Learning Curve and Clinical Outcome of Biportal Endoscopic-Assisted Lumbar Interbody Fusion

Table 3

Comparison of improvement in clinical outcome scores divided by group. Statistical analysis by two sample -test (VAS: Visual Analog Scale; ODI: Oswestry Disability Index; pre: preoperative; PO: postoperative; w: weeks; m: months, value < 0.05).

Variables		Group A	Group B	value
VAS leg	Pre-PO 2 w			0.001
	Pre-PO 2 m			0.122
	Pre-final			0.255
VAS back	Pre-PO 2 w			0.637
	Pre-PO 2 m			0.349
	Pre-final			0.726
ODI	Pre-PO 2 w			0.131
	Pre-PO 2 m			0.141
	Pre-final			0.431