Giá trị thang điểm P-POSSUM trong tiên lượng viêm phổi sau phẫu thuật ổ bụng tại Bệnh viện Bạch Mai

Abstract

Objective: To determine the incidence of postoperative pneumonia after abdominal surgery and to evaluate the predictive value of the P-POSSUM score for this complication. Subjects and methods: This prospective observational cohort study included 503 patients undergoing abdominal surgery at Bach Mai Hospital from December 2025 to March 2026. The primary outcome was postoperative pneumonia within 30 days. Predictive performance of the P-POSSUM score was assessed using the area under the receiver operating characteristic curve (AUROC), the Youden index-derived cut-off, and multivariable logistic regression. Results: The incidence of postoperative pneumonia was 8.5%. The P-POSSUM score showed good discriminatory ability, with an AUROC of 0.84 (95% CI: 0.76 – 0.90). The optimal cut-off was 34.5, yielding a sensitivity of 81% and a specificity of 77%. In multivariable analysis, a P-POSSUM score > 34.5 was independently associated with postoperative pneumonia (OR = 13.67; 95% CI: 6.10 – 30.64). Underweight status was also significantly associated with the outcome. Conclusion: The P-POSSUM score demonstrated good value for risk stratification of postoperative pneumonia after abdominal surgery and may support early identification of high-risk patients.