Hybrid surgery of percutaneous transforaminal endoscopic surgery (PTES) combined with OLIF and anterolateral screws rod fixation for treatment of multi-level lumbar degenerative diseases with intervertebral instability

Table 2 Variations of measured parameters before and after operation

	Pre-op	Post-op	1 month	2 months	3 months	6 months	1 year	2 years
Back pain VAS	6 (4–10)	1 (0–3)*	0 (0–3)*	0 (0–3)*	0 (0–3)*	0 (0–3)*	0 (0–3)*	0 (0–3)*
Leg pain VAS	9 (7–10)	1 (0–4)*	0 (0–2)*	0 (0–2)*	0 (0–2)*	0 (0–2)*	0 (0–2)*	0 (0–2)*
ODI(%)	Before operation			2 years after operation
	66.78 ± 8.46			13.10 ± 5.81
	Before operation		Immediately after operation				2 years after operation
Intervertebral space height(mm)	9.77 ± 1.58		13.03 ± 1.54*				12.38 ± 1.52*
Lumbar lordotic angle(°)	40.21 ± 9.51		48.70 ± 8.37*				46.07 ± 8.44*
Operative segmental lordotic angle(°)	15.19 ± 3.05		20.61 ± 3.09*				19.14 ± 2.96*

VAS is expressed as the median(minimum–maximum) and other variations are expressed as the mean ± SD. All parameters were significantly different between preoperation and postoperation (P < 0.001). There was no significant difference among each time point after operation
*P < 0.001 versus the parameter before surgery

ISSN: 1749-799X