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Table 1 Patients’ data

From: Lumbosacral pedicle screw placement using a fluoroscopic pedicle axis view and a cannulated tapping device

N 176
Age (years old) 65.5 ± 14.0 (range: 20–83)
Male/female 69/107
Disease  
 Isthmic spondylolisthesis 14
 Degenerative spondylolisthesis 63
 Spinal canal stenosis 77
 Degenerative scoliosis 13
 Vertebral fracture 9
Level of pedicle screw placement  
 L1 30
 L2 48
 L3 104
 L4 284
 L5 320
 S1 68
 Total 854