. 2023 Feb 9;14(6):1760–1770. doi: 10.1177/21925682231155846

Table 5.

Comparison between groups: the changes in spondylolisthesis.

	STL (n = 8)		P-value^a	FEL (n = 10)		P-value^a
	Preoperative	Postoperative	P-value^a	Preoperative	Postoperative	P-value^a
Slippage (mm)	4.0 ± 3.5	7.6 ± 3.5	.028	5.7 ± 1.6	4.7 ± 1.6	.074
Difference	3.5 ± 4.5			−1.0 ± 1.4		0.009‡

^aWilcoxon signed rank test was used for comparing changes between pre and postoperative score within groups.

Mann–Whitney U test was used for comparing changes within groups.

Abbreviations: STL, subtotal laminectomy; FEL, full-endoscopic laminotomy.