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Table 3 Comparison between the 2 study groups regarding the preoperative and the postoperative VAS-B values

From: Minimally invasive surgical management of symptomatic lumbar disc herniation: can the endoscope replace the microscope?

 

MD

ED

p*

Mean

 ± SD

Mean

 ± SD

Pre VAS-B

6.35

1.14

8.6

1.16

0.0001

VAS-B 1 month Post

2.45

0.51

1.85

1.2

0.204

VAS-B 6 months Post

1.65

0.49

1.7

1.38

0.87

VAS-B 12 months Post

1.20

0.52

1.8

1.32

0.066

  1. MD microscopic discectomy, ED endoscopic discectomy, Pre preoperatively, VAS-B Visual analogue scale for back pain, Post postoperatively), SD (standard deviation)
  2. *Student t test