Table 3.

Sagittal balance parameters.

Parameter	Record time	Group A	Group B	P value
SL	Preop	17.51 ± 3.60	17.45 ± 4.21	0.298
	Postop 3d	24.22 ± 3.78	24.52 ± 2.59	0.076
	Postop 3m	23.17 ± 3.78	24.05 ± 2.95	0.368
	Postop 3y	24.24 ± 4.51	25.52 ± 3.67	0.374
LL	Preop	37.97 ± 3.14	38.27 ± 4.14	0.057
	Postop 3d	44.90 ± 4.24	45.20 ± 4.73	0.156
	Postop 3m	43.56 ± 4.67	45.05 ± 4.63	0.405
	Postop 3y	41.41 ± 4.27	44.25 ± 4.17	0.908
PI	Preop	54.09 ± 4.05	54.95 ± 4.28	0.680
	Postop 3d	58.65 ± 4.00	55.08 ± 5.22	0.293
	Postop 3m	56.29 ± 4.01	54.83 ± 5.66	0.092
	Postop 3y	51.24 ± 3.64	52.60 ± 6.07	<0.001
SS	Preop	37.46 ± 4.16	38.17 ± 5.38	0.072
	Postop 3d	37.37 ± 4.24	36.37 ± 5.07	0.053
	Postop 3m	37.31 ± 4.09	35.92 ± 4.84	0.060
	Postop 3y	34.51 ± 5.61	34.72 ± 6.53	0.291
PT	Preop	18.66 ± 4.70	19.55 ± 3.77	0.072
	Postop 3d	15.92 ± 5.03	16.02 ± 4.79	0.593
	Postop 3m	16.02 ± 5.07	16.02 ± 5.07	0.482
	Postop 3y	18.88 ± 5.63	17.35 ± 3.89	0.018

Preop, preoperation; Postop 3d, three days after operation; Postop 3m, three months after operation; Postop 3y, three years after operation; LL, lumbar lordosis; SL, segmental lordosis; PI, pelvic incidence; PT, pelvic tilt; SS, sacral slope. Font bold indicates statistical difference, P < 0.05.