Table 2.
Description of postoperative parameters and pre- to postoperative changes
| Characteristic | Value |
|---|---|
| Postoperative parameters | |
| Spinal height (mm) | 476.7±61.7 (332.0 to 646.0) |
| SVA (mm) | 52.4±46.4 (-70.0 to 164.0) |
| CVA (mm) | 20.4±16.4 (0.0 to 78.0) |
| Cobb (°) | 11.7±8.1 (0.0 to 41.0) |
| LL (°) | 48.5±11.9 (16.0 to 73.0) |
| PT (°) | 25.2±10.4 (1.0 to 53.0) |
| PI–LL (°) | 11.4±14.8 (-17.0 to 58.0) |
| TK (°) | 42.4±13.3 (8.0 to 78.0) |
| LIFF levels | 2.6±1.0 (1.0 to 4.0) |
| No. of 1 level | 19±18.3 |
| No. of 2 levels | 31±27.9 |
| No. of 3 levels | 35±33.7 |
| No. of 4 levels | 21±20.2 |
| PSO (+/-) | |
| No. of PSO | 14 |
| No. of no PSO | 90 |
| No. of total fusions | 7.0±2.6 (4.0 to 22.0) |
| Pre- to postoperative changes | |
| Spinal height (mm) | -2.6±51.2 (-160.0 to 172.0) |
| SVA (mm) | -17.6±59.2 (-229.0 to 101.0) |
| CVAa) (mm) | 21.2±21.5 (0.0 to 110.0) |
| Cobba) (°) | 16.8±22.7 (0.0 to 64.0) |
| LL (°) | 11.7±15.4 (-20.0 to 54.0) |
| PT (°) | -4.2±11.0 (-46.0 to 26.0) |
| PI–LL (°) | -11.7±15.4 (-54.0 to 20.0) |
| TK (°) | 7.6±11.0 (-15.0 to 35.0) |
Values are presented as mean±standard deviation (range) or number.
SVA, sagittal vertical axis; CVA, coronal vertical axis; Cobb, coronal Cobb angle; LL, lumbar lordosis; PT, pelvic tilt; PI–LL, pelvic incidence–lumbar lordosis mismatch; TK, thoracic kyphosis; LLIF, lateral lumbar interbody; PSO, pedicle subtraction osteotomy.
a)
CVA and Cobb changes are absolute amounts of change. For example, if a patient tilted 5 mm on the left preoperatively, then tilted 3 mm on the right postoperatively, the CVA change is 8 mm.