Table 2.

Comparison of general data between ELLD and EPLD

	Number	Follow-up time (months)	Age (years)	Sex ratio (M: F)	Course of disease (months)	The direction of herniation (left:right)	Operation time (min)	Intraoperative fluoroscopy times	Post-operative hospital stay (days)
ELLD	54	20.81 ± 4.08	47.78 ± 13.96	31:23	6.74 ± 4.06	13:41	89.09 ± 21.83	7.33 ± 1.64	1.17 ± 0.37
EPLD	22	19.27 ± 2.83	53.27 ± 13.84	9:13	7.50 ± 4.46	10:12	77.55 ± 22.86	2.73 ± 1.31	1.36 ± 0.79
t		1.617	1.560	1.707	0.717	3.386	2.063	12.823	1.120
P		0.110	0.123	0.191	0.475	0.066	0.043	0.000	0.274