Inflammation-lipid metabolism biomarker-based machine learning models for predicting postoperative pulmonary metastasis in colorectal cancer

Figure 4 Precision-recall curves for the four-layer models. A: Layer 1 precision-recall curves (demographics); B: Layer 2 precision-recall curves (demographics + inflammation); C: Layer 3 precision-recall curves (demographics + lipid); D: Layer 4 precision-recall curves (all features). PPV: Positive predictive value; RotF: Rotation Forest; GBDT: Gradient Boosting Decision Tree; MLP: Multi-Layer Perceptron; RF: Random Forest; KNN: K-Nearest Neighbors; GAM: Generalized Additive Model; SVM: Support Vector Machine; DT: Decision Tree; LR: Logistic regression; NB: Naive Bayes.