Factors that influence long term instrumentation stability in patients with unstable thoracolumbar injuries

Table 1 Characteristics of the enrolled group

Characteristics	Value
Age (years)	m = 40 (σ = 15.01; range: 18-71 years)
Male to female ratio	117/87
Patients with radiodensity of cancellous bone below 110 HU	63%-30.9%
Intermediate fixation used	93%-45.6 %
Laminectomy	66%-32.4%
Total facet joints and ligamentum flavum removal	48%-23.5%
Extensive decompression with laminectomy and at least one level total facetectomy and ligamentum flavum removal	37%-18.1%
Reconstruction of the anterior column	76%-37.2%
Anterior decompression	31%-15.1%
Monosegmental short fixation	10%-4.9%
Bisegmental fixation	139%-68.1%
Three segment fixation	21%-10.3%
Four segment fixation	34%-16.7%
Lumbosacral fixation	6%-2.9%
Residual kyphotic deformity	38%-18.6%

HU: Hounsfield units.