Table 5.

Comparison between the more relevant series in the literature^* and present study.

	Study design	Patients (No.)	Mean Age (Years)	Gender (Women/ Men)	Type of Spondylolisthesis	Surgical Technique	Mean Follow up (Years)	Total Follow up Rate (%)	Clinical Satisfaction (No.patients (%))	Fusion Rate (No.patients (%))	Major Complications** (No.patients (%))
Ekman et al.45	Prospective	86	40	53/33	Isthmic	PLIF +PLF	2	98%	74/86 (86%)	---	12/86 (13.9%)
Periasamy et al.62	Retrospective	75	48.7	30/45	Isthmic+Degen-erative	PLIF +PLF	2.4	---	64/75 (85.3%)	71/75 (94.6%)	10/75 (13.3%)
Abdu et al.63	Prospective	63	59.7	50/13	Degenerative	PLIF +PLF	4	73%	---	47/54 (87%)	9/63 (14.2%)
Kim et al.47	Prospective	48	53.4	35/13	Isthmic+Degen-erative	PLIF +PLF	3	---	41/48 (85.4%)	46/48 (96%)	3/48 (6.2%)
Suck et al.43	Retrospective	36	---	---	Isthmic	PLIF +PLF	3.3	100%	35/36 (97%)	36/36 (100%)	2/36 (5.5%)
Cuningham et al. 54	Prospective	31	43	17/14	Isthmic	PLIF +PLF	6.33	77%	---	---	---
Madam et al.44	Retrospective	23	41.1	9/14	Isthmic	PLIF +PLF	2.4	100%	23/23 (100%)	23/23 (100%)	2/23 (8.6%)
Wang et al.50	Retrospective	21	52.7	---	Isthmic+Degen-erative	PLIF +PLF	1	100%	19/21 (90%)	---	4/21 (19%)
La Rosa et al.56	Prospective	17	57.2	---	Isthmic	PLIF +PLF	2	100%	15/17 (88.2%)	17/17 (100%)	---
Present Study	Prospective	36	57.1	22/14	Isthmic+Degen-erative	PLIF +PLF	1	100%	34/36 (94.5%)	33/36 (91.6%)	5/36 (13.8%)

^*43–45,⁴⁷,⁵⁰,⁵⁴,⁵⁶,⁶³ are comparative studies between two or more surgical techniques. Only are shown PLIF+PLF Groups.

^**Major complications: wound haematoma, wound infection, cerebrospinal fluid fistula, permanent or transient leg pain, deep vein thrombosis, pulmonary embolus.