| Characteristic | N = 116 |
| Mean age ± standard deviation in months | 147.5 ± 40.2 |
| Median weight (interquartile range) in kilograms | 34 (24 - 45) |
| ASA I n (%) | 1 (0.9) |
| ASA II n (%) | 35 (30) |
| ASA III n (%) | 63 (54.3) |
| ASA IV n (%) | 17 (14.7) |
| Idiopathic scoliosis n (%) | 45 (38.8) |
| Non idiopathic scoliosis n (%) | 71 (61.2) |
| Emergency surgery n (%) | 5 (4.3) |
| Elective surgery n (%) | 111 (95.7) |
| Re-operation n (%) | 12 (10.3) |
| Patients with intra-operative and or postoperative complications (organ failure or sepsis) n (%) | 28 (24.1) |
| Intra-operative anaphylaxis n (%) | 1 (0.9) |
| Intra-operative respiratory failure n (%) | 1 (0.9) |
| Intra-operative hemorrhagic shock n (%) | 3 (2.6) |
| Postoperative renal failure n (%) | 1 (0.9) |
| Postoperative cardio-circulatory failure n (%) | 2 (1.7) |
| Postoperative respiratory failure n (%) | 3 (2.6) |
| Postoperative neurologic failure n (%) | 7 (6) |
| Postoperative abdominal sepsis n (%) | 2(1.7) |
| Postoperative septicemia n (%) | 2 (1.7) |
| Postoperative urinary sepsis n (%) | 3 (2.6) |
| Postoperative surgical wound sepsis n (%) | 8 (6.9) |
| In-hospital mortality n (%) | 0 (0) |
| Transfusion n (%) | 56 (48.3) |
| Median length of intensive care unit stay in days (range) | 4 (0 - 25) |
| Median length of hospital stay in days (range) | 10 (1 - 50) |
| Median total length of hospital stay in days (range) | 12 (2 - 67) |
| Median length of mechanical ventilation in days (range) | 0 (0 - 21) |
| Median packed red blood cells volume in units (range) | 0 (0 - 3) |
| Median fresh frozen plasma volume in units (range) | 0 (0 - 5) |
| Median concentrated platelet units (range) | 0 (0 - 2) |
| Mean preoperative hemoglobin levels ± standard deviation in g/dL | 12.4 ± 1.7 |
| Mean postoperative hemoglobin levels ± standard deviation in g/dL | 10.7 ± 1.6 |
| Median crystalloid volume in ml (range) | 1750 (500 - 4684) |
| Median colloid volume in ml (range) | 2000 (0 - 6952) |