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Table 3 Showing comparison of VAS for back pain during follow-up between the two groups: transforaminal endoscopic discectomy group (TED) and microdiscectomy group (MD)

From: Percutaneous full-endoscopic transforaminal discectomy versus open microdiscectomy in the treatment of lumbar disc herniation: randomized controlled trial

VAS back pain

(mean ± SD)

TED group

MD group

p-value*

Significance

Preoperative

5.65 ± 0.77

5.42 ± 0.88

0.264

NS

2 weeks postoperative

3.37 ± 0.63

4.07 ± 0.52

 < 0.001

S

3 months postoperative

2.25 ± 0.68

3.45 ± 0.88

 < 0.001

S

6 months postoperative

2.24 ± 0.57

2.56 ± 0.71

0.051

NS

12 months postoperative

1.87 ± 0.64

2.09 ± 0.73

0.202

NS

  1. S; significant, NS; non-significant
  2. *Calculated by Student’s t test