Risk factors for spinal cord injury without radiographic abnormality (SCIWORA) in trauma cases at a single trauma centre

Cervical injury due to blunt trauma requires emergency responses; however, few studies have investigated risk factors based on spinal cord injury without radiographic abnormality (SCIWORA). Therefore, this study determined the risk factors for cervical spinal cord injury with radiographic abnormality and SCIWORA. This study included 4,923 trauma cases transferred to a Japanese trauma center between 2007 and 2013. We analyzed risk factors for cervical spinal cord injury with radiographic abnormality, and SCIWORA using a logistic regression model. The co-efficient factors considered for this study were revised trauma score (RTS), age at arrival, cause of injury (traffic accident, ground-level fall, low- and high-level fall, or other injury). Significant independent risk factors of cervical spinal cord injury varied based on the presence or absence of radiographic abnormality. The risk factors for SCIWORA were male (odds ratio [OR]: 2.19, 95% confidence interval (CI): 1.21–3.95), age 65–79 years (OR: 1.71, CI: 1.06–2.78), RTS <7.8408 (OR: 4.98, CI: 2.42–10.26), injury severity scale (OR: 1.07, CI: 1.06–1.09), other injuries (OR: 2.64, CI: 1.11–6.30), low- and high-level fall (OR: 2.18, CI: 1.24–3.83), and ground-level fall (OR: 10.35, CI: 5.65–18.95). The risk factors for SCIWORA are male, age 65–79 years, and ground-level fall. Therefore, careful neurologic examination and MRI studies are necessary in the examination of these at-risk patients.