Learning curve of trans-sacral epiduroscopic laser decompression in herniated lumbar disc disease

BMC Surgery

Table 5 Radiological outcomes between the two groups (independent t-test)

	Early group (n = 20)	Late group (n = 62)	OR or difference	95% CI	P value
Disc height (mm)
Preoperative	17.31 ± 3.74	18.49 ± 1.85	1.18 ± 0.89	− 2.03–1.93	0.466^†
6 months	17.24 ± 1.65	18.25 ± 1.42	1.01 ± 1.55	− 2.34–1.91	0.260^†
Segmental angle (°)
Preoperative	7.90 ± 5.81	8.82 ± 4.54	0.92 ± 1.67	− 1.32–2.48	0.586^†
6 months	7.24 ± 4.21	8.32 ± 4.15	1.08 ± 1.826	− 4.88–2.72	0.560^†
Range of motion (°)
Preoperative	4.86 ± 3.99	6.64 ± 4.01	1.78 ± 1.41	− 4.63–1.07	0.214^†
6 months	3.19 ± 2.72	5.82 ± 4.75	2.63 ± 2.093	− 6.90–1.63	0.217^†
Total lumbar lordosis (°)
Preoperative	33.31 ± 15.95	34.92 ± 16.05	1.61 ± 5.22	− 12.21–8.98	0.759^†
6 months	34.74 ± 7.35	36.47 ± 12.40	1.73 ± 4.81	− 11.73–8.26	0.722^†

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