Table 1.

Patient demographic data

	Age (years)	Gender	Diagnosis	Operation
Patient 1	62	Male	L 45 listhesis	L 45 interbody fusion
Patient 2	55	Male	L 345 listhesis	L 345 interbody fusion
Patient 3	47	Male	L 45 listhesis	L 45 interbody fusion
Patient 4	60	Female	L 345 listhesis	L 345 interbody fusion
Patient 5	52	Female	L 45 listhesis	L 45 interbody fusion
Patient 6	54	Female	L 45 listhesis	L 45 interbody fusion

L Lumbar, listhesis Spondylolisthesis