Difference between preoperative and postoperative LL and PI for the different techniques.
| Technique | Preoperative | Postoperative | Pre- and Postoperative |
| All | |||
| Mean | 5.8073 | 4.1262 | 1.3875 |
| SEM | 1.94256 | 2.39210 | 2.46151 |
| NSF | |||
| Mean | 6.54 | 0.36 | 6.18 |
| SEM | 3.25 | 3.78 | 3.34 |
| SF | |||
| Mean | 5.47 | 5.81 | -0.92 |
| SEM | 1.83 | 2.39 | 2.56 |
Abbreviations: LL, lumbar lordosis; PI, pelvic incidence.