Logistic Regression Analysis of the Mechanism of Blunt Brain Injury Inference Based on CT Images

Abstract

ObjectiveTo study the correlation between CT imaging features of acceleration and deceleration brain injury and injury degree.MethodsA total of 299 cases with acceleration and deceleration brain injury were collected and divided into acceleration brain injury group and deceleration brain injury group according to the injury mechanism. Subarachnoid hemorrhage （SAH） and Glasgow coma scale （GCS）, combined with skull fracture, epidural hematoma （EDH）, subdural hematoma （SDH） and brain contusion on the same and opposite sides of the stress point were selected as the screening indexes. χ2 test was used for primary screening, and binary logistic regression analysis was used for secondary screening. The indexes with the strongest correlation in acceleration and deceleration injury mechanism were selected.Resultsχ2 test showed that skull fracture and EDH on the same side of the stress point; EDH, SDH and brain contusion on the opposite of the stress point; SAH, GCS were correlated with acceleration and deceleration injury （P<0.05）. According to binary logistic regression analysis, the odds ratio （OR） of EDH on the same side of the stress point was 2.697, the OR of brain contusion on the opposite of the stress point was 0.043 and the OR of GCS was 0.238, suggesting there was statistically significant （P<0.05）.ConclusionEDH on the same side of the stress point, brain contusion on the opposite of the stress point and GCS can be used as key indicators to distinguish acceleration and deceleration injury mechanism. In addition, skull fracture on the same side of the stress point, EDH and SDH on the opposite of the stress point and SAH were relatively weak indicators in distinguishing acceleration and deceleration injury mechanism.

Keywords

• forensic medicine
• acceleration brain injury
• deceleration brain injury
• logistic regression
• computed tomography （ct）
• injury manners