Table 2.

The preoperative and last follow-up data

Parameters	Pre-operative	Post-operative	p-value
Konstam’s angle(°)	88.1	18.5	<0.001
TK(°)a	76.9	31.1	<0.001
PI-LL(°)b	78.7	5.7	<0.001
PT(°)b	43	14.3	<0.001
SVA(cm)	5.3	2.4	<0.001
VAS	7.1	1.8	<0.001
ODI(%)	65.8	20.2	<0.001

TK thoracic kyphosis, PI pelvic incidence, LL lumbar lordosis, PT pelvic tilt, SVA sagittal vertical angle, VAS visual analogue score, ODI oswestry disability index

^an = 11, measured when the apical vertebra was located at the thoracic level;^bn = 7, measured when the apical vertebra was located at the lumbar level