Table 1.
Main Data of the Study.
| Group A | Group B | P | |
|---|---|---|---|
| Patients, n | 45 | 48 | — |
| Age, years | |||
| Mean ±SD | 16.2 ± 2.54 | 17 ± 2.36 | .35 |
| Range | 14-19 | 15-19 | — |
| Gender, n (%) | |||
| Male | 3 (6.67) | 3 (6.25) | .59 |
| Female | 42 (93.33) | 45 (93.74) | .52 |
| Body mass index, kg/m2 | |||
| Mean ± SD | 18.4 ± 2.55 | 18.1 ± 2.47 | .55 |
| Lenke classification, n (%) | |||
| Lenke 1 | 12 (26.67%) | 11 (22.92%) | .21 |
| Lenke 2 | 7 (15.56) | 8 (16.67) | .38 |
| Lenke 3 | 6 (13.33) | 7 (14.58) | .33 |
| Lenke 4 | 5 (11.11) | 6 (12.5) | .28 |
| Lenke 5 | 8 (17.78) | 9 (18.75) | .33 |
| Lenke 6 | 7 (15.56) | 7 (14.58) | .31 |
| Preoperative major Cobb angle, deg | |||
| Mean ± SD | 67.5 ± 13.5 | 65.6 ± 11.8 | .28 |
| Preoperative hemoglobin, g/dL | |||
| Mean ± SD | 12.85 ± 1.49 | 13.05 ± 1.28 | .63 |
| Total operative time, min | |||
| Mean ± SD | 373.4 ± 34.5 | 446.0 ± 38.6 | .0087 |
| Instrumented vertebrae | |||
| Mean ± SD | 11.3 ± 2.72 | 11.5 ± 2.85 | .66 |
| Intraoperative total blood loss, mL | |||
| Mean ± SD | 344.62 ± 55.24 | 576.35 ± 89.56 | .0001* |
| Intraoperative total blood loss per kilogram of body weight, mL/kg | |||
| Mean ± SD | 4.45 ± 0.526 | 4.877 ± 0.743 | .645 |
| Volume of reinfused blood, mL | |||
| Mean ± SD | 184.56 ± 32.44 | 325.3 ± 52.336 | .003* |
| Postoperative hemoglobin, g/dL | |||
| Mean ± SD | 10.4 ± 0.62 | 9.43 ± 1.18 | .01* |
| Blood transfusion rate, n of patients (%) | 3/45 (6.67) | 9/48 (18.75) | .0001* |
| Hospital stay, days | |||
| Mean ± SD | 6.57 ± 1.59 | 11.18 ± 3.66 | .0011* |
| Mean arterial pressure prior to incision, mm Hg | |||
| Mean ± SD | 71.43 ± 3.56 | 74.55 ± 4.22 | .232 |
* Significant P value (unpaired t test). **Significant P value (chi-square test).