Comparison of Percutaneous Endoscopic Lumbar Discectomy and Open Lumbar Surgery for Adjacent Segment Degeneration and Recurrent Disc Herniation

Table 2

Summary of clinical outcomes who underwent PELD (Group A) and open lumbar surgery (Group B).

	Group A	Group B	value
Operating time (minutes)	79.06 ± 31.05	206.44 ± 74.19	<0.0001
Total blood loss (mL)	Minimal	303.2 ± 266.62	<0.0001
Admission days (days)	1.89 ± 0.74	12.28 ± 7.58	<0.0001
Postoperative pain improvement (VAS)	3.5 ± 2.41	−0.56 ± 3.01	<0.0001