Table 4.
Comparison of patients with broken and intact tethers at latest follow-up.
| Broken Tether (n = 19) |
Intact Tether (n = 29) * |
p-Value | |
|---|---|---|---|
| All Curve Types | |||
| PTC (°) (% Correction) |
10.4 ± 8.1 (21.7%) |
12.8 ± 7.7 (31.7%) |
0.31 0.15 |
| MT (°) (% Correction) |
21.3 ± 9.7 (42.5%) |
23.4 ± 8.2 (47.6%) |
0.41 0.36 |
| TL (°) (% Correction) |
23.9 ± 5.9 (47.5%) |
19.2 ± 9.2 (54.0%) |
0.05 0.29 |
| T5-T12 Kyphosis (°) | 22.4 ± 9.0 | 26.5 ± 14.1 | 0.36 |
| T12-S1 Lordosis (°) | 55.5 ± 12.6 | 55.8 ± 13.6 | 0.95 |
| Curves ≤ 30° | 15/19 = 79% | 22/29 = 76% | 0.80 |
| Major Thoracic | |||
| Broken Tether (n = 7) |
Intact Tether (n = 17) |
p-Value | |
| PTC (°) (% Correction) |
17.4 ± 5.5 (26.1%) |
16.1 ± 8.0 (37.2%) |
0.70 0.17 |
| MT (°) (% Correction) |
30.0 ± 6.0 (41.6%) |
26.0 ± 8.6 (48.9%) |
0.28 0.29 |
| TL (°) (% Correction) |
22.9 ± 6.8 (48.2%) |
19.1 ± 9.6 (44.6%) |
0.36 0.92 |
| T5-T12 Kyphosis (°) | 26.4 ± 8.1 | 22.6 ± 10.1 | 0.38 |
| T12-S1 Lordosis (°) | 57.7 ± 8.3 | 55.9 ± 10.8 | 0.70 |
| Major Thoracolumbar | |||
| Broken Tether (n = 8) |
Intact Tether (n = 16)* |
p-Value | |
| PTC (°) (% Correction) |
7.4 ± 6.4 (12.9%) |
8.1 ± 4.1 (19.8%) |
0.60 0.45 |
| MT (°) (% Correction) |
16.6 ± 8.2 (39.3%) |
19.8 ± 6.2 (46.3%) |
0.22 0.85 |
| TL (°) (% Correction) |
25.5 ± 5.2 (46.6%) |
19.3 ± 9.1 (63.6%) |
0.10 0.01 |
| T5-T12 Kyphosis (°) | 23.9 ± 17.1 | 32.3 ± 17.5 | 0.22 |
| T12-S1 Lordosis (°) | 57.4 ± 11.2 | 55.6 ± 17.3 | 0.99 |
* There was one revision that was not included in either broken or intact numbers as a final fusion was performed.