关键词: 肺肿瘤, Logistic回归分析, 决策树, 一级亲属, 筛查行为, 影响因素

Abstract: Background　Lung cancer is the leading cause of cancer death in China. Early screening of high-risk population is the most effective and key method to find lung cancer and improve prognosis. At present, there are few reports on the influencing factors of screening behavior of the first-degree relatives of lung cancer patients, a concentrated high-risk group. Objective　To analyze the influencing factors of early screening behavior of lung cancer in first-degree relatives of lung cancer patients by Logistic regression and decision tree model. Methods　310 first-degree relatives of lung cancer patients who were hospitalized in the Department of Respiratory Medicine and Thoracic Surgery of Shanxi Cancer Hospital from March to June, 2023 were selected as the subjects of investigation. General information questionnaire, lung cancer knowledge questionnaire and Chinese version of lung cancer screening health belief scale were used to investigate. Analyze the influencing factors of lung cancer screening behavior, establish Logistic regression model and decision tree model respectively, and compare the differences between the two models. Results　The rate of first-degree relatives of patients with lung cancer who had received lung cancer screening was 23.9% (74/310). The overall awareness rate of lung cancer knowledge was 75.2% (4 662/6 200). 56.5%(175/310) are willing to be screened for lung cancer. Logistic regression results showed age , medical insurance type , whether or not you have received advice on lung cancer screening, willingness to screen, perceived disorder, perceived benefit and perceived risk (P < 0.05). The results of decision tree model show that cognitive impairment and age are the influencing factors of lung cancer screening behavior of first-degree relatives. There was significant difference in the prediction efficiency between Logistic regression model and decision tree model (P < 0.05). Conclusion　First-degree relatives of patients with lung cancer have a high level of overall lung cancer awareness but a low level of awareness of screening methods. Their health beliefs and willingness to screen are at a medium level, and the screening rate of lung cancer is low. Medical staff can jointly apply the two models and take measures to make the first-degree relatives establish correct screening cognition and health belief in order to promote the screening behavior of the first-degree relatives.

Key words: Lung neoplasms, Logistic regression analysis, Decision tree, First-degree relatives, Screening behavior, Influencing factor