Table 1 The comparison between extended fusion and TL/L fusion group
Variables | Extended fusion group (n = 38) | TL/L fusion group (n = 60) | P value |
|---|---|---|---|
Age (years) | 15.4 ± 2.5 | 15.7 ± 2.7 | 0.66 |
Risser sign | 3.2 ± 1.4 | 3.4 ± 1.6 | 0.54 |
Pre TK form (T5-T12) | |||
Hyperkyphosis | 4 | 2 | |
Normal | 30 | 50 | |
Hypokyphosis | 4 | 8 | |
Mean fusion level | 11.2 ± 1.2 | 7.1 ± 1.1 | < 0.01* |
Cobb angle of main TL/L curve(°) | |||
Pre-OP | 54.9 ± 8.9 | 52.1 ± 9.1 | 0.14 |
Bending | 26.3 ± 10.2 | 25.3 ± 10.2 | 0.65 |
Post-OP | 8.5 ± 7.1 | 8.0 ± 7.0 | 0.72 |
Follow-Up | 9.6 ± 7.7 | 9.3 ± 7.5 | 0.85 |
Cobb angle of T curve(°) | |||
Pre-OP | 36.4 ± 7.3 | 26.5 ± 6.8 | < 0.01* |
Bending | 21.8 ± 3.3 | 13.8 ± 6.6 | < 0.01* |
Post-OP | 9.6 ± 6.4 | 11.0 ± 7.4 | 0.35 |
Follow-Up | 10.2 ± 6.3 | 12.6 ± 8.1 | 0.13 |
TK(°) | |||
Pre-OP | 22.6 ± 12.5 | 19.6 ± 8.8 | 0.16 |
Post-OP | 21.2 ± 8.3 | 22.5 ± 7.6 | 0.40 |
Follow-Up | 22.3 ± 11.3 | 24.9 ± 8.5 | 0.21 |
Immediate Post-OP change | -1.4 ± 11.1 | 2.9 ± 6.0 | 0.01* |
GTK (°) | |||
Pre-OP | 29.1 ± 13.6 | 28.3 ± 11.8 | 0.78 |
Post-OP | 30.0 ± 9.2 | 31.8 ± 11.0 | 0.40 |
Follow-Up | 31.8 ± 12.1 | 33.9 ± 10.8 | 0.36 |
LL (°) | |||
Pre-OP | 52.8 ± 10.7 | 51.0 ± 11.3 | 0.42 |
Post-OP | 52.1 ± 8.3 | 50.3 ± 9.4 | 0.33 |
Follow-Up | 52.7 ± 9.8 | 52.1 ± 9.0 | 0.78 |
TIA(°) | |||
Pre-OP | 67.2 ± 7.5 | 66.7 ± 7.2 | 0.77 |
Post-OP | 67.3 ± 7.2 | 67.4 ± 7.0 | 0.94 |
Follow-Up | 67.7 ± 7.5 | 66.7 ± 7.1 | 0.54 |
PJA(°) | |||
Pre-OP | 8.9 ± 4.0 | 8.9 ± 4.4 | 0.97 |
Post-OP | 12.8 ± 5.9 | 10.1 ± 5.2 | 0.02* |
Follow-Up | 17.1 ± 8.5 | 13.3 ± 6.5 | 0.01* |
Increasing PJK | 8.2 ± 7.7 | 4.4 ± 4.9 | 0.01* |