Table 3 Brantigan and Steffee spinal fusion grades at 3 and 12 months after surgery.

From: Comparison of clinical effects of endoscopic powered osteotome and endoscopic powered drill for UBE-TLIF surgery

Follow-up

Group

BD(n = 71)

BO(n = 56)

H

P

Grade

A

B

C

D

E

A

B

C

D

E

  

3 months

L3/4(n = 6/2)

0

2

4

0

0

0

0

1

1

0

5.549

0.018

L4/5(n = 41/35)

0

6

25

9

0

0

0

20

15

0

L5/S1(n = 25/19)

0

2

17

6

0

0

2

13

4

0

total

0

10

46

15

0

0

2

34

20

0

12 months

L3/4(n = 6/2)

0

0

1

3

1

0

0

1

1

0

3.285

0.070

L4/5(n = 41/35)

0

0

4

25

12

0

0

1

11

21

L5/S1(n = 25/19)

0

0

2

14

9

0

0

1

8

10

total

0

0

7

42

22

0

0

3

19

21

  1. Kruskal–Wallis H test: Comparing the fusion levels between groups. H: Test statistic, P: Significance probability value, with P ≤ 0.05 indicating that the difference is statistically significant.
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