Comparison of microendoscopic discectomy and open discectomy for single-segment lumbar disc herniation

Table 1 Comparison of the surgical indicators in the two groups of patients (mean ± SD)

Group	Number of cases	Operation time (min)	Intraoperative blood loss (mL)	Incision length (mm)	Bed time after operation (d)	Hospital stay (d)
Observation group	48	72.64 ± 6.32	35.42 ± 8.16	2.25 ± 0.34	3.36 ± 2.18	7.25 ± 3.64
Control group	48	52.87 ± 4.34	60.25 ± 11.24	6.82 ± 0.41	4.79 ± 1.86	10.86 ± 4.25
t		17.866	12.385	59.444	3.457	4.469
P value		0.00	0.000	0.000	0.001	0.000

Table 2 Comparison of the postoperative recovery rate between the two groups of patients, n (%)

Group	Number of cases	Excellent	Good	Fair	Difference	Excellent rate
Observation group	48	40 (83.33)	5 (10.42)	3 (6.25)	0 (0.00)	45 (93.75)
Control group	48	37 (77.08)	7 (14.58)	4 (8.33)	0 (0.00)	44 (91.67)
χ²						0.154
P value						0.695

Table 3 Comparison of the visual analogue scale pain score in the two groups of patients before and after surgery (mean ± SD, min)

Group	Number of cases	Before surgery	1 d after operation	3 d after operation	1 mo after operation	6 mo after operation
Observation group	48	6.87 ± 1.56	2.75 ± 1.36	2.52 ± 1.42	2.01 ± 1.68	1.52 ± 1.24
Control group	48	7.04 ± 2.13	3.41 ± 1.76	3.13 ± 1.35	2.69 ± 1.49	2.13 ± 1.58
t		0.446	2.056	2.157	2.098	2.104
P value		0.657	0.043	0.034	0.039	0.038

Table 4 Comparison of intraoperative and postoperative complications between the two groups of patients, n (%)

Group	Number of cases	Dural rupture	Nerve root injury	Wound infection	Lumbar instability	Postoperative recurrence	Total incidence
Observation group	48	0 (0.00)	0 (0.00)	0 (0.00)	2 (4.17)	1 (2.08)	3 (6.25)
Control group	48	3 (6.25)	1 (2.08)	1 (2.08)	4 (8.33)	2 (4.17)	11 (22.92)
χ²							5.352
P value							0.021