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Table 4 Interbody fusion levels number comparison

From: Risk factors for upper adjacent segment degeneration after multi-level posterior lumbar spinal fusion surgery

Interbody fusion levels

Group A (nā€‰=ā€‰22)

Group B (nā€‰=ā€‰49)

Not fused

7

6

L2ā€“4

0

2

L2ā€“5

0

10

L3ā€“5

9

13

L3ā€“5 to S1

0

8

L4ā€“5

3

5

L4ā€“5 to S1

3

4

L5ā€“S1

0

1