A Novel Nonpedicular Screw-Based Fixation in Lumbar Spondylolisthesis

Table 1

Demographic data in patients undergoing PLIF with IFD.

Patients	IFD
Number	39
Sex (male : female)	6 : 33
Age	52–79 (mean 66.0)
Spondylolisthesis level	Number of cases
L3-4	9
L4-5	27
L3-4-5	2
L2-3 and L4-5	1