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Chinese Journal of Neurotraumatic Surgery(Electronic Edition) ›› 2023, Vol. 09 ›› Issue (01): 19-25. doi: 10.3877/cma.j.issn.2095-9141.2023.01.004

• Clinical Research • Previous Articles     Next Articles

Construction of a risk prediction model for post-traumatic subdural hygroma based on decision tree method

Hua Zhang1, Guangming Liu1, Guocheng Liu1, Shuhong Zhang1, Dali Chen1, Xiaolong Pu1, Zhiyou Wang1, Qian Li1,()   

  1. 1. Department of Critical Medicine, Chengdu Pidu District People's Hospital, Chengdu 617300, China
  • Received:2022-09-16 Online:2023-02-15 Published:2023-04-17
  • Contact: Qian Li

Abstract:

Objective

To investigate the influencing factors of post-traumatic subdural hygroma (PTSH) and to construct a decision tree risk prediction model for PTSH after traumatic brain injury (TBI) operation.

Methods

From June 2019 to June 2022, 344 patients with TBI who were admitted to Intensive Care Medicine Department of Pidu District People's Hospital of Chengdu were selected as the study objects. According to whether PTSH occurred, they were divided into observation group and control group. The clinical data of the two groups were analyzed. The influencing factors of PTSH development in TBI patients were screened by univariate and Logistic regression analysis. The decision tree prediction model of PTSH after TBI was constructed by SPSS Modeler software. The diagnostic efficacy of the decision tree prediction model was analyzed.

Results

Sixty-eight of 344 TBI patients developed PTSH after DC, with an incidence of 19.77%. The results of univariate and multivariate Logistic regression analysis showed that arachnoid tear, admission GCS score >8 points, midline shift, large bone flap, bone window area >150 cm2, distance from the edge of bone flap to the midline >2 cm were the influencing factors of PTSH in TBI patients after DC (P<0.05). Six explanatory variables were selected as nodes of the decision tree model, including arachnoid tear, admission GCS score >8 points, midline shift, large bone flap, bone window area >150 cm2, and distance from the edge of bone flap to the midline >2 cm, among which arachnoid tear is the most important predictor of the model. The ROC curve analysis showed that the area under curve (AUC) value of the decision tree model was 0.895, and the AUC value of the Logistic regression model was 0.881. The prediction efficiency of the decision tree model was better than that of the Logistic regression model (Z=2.423, P=0.013).

Conclusion

Arachnoid tear, admission GCS score >8 points, midline shift, large bone flap, bone window area >150 cm2, and the distance from the edge of bone flap to the midline >2 cm are the influential factors of PTSH in patients with TBI after DC. The decision tree model can help screen people at high risk of PTSH after DC, and guide clinical formulation of scientific prevention and treatment strategies. It has high clinical value.

Key words: Post-traumatic subdural hygroma, Traumatic brain injury, Risk factors, Decision tree, Prediction model

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