Table 3.
Subgroup comparison of radiographic parameters
| Variable | Group 1 (Postop TK ≥ 20°) |
Group 2 (Postop TK<20°) |
P value |
|---|---|---|---|
| Lenke classification (1/2/3) | 10/4/3 | 18/12/10 | – |
| Riser sign | 2.47 ± 1.23 | 2.90 ± 1.46 | 0.294 |
| Apical vertebra rotation (Nash-Moe) | 1.71 ± 0.47 | 1.60 ± 0.67 | 0.558 |
| Convex-Bending Cobb angle (°) | 27.12 ± 5.48 | 31.53 ± 7.33 | 0.804 |
| Flexibility (%) | 51 ± 4 | 42 ± 8 | <0.0001 |
| Preoperative MT Cobb angle (°) | 55.82 ± 10.48 | 54.98 ± 12.23 | 0.804 |
| Postoperative MT Cobb angle (°) | 17.88 ± 7.53 | 14.83 ± 7.59 | 0.169 |
| Change in MT Cobb angle (°) | 37.94 ± 9.65 | 40.15 ± 8.28 | 0.384 |
| MT curve correction (%) | 68 ± 13 | 74 ± 10 | 0.079 |
| Preoperative TK (T5–T12; °) | 5.18 ± 3.28 | 4.58 ± 3.54 | 0.552 |
| Postoperative TK (T5–T12; °) | 23.41 ± 3.20 | 14.70 ± 3.22 | <0.0001 |
| Change in TK (T5–T12; °) | 18.24 ± 4.05 | 10.13 ± 3.99 | <0.0001 |
| Preoperative LL (L1–S1; °) | −45.76 ± 9.68 | −48.80 ± 9.33 | 0.271 |
| Postoperative LL (L1–S1; °) | −50.82 ± 8.75 | −51.35 ± 8.49 | 0.833 |
| Change in LL (L1–S1; °) | −5.06 ± 13.51 | −2.55 ± 10.35 | 0.449 |
Values are mean ± standard deviation, number of participants, or as otherwise indicated
MT indicates main thoracic; TK thoracic kyphosis, LL lumbar lordosis