From: The limitations of using risk factors to screen for blunt cerebrovascular injuries: the harder you look, the more you find
Pre-Protocol
Post-Protocol
n
%
p
All patients
2374
36.0
4228
64.0
CTA of the neck
35
1.5
802
19.0
0.001
BCVI
5
0.2
46
1.1
0.00003