Home    中文  
 
  • Search
  • lucene Search
  • Citation
  • Fig/Tab
  • Adv Search
Just Accepted  |  Current Issue  |  Archive  |  Featured Articles  |  Most Read  |  Most Download  |  Most Cited

Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition) ›› 2025, Vol. 19 ›› Issue (06): 368-377. doi: 10.3877/cma.j.issn.1674-1358.2025.06.007

• Research Article • Previous Articles    

Construction and verification of machine learning prediction model for risk of multiple drug-resistant bacterial infection in patients with severe burn

Donghui Li()   

  1. SICU Shijingshan Campus, Beijing Chao-yang Hospital, Capital Medical University, Beijing 100020, China
  • Received:2024-12-24 Online:2025-12-15 Published:2026-02-12
  • Contact: Donghui Li

Abstract:

Objective

To construct and validate a prediction model of multidrug-resistant organism (MDRO) infection risk in severe burned patients based on machine learning algorithm.

Methods

Clinical data of 675 patients with severe burn treated in Beijing Chao-yang Hospital, Capital Medical University from May 2017 to June 2024 were collected. Patients were divided into non-MDRO infection group (535 cases) and MDRO infection group (140 cases) based on whether MDRO infection occurred. The variable factors for MDRO infection were screened by the least absolute shrinkage and selection operator (LASSO). All the sample sizes were randomly divided into the training set (473 cases) and verification set (202 cases) according to the ratio of 7∶3, and the extreme Gradient Boost tree (XGBoost), Logistic regression, support vector machine (SVM), K-nearest neighbor (KNN) and Gauss Naive Bayes classification (GNB) prediction model were constructed, respectively. The performance of each model was evaluated by area under the receiver operating characteristic (ROC) curve (AUC), decision curve analysis (DCA) and calibration curve. The influence of each variable factor on the prediction model was analyzed using Shapley additive interpretation (SHAP).

Results

Among the 675 patients, 140 cases developed MDRO infection, with an incidence of 20.74% (140/675). The burn depth (χ2=32.244, P<0.001), burn area (χ2=9.438, P=0.002), hypoalbuminemia (χ2=4.713, P=0.030), usage of antibacterial drugs before intensive care unit (ICU) admission (χ2=11.073, P=0.001), mechanical ventilation (χ2=4.125, P=0.042), usage of≥3 antibacterial drugs (χ2=22.031, P<0.001), duration of antibiotic use≥7 days (χ2=10.377, P=0.001), indwelling catheter (χ2=13.519, P<0.001), deep vein catheterization (χ2=11.743, P<0.001), duration of ICU stay (Z=21.359, P<0.001) and duration of hospitalization (Z=11.271, P<0.001) between patients in non-MDRO infection group and MDRO infection group were all with significant differences. Five prediction models were constructed based on LASSO regression screening variable factors of MDRO infection, among which the GNB model had the best overall performance, with the AUC of 0.877 (95%CI: 0.837-0.917) for the training set and 0.872 (95%CI: 0.809-0.934) for the validation set, and the calibration curve showed that the model’s predicted probability was closest to the actual results, and the DCA curve showed that when the risk probability value was between 0.10-1.00, the clinical net benefit was high. SHAP analysis showed that the factors affecting the occurrence of MDRO infection in severe burned patients, ranked by importance, were as follows: duration of ICU stay, duration of hospitalization, depth of burn, duration of antibiotic use≥7 days, indwelling urinary catheter, deep vein catheterization and use of antibiotics before ICU admission.

Conclusions

The GNB model based on burn depth, duration of antibiotic use≥7 days, indentation catheter, deep vein catheterization, use of antibacterial drugs before admission to ICU, duration of stay in ICU and duration of hospitalization are the best prediction models for MDRO infection in patients with severe burns, which has some guiding significance for clinicians to develop effective prevention and control strategies.

Key words: Severe burn, Multidrug-resistant bacterial infections, Machine learning algorithm, Prediction model

京ICP 备07035254号-20
Copyright © Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition), All Rights Reserved.
Tel: 010-85322058 E-mail: editordt@163.com
Powered by Beijing Magtech Co. Ltd