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Table 2 Fixed vertebrae number comparison

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

Fixed vertebrae

Group A (n = 22)

Group B (n = 49)

T11–L3

2

0

T11–L4

1

0

T11–L5

1

0

T12–L5

3

1

L1–L5

2

4

L1–S1

1

1

L2–L5

9

26

L2–S1

1

2

L3–S1

2

15

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X