Abstract:Objective To investigate the correlation of neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and lymphocyte-to-monocyte ratio (LMR) with the prognosis of patients with primary brainstem hemorrhage (PBH), and to provide new indicators for clinical prognostic evaluation. Methods A retrospective analysis was conducted on the clinical data of 177 PBH patients admitted to the Second People's Hospital of Guiyang from January 2022 to December 2024, including demographic characteristics, hematological parameters, imaging findings, treatment modalities, and 3-month follow-up outcomes. NLR, PLR, and LMR were calculated, and prognosis was assessed using the Glasgow Outcome Scale (GOS), with patients categorized into good prognosis (GOS 4-5) and poor prognosis (GOS 1-3) groups. Univariate analysis and multivariate logistic regression were performed to explore the association between inflammatory markers and prognosis. Results Among the 177 patients, 83 (46.9%) had a good prognosis, and 94 (53.1%) had a poor prognosis. Univariate analysis revealed that admission Glasgow Coma Scale (GCS) score, hematoma volume, treatment modality, NLR, PLR, and LMR were significantly associated with poor prognosis (P<0.05). Multivariate logistic regression analysis identified NLR as an independent risk factor for poor prognosis in PBH (OR=14.724, 95%CI: 5.164-41.981, P<0.001), while admission GCS score (OR=0.688, 95%CI: 0.605-0.782, P<0.001) and robot-assisted surgery (OR=0.007, 95%CI: 0.001-0.094, P<0.001) were protective factors. PLR and LMR showed no independent prognostic value in multivariate analysis. Conclusion ?NLR is closely associated with PBH prognosis and serves as an independent risk factor for poor outcomes, making it a potential new indicator for clinical prognostic evaluation. Although PLR and LMR were associated with prognosis in univariate analysis, they were not confirmed as independent predictors in multivariate analysis. Robot-assisted surgery may improve prognosis by reducing inflammatory responses, warranting further investigation.