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. 2015 Jun 9;9:22. doi: 10.14444/2022

Table 4.

Radiological Results after 1 year of follow up.

	Isthmic Spondylolisthesis (No. levels (%))	Degenerative Spondylolisthesis (No. levels (%))	Total (No. levels (%))
PLIF (Brantigan et al ¹¹)
Level 5	15/15 (100%)	21/23 (91.3%)	36/38 (94.7%)
Level 4	0/15 (0%)	2/23 (8.7%)	2/38 (5.3%)
Level 3	0/15 (0%)	0/23 (0%)	0 (0%)
Level 2	0/15 (0%)	0/23 (0%)	0 (0%)
Level 1	0/15 (0%)	0/23 (0%)	0 (0%)
IPLF (Lenke et al ¹²)
Grade A	14/15 (93.3%)	20/23 (87%)	34/38 (89.4%)
Grade B	1/15 (6.7%)	3/23 (13%)	4/38 (10.6%)
Grade C	0/15 (0%)	0/23 (0%)	0 (0%)
Grade D	0/15 (0%)	0/23 (0%)	0 (0%)