Abstract:Objective To explore the value of prognostic nutritional index in patients with acute pulmonary embolism.Methods The clinical data of 206 patients with acute pulmonary embolism who were treated in southwest medical university affiliated hospital from August 2013 to August 2019 were retrospectively collected. The patients were divided into death group and survival group according to their prognosis. Calculation of PNI.X2 test and t test were used to compare the differences between the two groups, and multivariate logistic regression analysis and receiver operating characteristic (ROC) curve were used to evaluate the prognostic value of PNI in patients with APE.Results There were significant differences in age, lymphocyte number, RBC number, hemoglobin, albumin, and prealbumin between the two groups (P < 0.05). PNI [O^R = 1.246, (95% CI: 1.050, 1.478) ] and prealbumin [O^R =1.009, (95% CI: 1.002, 1.016) ] were the predictors of prognosis in patients with acute pulmonary embolism. The sensitivity and specificity of PNI were 87.34% (95% CI: 0.808, 0.938) and 66.67% (95% CI: 0.602, 0.731), and the sensitivity and specificity of prealbumin were 63.92% (95% CI: 0.566, 0.712) and 83.33% (95% CI: 0.760, 0.906).Conclusion PNI is a new independent prognostic factor for patients with acute pulmonary embolism.