Table 2. Performance of GFAP in detecting intracranial lesions on CT among different age categories.

Age Categories	Proportion of CTs done in patients with head trauma	Proportion of CTs with traumatic intracranial lesions	Area Under the ROC Curve (95% CI)
Birth – 5 years	37/50 (74%)	6/37 (16%)	0.83 (0.56-1.00)
5.1 - 10 years	16/29 (55%)	1/16 (6%)	0.87 (0.70-1.00)
10.1 – 15 years	35/43 (81%)	6/35 (17%)	0.78 (0.60-0.95)
15.1 – 21 years	64/75 (85%)	5/64 (8%)	0.91 (0.83-0.99)

CT = computed tomography; GFAP = glial fibrillary acidic protein; ROC = receiver operating characteristic