Table 2: Pedicel Screw Perforation Rates from C3 to C7 by Disease

Disease Number of Pedicle Screw Perforation Rates (%)
Grade 1 Grade 2 Grade 3 Grade 3 Grade 2+3
RA 54 3 2 3.4 8.5
DSA 60 2 3 4.6 7.7
CSM 25 9 6 15.0 37.5
Spine tumor 20 4 0 0 16.7
CP 14 4 2 10.0 30.0