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Table 4 Details of mechanical failures

From: Surgical outcomes of spinal fusion for osteoporotic thoracolumbar vertebral fractures in patients with Parkinson’s disease: what is the impact of Parkinson’s disease on surgical outcome?

Mechanical failure PD group (N of patients) Non-PD group (N of patients)
Overall [incidence] 7 [26.9%] 53 [17.9%]
Pedicle/vertebral screw pull-out 4 24
Intervertebral cage migration 0 9
Uppermost vertebral fracture 2 11
Lowermost vertebral fracture 1 4
Hook dislodgement 0 3
Rod fracture 0 2
  1. Abbreviation: N number