Table 4.
Correction parameters and material of the spinal instrumentations
| Stainless steel construct | Titanium rod construct | p value | |
|---|---|---|---|
| rAVR (°) | |||
| Preoperation | 26.26 ± 4.92 | 30.24 ± 9.83 | 0.229 |
| Postoperation | 14.16 ± 5.11 | 16.93 ± 9.25 | 0.379 |
| Postoperative 2 years | 16.46 ± 1.58 | 19.86 ± 10.07 | 0.315 |
| Correction loss at 2 years | 2.29 ± 0.65 | 2.93 ± 0.99 | 0.018* |
| Cobb angle (°) | |||
| Preoperation | 59.02 ± 10.99 | 59.58 ± 11.21 | 0.899 |
| Postoperation | 15.31 ± 8.10 | 11.47 ± 6.33 | 0.179 |
| Postoperative 2 years | 18.01 ± 9.15 | 13.70 ± 6.39 | 0.161 |
| Correction loss at 2 years | 2.70 ± 1.51 | 2.23 ± 1.29 | 0.356 |
| AVT (mm) | |||
| Preoperation | 58.87 ± 22.87 | 54.96 ± 13.30 | 0.579 |
| Postoperation | 13.97 ± 11.54 | 16.18 ± 7.85 | 0.558 |
| Postoperative 2 years | 15.81 ± 9.86 | 21.44 ± 13.54 | 0.250 |
| Correction loss at 2 years | 1.84 ± 2.46 | 5.25 ± 10.63 | 0.324 |
| Thoracic kyphosis angle (°) | |||
| Preoperation | 23.76 ± 11.24 | 26.09 ± 10.10 | 0.580 |
| Postoperation | 18.49 ± 7.14 | 22.04 ± 9.85 | 0.316 |
| Postoperative 2 years | 19.96 ± 7.47 | 23.81 ± 9.90 | 0.286 |
| Correction loss at 2 years | 1.47 ± 0.67 | 1.77 ± 0.55 | 0.183 |
| ATR (°) | |||
| Preoperation | 20.00 ± 9.37 | 18.88 ± 5.77 | 0.702 |
| Postoperation | 6.36 ± 4.37 | 4.81 ± 3.33 | 0.305 |
| Postoperative 2 years | 8.82 ± 5.67 | 7.44 ± 4.07 | 0.467 |
| Correction loss at 2 years | 2.46 ± 1.44 | 2.63 ± 1.67 | 0.749 |
* Significant difference by a two-way repeated measures ANOVA