Table 2.

Radiographic parameters of patients in the two groups

	Group L (n = 52)	Group S (n = 36)	P Value
SD (mm)
PRE	17.56 ± 5.60	16.97 ± 5.14	0.620
1 MONTH	6.85 ± 2.97*	7.11 ± 3.22*	0.692
FINAL	8.00 ± 2.97*	9.47 ± 3.23*	0.002**
SL (°)
PRE	16.36 ± 4.23	16.78 ± 4.72	0.669
1 MONTH	25.25 ± 2.84*	24.69 ± 3.20*	0.394
FINAL	25.77 ± 2.74*	23.69 ± 2.81*	0.001**
LL (°)
PRE	39.08 ± 3.64	38.08 ± 3.61	0.210
1 MONTH	45.85 ± 4.09*	44.58 ± 4.01*	0.155
FINAL	45.50 ± 4.19*	43.36 ± 3.96*	0.018**
SS (°)
PRE	36.35 ± 4.99	34.78 ± 4.72	0.142
1 MONTH	37.98 ± 4.27*	36.58 ± 4.22*	0.133
FINAL	38.15 ± 4.51*	36.39 ± 5.02*	0.089
PT (°)
PRE	18.00 ± 4.91	18.83 ± 4.18	0.409
1 MONTH	14.87 ± 4.27*	15.69 ± 3.92*	0.357
FINAL	14.62 ± 4.97*	16.86 ± 5.35*	0.047**
PI (°)
PRE	54.35 ± 3.55	53.61 ± 3.49	0.339
1 MONTH	52.85 ± 3.72*	52.28 ± 3.92*	0.493
FINAL	52.77 ± 4.20*	53.25 ± 4.78	0.619
PI-LL (°)
PRE	15.27 ± 4.10	15.53 ± 2.78	0.743
1 MONTH	7.00 ± 4.51*	7.69 ± 3.82*	0.452
FINAL	7.27 ± 4.72*	9.89 ± 4.52*	0.011 **

SD: slip degree; SL: segment lordosis; LL: lumbar lordosis; SS: sacral slope; PI: pelvic incidence; PT: pelvic tilt. PRE: preoperative, 1 MONTH: one month after surgery, FINAL: final follow-up

* Significance compared with the preoperative, P < 0.05

** Significance between the two groups, P < 0.05