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Table 2 Comparison of clinical outcomes of UBE and OLM for LDH

From: Clinical comparison of unilateral biportal endoscopic technique versus open microdiscectomy for single-level lumbar discectomy: a multicenter, retrospective analysis

 

UBE

OLM

p value

Pre-op VAS back

6.22 ± 1.5

6.33 ± 1.5

0.263

Pre-op VAS leg

7.93 ± 1.0

7.98 ± 1.0

0.808

Post-op VAS back

0.93 ± 0.7

0.85 ± 0.7

0.657

Post-op VAS leg

1.28 ± 1.0

1.27 ± 1.0

0.945

Pre-op ODI

70.15 ± 1.0

71.85 ± 8.4

0.815

Post-op ODI

14.5 ± 11.9

13.95 ± 11.5

0.549

Improvement of VAS back (1 week)

4.05 ± 1.6

1.25 ± 1.7

0.001*

Improvement of VAS back (12 months)

5.28 ± 1.80

5.28 ± 1.80

0.504

Improvement of VAS leg (1 week)

5.86 ± 1.6

5.60 ± 1.5

0.326

Improvement of VAS leg (12 months)

6.65 ± 1.5

6.70 ± 1.4

0.914

Improvement of ODI back (1 week)

45.67 ± 12.3

45.18 ± 12.8

0.824

Improvement of ODI (12 months)

57.90 ± 13.5

58.17 ± 15.6

0.782

Modified MacNab score (%)

75.35 ± 0.5

68.46 ± 0.5

0.082

OT

70.15 ± 22.0

60.38 ± 15.5

0.002*

EBL

34.67 ± 16.9

140 ± 57.8

0.001*

HS

2.77 ± 1.2

6.37 ± 1.4

0.005*

Complications (%)

3 (3.7)

2 (3.3)

0.640

  1. UBE unilateral biportal endoscopy, OLM open lumbar microscopy, LDH lumbar disc herniation, VAS Visual Analogue Scale (0–10), ODI Oswestry Disability Index (0–100%), improvement, the difference between preoperative and postoperative results, modified MacNab (1, excellent; 2, good; 3, fair; 4, poor), OT operation time, EBL, estimated blood loss, HS hospital stay (days)
  2. *p < 0.05