Table 4.
Correlations between sagittal parameters and preoperative PI-LL mismatch and change in LL postoperatively across groups
| T10-L2 | PT | TK | C7SVA | PT/TK ratio | |
|---|---|---|---|---|---|
| Preoperative PI-LL, whole cohort | +0.26 (±0.09) | +0.37 (±0.06) | −0.52 (±0.09) | - | - |
| Perioperative∆LL, whole cohort | - | - | +0.81 (±0.21) | - | - |
| Preoperative PI-LL, low PI subgroup | +0.42 (±0.13) | 0.27 (±0.22) | −0.56 (±0.19) | - | 0.46 (±0.28) |
| Perioperative∆LL, low PI subgroup | - | −0.45 (±0.2) | +0.73 (±0.38) | - | - |
| Preoperative PI-LL, high PI subgroup | +0.27 (±0.08) | 0.48 (±0.11) | −0.72 (±0.12) | +0.62 (±1.27) | 1.5 (±2.2) |
| Perioperative∆LL, high PI subgroup | - | +0.09 (±0.16) | +0.81 (±0.22) | −2.28 (±1.90) | - |
Values are given as Person correlation coefficients. Blank cells indicate that no statistically significant correlations were found. C7SVA - C7 sagittal vertical axis (mm), PI - Pelvic incidence (°), LL - Lumbar lordosis, PI-LL - PI-lumbar lordosis mismatch (°), PT - Pelvic tilt (°), T10-L2 - Sagittal Cobb angle T10-L2 (°), TK - Thoracic kyphosis (°)