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Chinese Journal of Digestion and Medical Imageology(Electronic Edition) ›› 2025, Vol. 15 ›› Issue (03): 229-234. doi: 10.3877/cma.j.issn.2095-2015.2025.03.008

• Original Articles • Previous Articles    

Risk prediction nomogram model establishing and clinical DCA analysis based on the risk factors of anastomotic fistula after esophageal cancer surgery

Qiuyan Wang1, Aimin Yang1, Chun Cheng1, Yang Zhou1,()   

  1. 1. Department of Thoracic Surgery, Nantong Cancer Hospital, Nantong 226011, China
  • Received:2025-01-03 Online:2025-06-01 Published:2025-06-25
  • Contact: Yang Zhou

Abstract:

Objective

To explore the risk factors of postoperative anastomotic fistula of esophageal cancer, establish a risk prediction nomogram model based on the risk factors, and evaluate the prediction efficiency and clinical application value of this model through clinical decision curve analysis(DCA).

Methods

A total of 342 patients undergoing esophageal cancer surgery in Nantong Cancer Hospital from January 2020 to September 2024 were retrospectively selected and divided into occurrence group (n=36) and non-occurrence group (n=306) according to whether postoperative anastomotic fistula was complicated.The differences in baseline data, perioperative relevant indicators and serological factors between the two groups were compared.Lasso and multivariate Logistic regression were used to screen the risk factors of postoperative anastomotic fistula for esophageal cancer, the risk prediction nomogram model was constructed, and the prediction accuracy was verified by receiver operating characteristic (ROC) curve.Bootstrap method and DCA decision curve were used for internal verification to verify the stability and benefits of the nomogram model.

Results

There were statistically significant differences in diabetes mellitus, smoking history, anastomosis mode, low density lipoprotein cholesterol (LDL-C) and albumin between the occurrence group and the non-occurrence group (all P<0.05).Lasso regression showed that diabetes mellitus, anastomotic mode and albumin could be included in the risk prediction model of anastomotic fistula after esophageal cancer surgery.Binary Logistic regression showed that diabetes mellitus, manual anastomosis and low albumin level were independent risk factors for anastomotic fistula after esophageal cancer surgery (all P<0.001).ROC results showed that the area under the curve predicted by diabetes, anastomotic mode, albumin and nomogram models was 0.713, 0.726, 0.787 and 0.904,respectively.The sensitivity was 0.583, 0.583, 0.735 and 0.889, respectively.The specificity was 0.843, 0.869,0.750 and 0.788, respectively.Internal verification was performed by Bootstrap method (B=1000), and C-indexwas 0.807, indicating that the early warning model of anastomotic fistula after esophageal cancer surgery had good stability.Decision analysis showed that the model can bring net benefits, which was obviously better than the ineffective strategy.

Conclusion

Diabetes mellitus, manual anastomosis and low albumin are independent risk factors for anastomotic fistula after esophageal cancer surgery.The established risk prediction model is effective, stable and has net benefit, which is better than the control without strategy.

Key words: Esophageal cancer, Anastomotic fistula, Influencing factors, Receiver operating characteristic curve, Nomogram, Predictive effectiveness

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