Study of the association between anemia and prognosis of moderate-to-severe traumatic brain injury

Abstract

Objective: To investigate the impact of admission anemia on the prognosis of patients with moderate- to-severe traumatic brain injury (TBI). Methods: The clinical data of patients with moderate-to-severe TBI treated in the Department of Intensive Care Unit in our hospital from January 2020 to September 2022 were retrospectively analyzed. The patients were divided into admission non-anemia group (Hb ≥ 100 g/L) and admission anemia group (Hb<100 g/L) based on hemoglobin (Hb) levels. The Glasgow Coma Scale (GCS) score, first blood analysis, arterial blood gas, blood pressure, injury mechanism, pupillary reflex at admission and others were compared, multivariate logistic was used to analyse independent risk factors for patient death. Results: One hundred and nine patients were included in the study, of which 17 died in the hospital and 52 had anemia at admission. Compared with patients in the admission non-anemia group, patients in the admission anemia group were younger, had lower admission GCS and trauma score (PTS) scores, higher mortality rates, and longer hospital stay (all P<0.05).Univariate analysis showed that moderate-to-severe TBI patients with admission anemia, admission hyperglycemia, GCS<8, PTS<8, abnormal pupillary reflex, and other organ injuries had higher mortality rates (all P<0.05) .Multivariate logistic regression analysis showed that admission anemia (OR=9.383, 95% CI=1.086~81.094, P=0.042), admission pupillary reflex abnormalities (OR=23.121,95% CI=3.680~145.270,P=0.001), and admission hyperglycemia (OR=15.181, 95% CI=2.019~114.160, P=0.008) are independent risk factors for death of Moderate-to-severe TBI patients. Conclusions: Admission anemia is an independent risk factor for death of moderate-to-severe TBI patients, and it can prolong the length of hospital stay for such patients.