| Variable | Number (%) | ||
| Gender | Female | 40 (60.6%) | |
| Male | 26 (39.4%) | ||
| Type of scoliosis | L1 | 37 (56.1%) | |
| L2 | 8 (12.1%) | ||
| L3 | 11(16.7%) | ||
| L5 | 10 (15.2%) | ||
| System | U.Clamp | 36 (54.5%) | |
| Multi Seg. | 30 (45.5%) | ||
| Age, Mean (SD) | 15.06 (2.0) | ||
| Hb before surgery, Mean (SD) | 13.3 (0.56) | ||