Table 4.

Changes in radiologic parameters between postoperative day 1 and 2 years

	Group A	p	Group B	p
SL	2.0 ± 5.4	0.707	2.8 ± 2.1	0.003*
Disc height	0.7 ± 3.6	0.558	3.2 ± 1.7	0.003*
Screw angle	0.9 ± 3.3	0.385	3.2 ± 2.5	0.005*
L4 Screw angle	–0.5 ± 2.2	0.482	1.3 ± 1.7	0.044*
L5 Screw angle	1.1 ± 5.4	0.501	1.8 ± 1.8	0.019*

SL: segmental lordosis, mean ± standard deviation,

^*p < 0.05.