Table 1 Comparison of baseline characteristics between the derivation and validation groups.
Variables | Total | Derivation group | Validation group | P value |
|---|---|---|---|---|
Age (years) | 37.3 ± 8.1 | 37.1 ± 8.8 | 37.9 ± 6.3 | 0.605 |
Sex (men/women) | 102/13 | 75/10 | 27/3 | 0.701 |
No. of one/two-level osteotomy | 89/26 | 63/22 | 26/4 | 1.000 |
Sites of one-level osteotomy: T12/L1/L2/L3/L5 | 1/19/54/14/1 | 1/16/34/11/1 | 0/3/20/3/0 | |
Sites of two-level osteotomy: | 1/1/2/11/3/4/1/3 | 1/1/1/8/3/4/1/3 | 0/0/1/3/0/0/0/0 | |
T10 and L1/ T11 and L3/ | ||||
T12 and L2/ T12 and L3/ | ||||
L1 and L3/ L1 and L4/ | ||||
L1 and L5/ L2 and L5 | ||||
Preoperative TK (°) | 53.7 ± 15.8 | 54.7 ± 16.5 | 51.2 ± 13.6 | 0.298 |
Preoperative LL (°) | 5.6 ± 21.0 | 5.7 ± 21.7 | 4.7 ± 19.4 | 0.817 |
Preoperative PT (°) | 36.9 ± 12.1 | 38.3 ± 11.2 | 34.3 ± 12.2 | 0.101 |
Preoperative PI (°) | 47.0 ± 12.0 | 48.2 ± 12.7 | 44.4 ± 9.1 | 0.136 |
Preoperative SS (°) | 10.3 ± 11.8 | 10.1 ± 12.2 | 10.2 ± 10.2 | 0.982 |
Preoperative PI-LL (°) | 52.3 ± 21.2 | 53.3 ± 21.9 | 49.4 ± 19.8 | 0.396 |
Preoperative TPA (°) | 56.0 ± 18.2 | 57.1 ± 19.3 | 53.1 ± 15.1 | 0.322 |
Preoperative SVA (mm) | 234.3 ± 93.5 | 227.1 ± 90.4 | 247.1 ± 96.2 | 0.309 |
Postoperative TK (°) | 48.5 ± 14.0 | 49.3 ± 14.4 | 46.9 ± 12.3 | 0.410 |
Postoperative LL (°) | − 32.3 ± 17.6 | − 32.0 ± 18.2 | − 34.4 ± 14.8 | 0.520 |
Postoperative PT (°) | 29.3 ± 10.4 | 30.6 ± 10.4 | 25.8 ± 9.9 | 0.051 |
Postoperative PI (°) | 46.7 ± 11.1 | 47.8 ± 11.4 | 43.8 ± 9.9 | 0.088 |
Postoperative SS (°) | 17.4 ± 11.9 | 16.9 ± 12.8 | 18.3 ± 8.9 | 0.600 |
Postoperative PI-LL (°) | 14.3 ± 16.6 | 16.0 ± 16.6 | 9.7 ± 16.0 | 0.076 |
Postoperative TPA (°) | 29.9 ± 11.5 | 31.0 ± 11.9 | 26.8 ± 9.6 | 0.081 |
Postoperative SVA (mm) | 87.3 ± 58.9 | 87.1 ± 58.4 | 87.9 ± 61.5 | 0.950 |
OVA correction (°) | 45.8 ± 18.4 | 45.8 ± 19.9 | 46.0 ± 14.0 | 0.950 |
