Table 1.
The clinical data of 114 patients who underwent posterior orthopedic surgery for AIS.
| Parameters | Mean | SD |
|---|---|---|
| Gender (male/female) | 38/76 | |
| Age (year) | 14.86 | 4.84 |
| BMI (kg/m2) | 18.73 | 3.45 |
| The number of surgical fixation segments | 9.62 | 2.56 |
| The number of pedicle screws | 17.14 | 4.39 |
| Operative time (min) | 311.23 | 117.63 |
| PLTpre (109/L) | 235.06 | 55.28 |
| PLTpost (109/L) | 190.59 | 73.92 |
| TBV (mL) | 3429.19 | 720.19 |
| Blood transfusion volume (mL) | 822.46 | 523.59 |
| TBL (mL) | 1655.51 | 564.10 |
| TBL (mL/level) | 173.51 | 40.13 |
| HBL (mL) | 475.09 | 197.59 |
| HBL (mL/level) | 48.64 | 13.10 |
| HBL/TBL | 0.29 | 0.08 |
| Hospital stay (day) | 12.26 | 1.95 |
| Type of scoliosis (1/5/others) | 68/37/9 | |
| Risser sign | 3.46 | 1.06 |
| Correction angle (°) | 29.39 | 12.84 |
AIS: adolescent idiopathic scoliosis; BMI: body mass index; TBL: total blood loss; HBL: hidden blood loss; TBV: total blood volume; PLTpre: preoperative platelets; PLTpost: postoperative platelets.