Abstract:Objective To investigate the risk factors for disseminated intravascular coagulation (DIC) and 28-day mortality in sepsis patients admitted to the intensive care unit (ICU).Methods Clinical data of 271 sepsis patients admitted to the ICU of Liaocheng People’s Hospital from January 2023 to December 2024 were retrospectively analyzed. Among them, 103 patients (38.01%) developed DIC. These DIC patients were divided into survival (n = 58) and death (n = 45) groups based on 28-day outcomes. Demographic data and laboratory indicators (APACHE II score, D-dimer [D-D], thrombomodulin [TM], lactate [Lac], platelet count [PLT], and soluble platelet endothelial cell adhesion molecule-1 [sPECAM-1] ) were compared. Multivariate stepwise logistic regression was used to identify risk factors for 28-day mortality. Receiver operating characteristic (ROC) curves evaluated the predictive value of these indicators.Results The survival group had significantly lower APACHE II scores, D-D, TM, Lac, and sPECAM-1 levels, but higher PLT levels than the death group (P < 0.05). Elevated APACHE II score (O^R = 1.492, 95% CI: 1.067, 2.086), D-D (O^R = 1.956, 95% CI: 1.225, 3.123), TM (O^R = 2.031, 95% CI: 1.316, 3.134), Lac (O^R = 2.274, 95% CI: 1.492, 3.466), PLT (O^R = 1.765, 95% CI: 1.059, 2.942), and sPECAM-1 (O^R = 1.826, 95% CI: 1.166, 2.866) were independent risk factors for 28-day mortality (P < 0.05). ROC analysis showed sensitivities of 75.9% (APACHE II), 89.7% (D-D), 79.3% (TM), 72.4% (Lac), 75.9% (PLT), and 82.8% (sPECAM-1), with specificities of 71.6%, 82.4%, 94.6%, 94.6%, 68.9%, and 77.0%, respectively.Conclusion APACHE II score, D-D, TM, Lac, PLT, and sPECAM-1 are significant risk factors for 28-day mortality in sepsis patients with DIC.