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SVM-RFE as well as logistic regression models are used for screening important clinical features. (A) Venn diagram showing six features associated with infection prediction. (B) PCA showing that based on these six characteristics, a better distinction can be made between infected and uninfected patients. (C–H) ROC curves showing the predictive performance of (C) age, (D) biological sex, (E) BMI, (F) hydromorphone concentration grouping, (G) WBC, and (H) CRP on infection.
