Abstract：Objective To analyze the influencing factors of malnutrition risk in breast cancer patients undergoing chemotherapy and
construct a nomogram model based on the analysis results. Method The relevant data of 231 breast cancer patients undergoing
chemotherapy in Affiliated Hospital of Yangzhou University were retrospectively analyzed, taking body mass index (BMI) <18.5 kg/m2
and nutritional risk screening 2002 (NRS 2002) score≥3 points as the criteria for judging malnutrition, they are divided into malnutrition
group (65 cases) and normal nutrition group (166 cases). The multivariate Logistic regression were used to analyze the influencing factors
of malnutrition risk in breast cancer patients undergoing chemotherapy, and a nomogram prediction model was constructed based on the
analysis results, then use the area under the receiver operating characteristic (ROC) curve and the H⁃L fit curve to evaluate the effectiveness
and discrimination of the model. Use the decision curve analysis (DCA) to evaluate the predictive value of the model. Result 65 patients
in this study developed malnutrition, accounting for 28.14%. There were significant differences in age, adjuvant radiotherapy, liver damage,
relative dose intensity of chemotherapy drugs, oral mucositis, gastrointestinal reactions (constipation and abdominal distension) between
the two groups (P<0.05). Multivariate Logistic regression analysis showed that age ≥60 years old, adjuvant radiotherapy, relative dose
intensity of chemotherapeutics of 85%-100%, and gastrointestinal reactions were independent risk factors for malnutrition in patients
undergoing chemotherapy after breast cancer surgery (P<0.05). According to the results of multivariate Logistic regression analysis, a
nomogram prediction model for malnutrition in patients undergoing chemotherapy after breast cancer surgery was constructed and
evaluated, the area under the ROC curve was 0.824, the sensitivity was 73.8%, and the specificity was 96.0%. The H⁃L fit curve results
showed that χ2=7.241, P=0.412. Conclusion Age≥60 years old, adjuvant radiotherapy, the relative dose intensity of chemotherapy drugs
of 85%-100% and gastrointestinal reactions were independent risk factors for malnutrition in patients undergoing chemotherapy after
breast cancer surgery. The constructed nomogram prediction model has good predictive value, and can be used as a tool to screen the risk
of malnutrition in patients undergoing chemotherapy after breast cancer surgery
张晶，夏艳，王兆锦，景丽，陆小云，林志娟. 乳腺癌术后化疗患者营养不良风险的列线图模型构建[J]. 肿瘤代谢与营养电子杂志, 2022, 9(2): 224-228.
Zhang Jing, Xia Yan, Wang Zhaojin, Jing Li, Lu Xiaoyun, Lin Zhijuan. Construction of a nomogram model of malnutrition risk in patients undergoing chemotherapy after breast cancer surgery. Electron J Metab Nutr Cancer, 2022, 9(2): 224-228.
