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Table 2 Comparison of outcome indicators between groups

From: Unilateral biportal endoscopic lumbar interbody fusion (ULIF) versus endoscopic transforaminal lumbar interbody fusion (Endo-TLIF) in the treatment of lumbar spinal stenosis along with intervertebral disc herniation: a retrospective analysis

Outcome indicators

ULIF(n = 35)

Endo-TLIF(n = 34)

Effect value (95% CI)

P-value

Surgical time (\(\bar{x}\) ± s, min)

112.78 ± 19.29

174.58 ± 18.41

61.80 (52.90, 70.70)

< 0.001

Intraoperative bleeding volume (\(\bar{x}\) ± s, mL)

97.71 ± 11.15

101.73 ± 9.74

4.02 (-0.92, 8.97)

0.116

Hospitalization time (\(\bar{x}\) ± s, d)

6.81 ± 2.21

5.13 ± 2.03

-1.68 (-2.69, -0.68)

0.002

Intervertebral space bone graft area (\(\bar{x}\) ± s, mm2)

3.63 ± 0.44

2.20 ± 0.62

-1.43 (-1.68, -1.18)

< 0.001

Intervertebral fusion 6 months after surgery (yes,cases (%))

31 (88.57)

29 (85.29)

0.75 (0.18, 3.06)

0.705

Intervertebral fusion at 12 months after surgery (yes/cases (%))

33 (94.29)

32 (94.12)

0.97 (0.13, 7.31)

0.978

Postoperative intervertebral height (\(\bar{x}\) ± s, mm)

10.49 ± 1.30

10.87 ± 1.78

0.38 (-0.36, 1.11)

0.316

Postoperative spinal canal area (\(\bar{x}\) ± s, cm2)

1.67 ± 0.47

1.71 ± 0.47

0.037(-0.184, 0.259)

0.7415

Change in spinal canal area (\(\bar{x}\) ± s, cm2)

1.02 ± 0.47

1.04 ± 0.49

0.023(-0.205, 0.252)

0.8417

Change in intervertebral space height (\(\bar{x}\) ± s, mm)

2.29 ± 1.42

2.38 ± 1.60

0.09 (-0.62, 0.80)

0.808

VAS leg pain score 1 week after surgery M (Q1,Q3)

3.00(2.00,3.00)

2.00(2.00,3.00)

-0.14 (-0.50, 0.21)

0.439

VAS leg pain score 3 months after surgery M (Q1,Q3)

2.00(1.00,2.00)

1.00(1.00,2.00)

-0.26 (-0.57, 0.05)

0.087

VAS leg pain score 12 months after surgery M (Q1,Q3)

1.00(1.00,2.00)

1.00(1.00,2.00)

-0.05 (-0.37, 0.28)

0.760

VAS low back pain score 1 week after surgery M (Q1,Q3)

2.00(2.00,3.00)

2.00(2.00,3.00)

0.11 (-0.22, 0.44)

0.746

VAS low back pain score 3 months after surgery M (Q1,Q3)

2.00(1.00,2.00)

2.00(1.00,2.00)

0.09 (-0.27, 0.44)

0.499

VAS low back pain score 12 months after surgery M (Q1,Q3)

1.00(1.00,2.00)

1.00(1.00,2.00)

0.05 (-0.27, 0.37)

0.899

VAS score for back pain : VAS score for leg pain 1 week after surgery M (Q1,Q3)

0.86(0.67,1.00)

1.00(0.67,1.50)

0.189(-0.054, 0.432)

0.283

VAS score for back pain : VAS score for leg pain 3 months after surgery M (Q1,Q3)

1.00(0.50,1.00)

1.00(0.50,2.00)

0.182(-0.134, 0.499)

0.190

VAS score for back pain : VAS score for leg pain 12 months after surgery M (Q1,Q3)

1.00(0.50,1.00)

1.00(0.50,1.00)

-0.028(-0.312, 0.257)

0.722

ODI index 1 week after surgery (\(\bar{x}\) ± s)

18.17 ± 4.35

19.09 ± 3.62

0.97(-2.84, 1.01)

0.345

ODI index 6 months after surgery (\(\bar{x}\) ± s)

8.14 ± 2.68

8.06± 2.70

0.65 (-1.21, 1.38)

0.897

ODI index 12 months after surgery (\(\bar{x}\) ± s)

7.17 ± 3.29

7.15 ± 2.80

0.74(-1.44, 1.49)

0.974

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BMC Musculoskeletal Disorders

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