Fig. 4

Feature importance and Pearson correlation of M1 and M2. Figure A was the univariate importance of features in models M1 and M2. Clinical, PET, and CT features were represented by using blue, gray, and red bar, respectively. Figure B showed the overlapping between features selected for models M1 and M2. In Figure C, Pearson test was used for correlational statistical analysis. P-value < 0.05 indicated significant correlation identified between two variables (indicated with colored cells)