Table 3.

Risk Factors of Instrumentation Failure.

Parameter	p Value
Age	0.308
Sex	0.707
Resection level	0.004*
Length of resected vertebrae	0.017*
Radiation	0.679
Cutting vertebrae	0.170
Cage subsidence (>2mm)	0.123
Progression of cage subsidence	0.101
End cap use	0.659

*Statistically significant