Table 3.

Various changes after lumbar PSO in SI patients

	SI (n=114)	After PSO
C7 SVA (cm)	14.2±6.03	2.6±5.17
TK (T5–T12) (°)	27±19.2	35±15.1
LL (T12–S1) (°)	−15±20.3	−52±14.5
Sacral slope (°)	23±15.8	34±10.5
Pelvic tilt (°)	32±10.7	21±9.1
TK+LL+PI (°)	67±18.3	38±15.3
TK+LL (°)	12±23	−17±23

PSO: pedicle subtraction osteotomy, SI: sagittal imbalance, SVA: sagittal vertical axis, TK: thoracic kyphosis, LL: lumbar lordosis, PI: pelvic incidence