Table 3.
Statistical analysis of pre- and post-operative parameters (PI, PT, and SS) of patients in four types.
| Roussouly classification | PI (°) | PT (°) | SS (°) | |||
|---|---|---|---|---|---|---|
| Preoperative | Postoperative | Preoperative | Postoperative | Preoperative | Postoperative | |
| Type I | 45.70 ± 5.59 | 46.44 ± 8.37 | 23.97 ± 4.00 | 16.93 ± 4.01 | 19.06 ± 5.76 | 33.46 ± 6.64 |
| t value | -0.558 | 142.830 | -10.796 | |||
| P value | 0.580 | <0.001 | <0.001 | |||
| Type II | 47.92 ± 4.18 | 59.63 ± 4.44 | 20.46 ± 3.29 | 16.45 ± 3.26 | 28.38 ± 3.61 | 35.36 ± 5.65 |
| t value | -1.500 | 124.418 | -11.134 | |||
| P value | 0.137 | <0.001 | <0.001 | |||
| Type III | 61.13 ± 4.90 | 61.85 ± 4.20 | 18.73 ± 3.67 | 18.22 ± 3.84 | 37.75 ± 1.47 | 39.33 ± 1.47 |
| t value | -0.794 | 1.140 | -26.882 | |||
| P value | 0.439 | 0.271 | <0.001 | |||
| Type IV | 62.06 ± 3.14 | 60.50 ± 4.07 | 14.67 ± 2.53 | 15.50 ± 2.58 | 48.96 ± 1.99 | 45.02 ± 3.10 |
| t value | 1.604 | -11.155 | 6.472 | |||
| P value | 0.131 | <0.001 | <0.001 | |||
PI; pelvic incidence; PT: pelvic tilt; SS: sacral slope.