Comparisons between anterior and posterior surgery cases.
| Characteristics | Anterior Group (N = 41) | Posterior Group (N = 300) | P |
| Gender, men:women | 30:11 | 210:90 | 0.85 |
| Age, y, mean ± SD | 57.8 ± 11.2 | 69.4 ± 13.3 | <0.01 |
| Surgical time, min | 193 ± 67 | 164 ± 87 | 0.016 |
| Blood loss volume, mL | 68 ± 93 | 130 ± 158 | <0.01 |
| Preoperative D-dimer, μg/mL | 0.6 ± 0.3 | 1.5 ± 2.7 | <0.01 |
| Postoperative D-dimer, μg/mL | 3.0 ± 2.1 | 2.9 ± 2.6 | 0.89 |
| VTE, n (%) | 0 (0%) | 9 (3.0%) | 0.60 |
Abbreviation: VTE, venous thromboembolism.
Note: Values represent the mean ± SD unless otherwise indicated.