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Table 2 Risk factor analysis

From: Multivariate analysis of pedicle screw invasion of the proximal facet joint after lumbar surgery

Index B SE Wals P OR 95% CI
Lower limit Upper limit
Age (≥50) 0.829 0.146 32.266 0.000 2.291 1.721 3.049
BMI    46.731 0.000    
BMI (24 ~ 28 kg/m2) −0.169 0.179 0.884 0.347 0.845 0.595 1.201
BMI (> 28 kg/m2) 0.935 0.172 29.733 0.000 2.548 1.821 3.567
Proximal facet joint angle    66.542 0.000    
Proximal facet joint angle (35 ~ 45°) 1.148 0.160 51.757 0.000 3.151 2.305 4.308
Proximal facet joint angle (> 45°) 1.275 0.200 40.678 0.000 3.578 2.418 5.294
Degenerative lumbar spondylolisthesis (yes) 0.783 0.143 29.919 0.000 2.187 1.652 2.895
Isthmic lumbar spondylolisthesis (yes) 0.879 0.207 18.020 0.000 2.410 1.605 3.616
Fixed segment (lower lumbar) 1.069 0.143 56.212 0.000 2.912 2.202 3.851
Constant −3.831 0.311 151.367 0.000 0.022