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. Author manuscript; available in PMC: 2017 Nov 17.
Published in final edited form as: J Emerg Med. 2014 Jan 10;46(4):582–587. doi: 10.1016/j.jemermed.2013.08.129

Table 3.

Imaging, Ionizing Radiation Exposure, Cost, and Head CT Abnormalities Among All Subjects, Those Diagnosed with Moderate to Severe TBI, and Those with a History of Seizure Disorders

Characteristic All Subjects n = 51 History of TBI n = 20 History of Seizure Disorder n = 33
CT, median (IQR)       5 (2–10)     12 (4.25–17.5)        6 (2.5–13.5)
X-ray, median (IQR)     20 (10–34)  20.5 (15.5–37.25)      22 (12.5–37.5)
Radiation, mSv (IQR)  38.2 (10.9–77.0)  62.7 (38.8–77.5)   44.0 (17.1–74.6)
Lifetime attributable risk, per 100K (IQR)   201 (68–448)   389 (240–481) 272.7 (105.8–462.7)
Cost – National, in dollars (IQR) 2979 (1560–5440) 5464 (3029–7938)  4064 (1786–7353)
Cost – New York State, in dollars (IQR) 3746 (1951–6803) 6838 (3799–9944)  5077 (2238–9212)
Deceased (%)     11 (21.6)       9 (45.0)      10 (30.3)
New intracranial injury (%)     13 (25.5)     10 (50.0)      12 (36.4)
New intracranial injury or fracture (%)     28 (54.9)     18 (90.0)      24 (72.7)
Focal encephalomalacia (%)     23 (45.1)     15 (75.0)      18 (54.5)
Microvascular disease (%)     28 (54.9)     11 (66.7)      22 (66.7)
Atrophy out of proportion for age (%)     33 (64.7)     15 (75.0)      23 (69.7)

CT = computed tomography; TBI = traumatic brain injury; IQR = interquartile range.