Non-fusion (n = 19 pars interarticularis) | Fusion group (n = 101 pars interarticularis) | t | χ2 | P value | |
---|---|---|---|---|---|
Age (years) | 22.0 ± 7.7 | 21.0 ± 6.2 | 0.410 | 0.684 | |
Sex | Male:15 | Male:69 | 0.861 | 0.354 | |
Female:4 | Female:32 | ||||
Follow-up time (months) | 18.4 ± 10.1 | 25.9 ± 12.0 | -1.657 | 0.103 | |
BMI | 22.9 ± 3.7 | 23.9 ± 3.1 | -0.841 | 0.404 | |
LL(°) | 54.5 ± 10.6 | 52.9 ± 11.3 | 0.370 | 0.713 | |
SS(°) | 41.4 ± 5.5 | 40.9 ± 7.2 | 0.154 | 0.878 | |
PT(°) | 10.5 ± 6.5 | 11.9 ± 5.8 | -0.620 | 0.538 | |
PI(°) | 51.8 ± 8.6 | 52.8 ± 8.5 | -0.334 | 0.739 | |
Spondylolisthesis | 68.4% | 48.5% | 2.538 | 0.111 | |
SBO | 31.6% | 5.9% | 9.005 | 0.003 | |
Stage of the defect | Stage I:0% | Stage I:11.9% | 39.798 | < 0.001 | |
Stage II: 10.5% | Stage II: 70.3% | ||||
Stage III: 89.5% | Stage III: 17.8% | ||||
Disc degeneration | Grade I: 5.3% | Grade I: 36.6% | 11.846 | 0.003 | |
Grade II: 52.6% | Grade II: 47.5% | ||||
Grade III: 42.1% | Grade III: 13.9% | ||||
Width of the defect (mm) | 4.3 ± 1.8 | 1.9 ± 1.0 | 5.809 | < 0.001 | |
Site of the defect | 0.54 ± 0.10 | 0.55 ± 0.14 | -0.573 | 0.568 | |
Angle of the defect (°) | 16.5 ± 12.4 | 15.6 ± 11.9 | 0.290 | 0.773 |