Table 1. Patient data and clinical outcomes in two groups (mean±SD).
| The open group (n = 37) | The mini-open group (n = 35) | P | |
| Age (years) | 38.4±20.2 | 41.2±16.6 | 0.524 |
| Sex (male/female) | 23/14 | 21/14 | 0.851 |
| T11/ T12/ L1/ L2 | 6/11/13/7 | 6/10/11/8 | 0.973 |
| Total screws placed(successes/failure) | 148(143/5) | 140(134/6) | 0.688 |
| Fluoroscopy time (seconds) | 9.2±2.1 | 9.6±2.2 | 0.430 |
| Operative time (minutes) | 95.0±23.2 | 82.5±20.4 | 0.018 |
| Blood loss (mL) | 144.8±56.6 | 34.5±13.4 | <0.001 |
| Postoperative drainage (mL) | 77.9±37.3 | 11.9±5.4 | <0.001 |
| Postoperative hospital stay (days) | 9.1±1.8 | 3.4±1.2 | <0.001 |