Gradient local anesthesia for percutaneous endoscopic interlaminar discectomy at the L5/S1 level: a feasibility study

Table 2 Comparison of the VAS score and ODI of patients before surgery, 1 week, and 1, 3, and 6 months postoperatively (x̄ ± s)

	Preoperatively	1 week postoperatively	1 month postoperatively	3 months postoperatively	6 months postoperatively
VAS score	7.3 ± 1.1	2.6 ± 0.7^a	2.2 ± 0.4^a	1.9 ± 0.4^a	1.5 ± 0.5^a
ODI	48.2 ± 6.8	32.6 ± 8.3^a	24.3 ± 7.7^a	18.4 ± 8.1^a	14.3 ± 6.7^a

ISSN: 1749-799X