Cobb angles of the main and minor curve in the pre- and postoperative radiographs and the perioperative correction of the Cobb angle by the different techniques.
| Technique | Preoperative Cobb Angle, ° | Postoperative Cobb Angle, ° | Correction of Cobb Angle, ° (%) | |||
| Main Curve | Minor Curve | Main Curve | Minor Curve | Main Curve | Minor Curve | |
| All | ||||||
| Mean | 57.26 | 42.23 | 27.95 | 22.20 | 30.33 (52.9) | 20.03 (47.4) |
| SEM | 1.81 | 1.81 | 1.60 | 1.49 | 1.45 | 1.74 |
| SF | ||||||
| Mean | 55.50 | 34.36 | 27.43 | 22.93 | 27.53 (49.6) | 15.10 (43.9) |
| SEM | 2.15 | 1.50 | 1.83 | 1.90 | 1.61 | 1.60 |
| NSF | ||||||
| Mean | 59.72 | 43.99 | 28.37 | 21.18 | 31.35 (52.3) | 26.90 (61.2) |
| SEM | 3.00 | 3.47 | 2.68 | 2.34 | 2.36 | 2.92 |
| HTH | ||||||
| Mean | 61.57 | 44.00 | 28.57 | 20.12 | 33.00 (53.6) | 25.94 (59.0) |
| SEM | 3.18 | 3.55 | 2.87 | 2.38 | 2.41 | 3.36 |
| HTHT | ||||||
| Mean | 53.37 | 33.52 | 26.46 | 22.63 | 26.22 (48.9) | 16.58 (49.5) |
| SEM | 1.86 | 1.83 | 1.72 | 1.87 | 1.66 | 1.65 |
| AS | ||||||
| Mean | 57.59 | 38.15 | 30.05 | 26.58 | 27.54 (47.8) | 14.58 (38.2) |
| SEM | 5.46 | 2.62 | 4.48 | 4.74 | 3.36 | 2.89 |
Abbreviations: AS, all screws technique; HTH, hybrid technique with screws and hooks; HTHT, hybrid technique with screws, hooks, and tapes; NSF, nonselective fusion; SF, selective fusion.