Table 3.
Radiographic outcomes of the two groups of patients with lumbar spinal stenosis
| Groups | Preoperative | Postoperative | t | P |
|---|---|---|---|---|
| ROM of stabilized segment (°) | ||||
| Total | 7.8 ± 2.4 | 4.5 ± 1.5 | 7.18 | <0.01† |
| Stenosis group | 7.6 ± 2.5* | 4.4 ± 1.5* | 4.20 | <0.01† |
| Spondylolisthesis group | 8.2 ± 2.3* | 4.7 ± 1.4* | 3.20 | <0.01† |
| ROM of the upper adjacent segment (°) | ||||
| Total | 8.3 ± 2.4 | 10.4 ± 2.4 | 2.87 | 0.01† |
| Stenosis group | 8.6 ± 2.7* | 10.7 ± 2.5* | 2.76 | 0.01† |
| Spondylolisthesis group | 7.7 ± 2.0* | 10.1 ± 2.2* | 2.20 | 0.01† |
| Disc height of stabilized segment (mm) | ||||
| Total | 11.9 ± 2.1 | 12.5 ± 1.5 | 1.43 | 0.15 |
| Stenosis group | 12.0 ± 2.1* | 12.4 ± 1.4* | 0.53 | 0.45 |
| Spondylolisthesis group | 11.7 ± 2.2* | 12.6 ± 1.8* | 0.82 | 0.23 |
| Disc height of the upper adjacent segment (mm) | ||||
| Total | 12.5 ± 2.0 | 11.0 ± 1.7 | 2.94 | 0.01† |
| Stenosis group | 12.4 ± 1.8* | 11.0 ± 1.6* | 2.56 | 0.01† |
| Spondylolisthesis group | 12.6 ± 2.3* | 10.9 ± 1.6* | 2.35 | 0.03† |
Values are presented as the mean ± SD. *No significant difference preoperatively and at the final follow-up between the stenosis (n = 23) and spondylolisthesis (n = 15) groups using the independent two-sample t-test, P>0.05; †Significant difference between pre- and post-operative condition in each group using the paired t-test. ROM: Range of motion; SD: Standard deviation.