Patient spondylolisthesis, anterior disc height, and posterior disc height.
| Variable | Baseline, Mean (SD) (n = 16) | 6 Weeks, Mean (SD) (n = 16) | 6 Months, Mean (SD) (n = 10) | 12 Months, Mean (SD) (n = 6) | P Value |
| Spondylolisthesis (mm) | 8.6 (5.4) | 5.0 (2.0) | 4.3 (2.7) | 3.7 (2.11) | 6 weeks: P = 0.005 6 months: P = 0.036 12 months: P = 0.044 |
| Anterior disc height (mm) | 6.9 (3.6) | 11.9 (3.5) | 11.9 (4.0) | 10.5 (3.0) | 6 weeks: P < 0.0002 6 months: P = 0.003 12 months: P = 0.040 |
| Posterior disc height (mm) | 5.9 (2.7) | 8.9 (2.8) | 8.0 (1.3) | 9.0 (4.1) | 6 weeks: P = 0.0005 6 months: P = 0.018 12 months: P = 0.048 |