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

Table 5 Sagittal balance of the lumbar spine and lumbar—pelvic parameters

Indicator	Time	Study group (n = 34)	Control group (n = 34)	t	P
DH	Before surgery	6.53 ± 0.37	6.49 ± 0.41	0.422	0.674
DH	3 months after surgery	7.76 ± 0.43	7.63 ± 0.39	1.306	0.196
LASD	Before surgery	20.37 ± 2.42	20.41 ± 0.45	0.379	0.706
LASD	3 months after surgery	39.48 ± 3.48	38.99 ± 3.43	0.585	0.561
SS	Before surgery	32.37 ± 2.28	32.29 ± 2.32	0.143	0.886
	3 months after surgery	30.23 ± 2.22	30.68 ± 2.23	0.834	0.407
PT	Before surgery	17.38 ± 2.19	17.33 ± 2.25	0.093	0.926
	3 months after surgery	18.73 ± 2.23	18.21 ± 2.21	0.966	0.338
LL	Before surgery	42.87 ± 2.76	42.92 ± 2.73	0.075	0.940
	3 months after surgery	36.65 ± 2.71	36.86 ± 2.69	0.321	0.750

PI, pelvic incidence angle; LL, lumbar lordosis angle; DH, intervertebral height; PT, pelvic inclination angle; SS, oblique angle; LASD, L1 plumb line distance from S1

ISSN: 1749-799X