Table 1.
Demographic characteristics and clinical features of the patients
| Characteristic | Value |
|---|---|
| Age at surgery (yr) | 15.0±1.9 (11 to 20) |
| Weight (kg) | 56.0±13.3 (28.2 to 107) |
| Height (cm) | 161±9.3 (133 to 193) |
| Body mass index (kg/m2) | 21.8±5.1 (15.1 to 48.8) |
| Risser sign | |
| Grade 0 | 14 (11.5) |
| Grade 1 | 19 (15.6) |
| Grade 2 | 22 (18.0) |
| Grade 3 | 22 (18.0) |
| Grade 4 | 24 (19.7) |
| Grade 5 | 21 (17.2) |
| Median Risser grade | 3 (0 to 5) |
| No. of fused levels | 11.1±1.5 (8 to 15) |
| No. of pedicle screws | 16.6±2.46 (12 to 23) |
| No. of pedicle screws per level fused (pedicle screw density) | 1.50±0.20 (1.14 to 2.0) |
| No. of other anchors (hooks/wires/clamps) | 1.15±0.90 (0 to 5) |
| Preoperative major Cobb angle (°) | 55.3±7.2 (45 to 80) |
| Supine side bending major Cobb angle (°) | 28.0±10.0 (1 to 55) |
| Preoperative curve flexibility (%) | 49.9±15.2 (24 to 98) |
| Final postoperative major Cobb angle (°) | 18.3±7.2 (3 to 36) |
| Absolute degree of Cobb angle correction | 37±7.1 (14 to 56) |
| Percent major curve correction | 67.2±11.7 (28 to 94) |
| Correction index | 1.45±0.44 (0.69 to 2.28) |
| Preoperative T2–T12 kyphosis angle (°) | 34.1±8.8 (15 to 53) |
| Final postoperative T2–T12 kyphosis angle (°) | 31.6±8.7 (10 to 50) |
| Change in T2–T12 kyphosis angle (°) | −2.4±6.9 (−19 to 14) |
| Preoperative rib index | 1.89±0.29 (1.25 to 2.58) |
| Final postoperative rib index | 1.6±0.23 (1.1 to 2.1) |
| Percent rib index correction | 17.4±10.1 (0.1 to 44.5) |
| Loss-correction rate (%) | 5.08±6.3 (0 to 32) |
| Follow-up time (mo) | 40.1±14.4 (24 to 92) |
Values are presented as mean±standard deviation (range) or frequency of the patients (%).