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Table 4 Radiologic outcomes

From: Long-term outcomes of long level posterolateral fusion in lumbar degenerative disease: comparison of long level fusion versus short level fusion: a case control study

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 %)