Table 4.

Radiologic outcomes

Radiologic characteristics (No, %)			Group 1	Group 2	P value
Radiologic signs	Bony union	Lenke A	179 (98.3 %)	109 (96.4 %)	0.35
		Lenke B	2 (1.0 %)	2 (1.7 %)
		Lenke C	1 (0.5 %)	2 (1.7 %)
		Lenke D	0 (0 %)	0 (0 %)
	Halo sign		22 (12.0 %)	17 (15.0 %)	0.383
	Metal failure	Screw breakage	3 (1.6 %)	5 (4.4 %)	<0.001
		Dissociation	0 (0 %)	2 (1.7 %)
		Rod breakage	0 (0 %)	1 (0.8 %)
Changes of adjacent segments		Disc space narrowing	23 (12.6 %)	27 (23.8 %)	<0.001
		Traction spur	21 (11.2 %)	25 (22.1 %)
		End plate sclerosis	21 (11.2 %)	22 (19.4 %)
		Vacuum phenomenon	8 (3.9 %)	9 (7.9 %)
		Total	73 (40.1 %)	83 (73.4 %)