Table 2.
Clinical and radiographic outcomes in each group
| Parameter | Group A | Group B | P value |
|---|---|---|---|
| ESR (mm/h) change from before treatment to final follow-up | 51.31 ± 18.54 | 58.12 ± 15.32 | 0.125 |
| 10.61 ± 2.96* | 12.52 ± 1.25* | 0.223 | |
| VAS score change from before treatment to final follow-up | 6.4 ± 0.88 | 6.7 ± 0.45 | 0.654 |
| 1.62 ± 0.65* | 1.71 ± 0.35* | 0.699 | |
| ODI score change from before treatment to final follow-up | 39.15 ± 4.02 | 40.05 ± 3.22 | 0.774 |
| 4.68 ± 1.43* | 4.83 ± 1.15* | 0.805 | |
| Severity of neurological deficits | |||
| Before treatment | |||
| ASIA A | |||
| ASIA B | |||
| ASIA C | 18 | 19 | 0.721 |
| ASIA D | 10 | 8 | 0.735 |
| ASIA E | 2 | 3 | 0.810 |
| At the final follow-up | |||
| ASIA A | |||
| ASIA B | |||
| ASIA C | |||
| ASIA D | 2 | 1 | 0.794 |
| ASIA E | 28 | 29 | 0.808 |
| Kyphosis angle(。) before treatment the final follow-up | 18.77 ± 2.49 | 17.97 ± 2.80 | 0.301 |
| 9.31 ± 1.54* | 6.25 ± 1.04* | 0.009 | |
| Loss of angular correction (。) | |||
| 1 week post-op | 1.10 ± 1.10 | 1.25 ± 1.05 | 0.701 |
| 3 months post-op | 6.50 ± 3.50 | 6.90 ± 4.30 | 0.030 |
| 6 months post-op | 7.70 ± 3.30 | 9.50 ± 4.05 | 0.024 |
| 12 months post-op | 8.95 ± 4.60 | 11.55 ± 4.85 | 0.012 |
| Final follow-up | 9.60 ± 1.12 | 11.85 ± 1.80 | 0.006 |
| Height loss of fused segment (mm) | |||
| 1 month post-op | 0.68 ± 0.23 | 0.58 ± 0.33 | 0.853 |
| 3 months post-op | 1.07 ± 0.66 | 1.94 ± 0.51 | 0.021 |
| 6 months post-op | 1.90 ± 0.74 | 2.48 ± 1.36 | 0.015 |
| 12 months post-op | 2.08 ± 0.85 | 2.64 ± 1.42 | 0.010 |
| Final follow-up | 2.58 ± 0.45 | 2.78 ± 0.95 | 0.007 |
| Implant subsidence | 3.3%(1/30) | 13.3%(4/30) | 0.122 |
*P < 0.05: at the final follow-up vs. before treatment
VAS visual analogue scale, ODI Oswestry Disability Index, ESR erythrocyte sedimentation rate, CRP C-reactive protein, ASIA American Spinal Injury Association