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| Research on grouping hospitalization expenses of patients with choledocholithiasis based on decision tree |
| Yin Yuhua1， Wu Huatun2，Zhu Jianqian2 |
1 Chengbei Quality Management Department, Affiliated Hangzhou First People′s Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China;
2 Hubin Quality Management Department, Affiliated Hangzhou First People′s Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
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Abstract Objective To study the case mix mode and cost payment standard of patients with common bile duct stones, so as to provide a reference for medical institutions to formulate correct hospitalization expenses grouping and improve medical efficiency. Methods The data came from the home page information of 3 990 patients with common bile duct stones diagnosed and treated in a large tertiary general hospital in Zhejiang Province from 2017 to 2020. After the relevant indicators were selected, multiple stepwise regression analysis was used to analyze the influencing factors of hospitalization expenses. The selected influencing factors were incorporated into the decision tree model, and the decision tree E-CHAID method was used to construct the hospitalization expense grouping plan and payment standard for choledocholithiasis. Results The number of days of hospitalization, surgery, and age were the classification nodes of the decision tree. The decision tree was divided into 8 groups. The coefficient of variation -CV- within each group was less than 0.4. The reduction of inter-variance was 0.67. The intra-group homogeneity and inter-group heterogeneity were good. Conclusion Using the decision tree E-CHAID method to group common bile duct stone cases into hospitalization expenses is scientific and reasonable. Medical institutions in various regions can verify the grouping based on local data and optimize the grouping plan.
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Received: 10 May 2021
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