Table 2.
Statistical analysis of pre and postoperative parameters (GL, GK, and SVA) of patients in four types.
| Roussouly classification | GL (°) | GK (°) | SVA (mm) | |||
|---|---|---|---|---|---|---|
| Preoperative | Postoperative | Preoperative | Postoperative | Preoperative | Postoperative | |
| Type I | 26.55 ± 4.60 | 31.08 ± 4.64 | 34.40 ± 6.82 | 39.46 ± 6.82 | 52.08 ± 13.14 | 40.34 ± 13.13 |
| t value | -104.009 | -108.538 | 270.535 | |||
| P value | <0.001 | <0.001 | <0.001 | |||
| Type II | 38.47 ± 4.73 | 42.13 ± 4.83 | 35.37 ± 6.17 | 39.78 ± 6.16 | 40.82 ± 11.78 | 31.49 ± 11.26 |
| t value | -47.274 | -67.479 | 52.904 | |||
| P value | <0.001 | <0.001 | <0.001 | |||
| Type III | 39.51 ± 4.29 | 40.69 ± 4.24 | 41.18 ± 5.44 | 41.87 ± 5.04 | 40.01 ± 6.22 | 31.84 ± 6.23 |
| t value | -1.769 | -1.015 | 111.426 | |||
| P value | 0.096 | 0.325 | <0.001 | |||
| Type IV | 54.45 ± 6.89 | 53.77 ± 5.81 | 40.08 ± 4.31 | 43.16 ± 3.49 | 30.07 ± 8.57 | 32.17 ± 8.53 |
| t value | 1.225 | -1.844 | -33.120 | |||
| P value | 0.241 | 0.086 | <0.001 | |||
GL: global lordosis; GK; global kyphosis; SVA: sagittal vertical axis.