Table 1. Characteristics of population.
| Variable | Mean | Standard deviation |
|---|---|---|
| Age (years old) | 13.56 | 3.58 |
| Body mass index (kg/m 2 ) | 19.58 | 6.25 |
| Preoperative Cobb angle (°) | 67.60 | 17.77 |
| Postoperative Cobb angle (°) | 24.56 | 15.43 |
| Correction percentage (%) | 65.13 | 17.77 |
| Fusion levels | 13.36 | 2.580 |
| Surgery duration (hours) | 3.26 | 0.69 |
| Hemoglobin preoperative (g/dL) | 13.61 | 1.08 |
| Albumine preoperative (mg/dL) | 24.90 | 5.83 |
| Proteins preoperative (mg/dL) | 71.88 | 9.49 |
| Drainage intraoperative (mL) | 962.37 | 461.08 |
| Percentage of blood loss (%) | 35.63 | 17.49 |