Table 4:

Clinical outcomes and complications.

Clinical outcomes	Group A	Group B	P-value
Number of patients	81	75
Pre-operative VAS	9.1 (+/3.2)	9.4 (±4.1)	0.875
Post-operative VAS	8.9 (±4.2)	9.3 (±3.7)	0.761
1 month FU VAS	3.2 (±1.9)	7.3 (±2.1)	0.024
6 months FU VAS	3.7 (±1.2)	4.2 (±1.9)	0.652
12 months FU VAS	4.6 (±1.5)	2.3 (±0.9)	0.045
24 months FU VAS	4.5 (±1.8)	1.9 (±1.4)	0.029
Pre-operative ODI	82.7 (±14.2)	84.1 (±16.3)	>0.05
Post-operative ODI	72.8 (±18.3)	77.6 (±19.9)	>0.05
1 month FU ODI	54.2 (±12.6)	66.7 (±15.1)	>0.05
6 months FU ODI	32.4 (±11.2)	34.1 (±10.3)	>0.05
12 months FU ODI	29.3 (±9.3)	18.1 (±8.2)	0.039
24 months FU ODI	27.3 (±10.1)	16.7 (±9.1)	0.007
Complications
Screws loosening	5 (6.2%)	1 (1.3%)	0.021
Implant failure	3 (3.7%)	-	0.001
Wound infection	1 (1.2%)	1 (1.3%)	0.233
Chronic pain	11 (13.6%)	4 (5.3%)	0.024

FU: Follow-up, ODI: Oswestry disability index, VAS: Visual analog scale