Efficacy of lumbar decompression under large-channel spinal endoscope in elderly patients with segmental lumbar spinal stenosis

Table 2 Comparison of surgical conditions (\(\overline{x}\) ± s)

Parameter	Study group (n = 34)	Control group (n = 34)	t/χ²	p
Surgical time (min)	112.81 ± 23.28	132.39 ± 22.18	3.551	< 0.001
Intraoperative bleeding volume (mL)	20.17 ± 3.91	100.18 ± 18.93	24.136	< 0.001
Postoperative drainage volume (mL)	103.28 ± 19.76	139.91 ± 19.87	7.622	< 0.001
Hospital stay (d)	6.18 ± 1.01	11.93 ± 1.31	20.269	< 0.001

ISSN: 1749-799X