Table 2.

Pre- and postoperative spinopelvic sagittal alignment in 240 consecutive patients

Variable	Preoperative	6 mo	1 yr	2 yr	p-value (preoperative–1 yr)
Sagittal vertical axis (mm)	108.3±90.3	43.8±50.5	56.8±62.7	66.2±68.9	<0.0001
Pelvic incidence (°)	52.4±11.9	52.4±11.4	53.2±12.3	53.0±12.3	Not significant
Pelvic tilt (°)	31.8±13.7	21.4±10.0	24.7±10.4	24.9±11.1	<0.0001
Sacral slope (°)	20.5±13.9	30.4±9.4	28.8±10.7	28.6±10.8	0.0004
Lumbar lordosis (°)	19.1±26.2	41.9±13.7	40.6±15.4	39.9±17.5	<0.0001
Thoracic kyphosis (°)	27.5±21.0	33.8±12.3	39.2±14.5	40.9±17.4	<0.0001
T1 pelvic angle (°)	35.3±19.1	19.5±10.4	23.5±13.2	24.4±14.3	<0.0001

Values are presented as mean±standard deviation.