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Systemic immune-inflammation (SII) index predicts the prognosis of traumatic brain injury.
World Neurosurgery 2023 October 20
OBJECTIVE: Systemic inflammation following traumatic brain injury (TBI) has been extensively studied over the past decades, as it contributes significantly to the pathophysiological injury mechanisms and subsequent poor outcomes. Systemic immune-inflammation (SII) index is a novel biomarker of systemic inflammatory response. However, its predictive value regarding TBI prognosis in clinical practice remains insufficiently investigated.
METHODS: A total of 102 TBI patients admitted to Nanjing Drum Tower Hospital from July 2019 to February 2022 were enrolled. We employed various statistical analyses to evaluate the correlation between inflammatory indicators upon admission and patient prognosis, compared the predictive accuracy of these indicators, and generated ROC analysis to test their prognostic performance.
RESULTS: The SII index, platelet count (PLT), absolute lymphocyte count (ALC), and neutrophil/lymphocyte ratio (NLR) were capable of distinguishing TBI prognosis according to univariate logistic regression models (P<0.05). Multivariate logistic regression models revealed that increased SII index, PLT, and NLR upon admission were independent predictors of poor TBI prognosis (P<0.05). ROC analysis further demonstrated that the SII index (AUC=0.845, 95% CI 0.769-0.921, P=0.000) exhibited higher predictive ability than the NLR (AUC=0.694, 95% CI 0.591-0.796, P=0.001).
CONCLUSIONS: Our findings suggested that increased SII index during the early stages of TBI was an independent risk factor for poor prognosis with satisfactory predictive value. The SII index provides a reliable, convenient, and cost-effective prognostic model to evaluate systemic inflammation after TBI and identify patients at risk of poor outcomes, thereby offering valuable guidance for clinical practice.
METHODS: A total of 102 TBI patients admitted to Nanjing Drum Tower Hospital from July 2019 to February 2022 were enrolled. We employed various statistical analyses to evaluate the correlation between inflammatory indicators upon admission and patient prognosis, compared the predictive accuracy of these indicators, and generated ROC analysis to test their prognostic performance.
RESULTS: The SII index, platelet count (PLT), absolute lymphocyte count (ALC), and neutrophil/lymphocyte ratio (NLR) were capable of distinguishing TBI prognosis according to univariate logistic regression models (P<0.05). Multivariate logistic regression models revealed that increased SII index, PLT, and NLR upon admission were independent predictors of poor TBI prognosis (P<0.05). ROC analysis further demonstrated that the SII index (AUC=0.845, 95% CI 0.769-0.921, P=0.000) exhibited higher predictive ability than the NLR (AUC=0.694, 95% CI 0.591-0.796, P=0.001).
CONCLUSIONS: Our findings suggested that increased SII index during the early stages of TBI was an independent risk factor for poor prognosis with satisfactory predictive value. The SII index provides a reliable, convenient, and cost-effective prognostic model to evaluate systemic inflammation after TBI and identify patients at risk of poor outcomes, thereby offering valuable guidance for clinical practice.
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