Abstract:Abstract: Objective?To establish a preoperative evaluation model and evaluate the accuracy of postoperative cardiopulmonary complications by analyzing the risk factors of postoperative complications after VATS in elderly patients with lung cancer.?Methods?From January 2015 to January 2018, 476 patients underwent VATS were selected as subjects. Among them, 166 patients with postoperative cardiopulmonary complications were included as complications and 310 patients without cardiopulmonary complications served as a control group. Univariate analysis of the factors associated with complications, statistically significant indicators were included in the multivariate logistic regression model, and the risk factors for postoperative cardiopulmonary complications after VATS in elderly patients with lung cancer were analyzed. Based on the results of the regression analysis, a preoperative evaluation model was established. The Hosmer-Lemeshow test were used to evaluate the model prediction performance.?Results?Logistic regression analysis showed age (OR?=?1.337), Glu (OR?=?4.647), surgical size (OR?=?4.598) were risk factors for postoperative complications, Albumin (OR?=?0.660) was a protective factor for postoperative complications (P?