RETRACTED ARTICLE: Treatment for lumbar spinal stenosis secondary to ligamentum flavum hypertrophy using percutaneous endoscopy through interlaminar approach: a retrospective study

Table 2 Comparison of surgical indicators between both groups

	Control group	Endoscopy group
Operation time (min)	92.90 ± 15.46	59.95 ± 11.90^*
the quantity of bleeding (ml)	194.30 ± 28.61	13.55 ± 2.58^*
postoperative hospital stay(d)	9.95 ± 1.96	5.15 ± 1.31^*

ISSN: 1749-799X