed probability of grade ≥ 2 CIP by predicted probability of (E) Model 1, and calibration plots with the observed probability of grade ≥ 3 CIP by predicted probability of (F) Model 2. The DCA curve of (G) Model 1 and (H) Model 2 in training cohort. Abbreviations: GGO: ground-glass opacity; GGO_cat: extent of ground-glass opacity in categorical variable; RLL: right lower lobe