Optimal Correction of Adult Spinal Deformities Requires Restoration of Distal Lumbar Lordosis

Table 1

Preoperative values of radiographic parameters between “aligned” and “not aligned” groups.

Preoperative	Aligned	Not aligned	value
Pelvic incidence (°)	52	61	0.009
Pelvic tilt (°)	26	33	0.001
L1-S1 lumbar lordosis (°)	34	23	0.004
L1-L4 PLL (°)	1.5	0.8	0.9
L4-S1 DLL (°)	33.3	28.3	0.254
PI-LL (°)	16	34	<0.001
T4-T12 thoracic kyphosis (°)	37	25	0.008
Sagittal vertical axis (mm)	71	91	>0.05