Foraminoplasty at the Tip or Base of the Superior Articular Process for Lateral Recess Stenosis in Percutaneous Endoscopic Lumbar Discectomy: A Multicenter, Retrospective, Controlled Study with 2-Year Follow-Up

Table 3

Changes of preoperative and postoperative VAS scores of sciatica .

Time point	Pre-operation	1 months postoperatively	3 months postoperatively	6 months postoperatively	1 year postoperatively	2 years postoperatively
Group A	7.1±0.8	2.2±0.8	2.0±0.5	1.8±0.5	1.6±0.3	1.5±0.3
Group B	7.0±0.9	2.0±0.7	1.9±0.4	1.7±0.4	1.5±0.4	1.4±0.2

VAS:  visual analogue scale.