Systemic inflammation response index (SIRI) on the 3rd postoperative day are associated with severe pneumonia in cerebral hemorrhage patients: A single-center retrospective study

Inflammatory response was involved in the progression of cerebral hemorrhage. We sought to explore the associations of easily obtained inflammatory indicators including blood cell counts and the ratios of different blood cells counts with pneumonia and severe pneumonia in cerebral hemorrhage patients. We carried 1 retrospective study including 200 patients with cerebral hemorrhage and surgeries. The associations of neutrophils, lymphocytes, monocytes, platelets, systemic immune inflammation index (SII), systemic inflammation response index (SIRI), neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) with pneumonia and severe pneumonia in cerebral hemorrhage patients were estimated by univariate analysis and multivariate logistic regression model. Among the 200 patients included, there were a total of 163 (81.5%) had pneumonia after surgeries. Among 163 cerebral hemorrhage patients with pneumonia, 60 (36.8%) cases were evaluated as severe pneumonia. The level of SIRI on the 1st postoperative day in patients with severe pneumonia was higher than non-severe pneumonia (10.89 +/- 12.10 x 109/L vs 7.14 +/- 9.76 x 109/L, P = .003). The level of SIRI on the 3rd postoperative day in patients with severe pneumonia was more significantly higher (7.98 +/- 7.46 x 109/L vs 4.10 +/- 3.74 x 109/L, P < .001). The results of multivariate analysis showed that SIRI level on the 3rd postoperative day (>6.5 x 109/L) was associated with severe pneumonia in cerebral hemorrhage patients (OR: 4.409, 95% CI: 1.799-10.806, P = .001). SIRI was possibly a superior predictor for severe pneumonia in cerebral hemorrhage patients compared with other inflammatory indicators. On the one hand, we intend to validate the cutoff value of SIRI for predicting severe pneumonia in larger samples and multicenter studies. On the other hand, we also intend to use this index to guide the choice of antibacterial drugs in order to better benefit patients.