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Table 5 The analysis of risk factors for L4/5 and L5S1 facet joints

From: Risk factor analysis of disc and facet joint degeneration after intersegmental pedicle screw fixation for lumbar spondylolysis

  L4/5 L5S1
Degeneration No change   p value Degeneration No change   p value
Age (y) 26.29 ± 5.38 22.23 ± 4.24 2.278 0.027* 23.22 ± 4.82 22.67 ± 4.56 0.331 0.742
BMI 23.37 ± 0.59 22.72 ± 1.06 1.572 0.122 23.49 ± 0.81 22.67 ± 1.03 2.225 0.030*
Fixed time (m) 25.86 ± 8.86 15.72 ± 4.98 4.495 0.000* 25.56 ± 4.67 15.33 ± 5.39 5.297 0.000*
Vertebral slip (no.)    0.000 1.000    1.922 0.166
Yes 3 17    1 19   
No 4 30    8 26   
Facet grade pre-operation    0.614 0.852    3.569 0.389
Grade 4 1 13    1 10   
Grade 3 5 27    4 17   
Grade 2 1 7    3 10   
Grade 1 0 0    1 8   
Grade 0 0 0    0 0   
Disc grade pre-operation    2.934 0.317    6.404 0.145
Grade 1 1 11    1 12   
Grade 2 2 26    6 16   
Grade 3 2 7    0 12   
Grade 4 2 7    2 4   
Grade 5 0 0    0 1   
  1. BMI, Body Mass Index
  2. *Test was considered statistically significant at p < 0.05