Table 5 Association of CSRF risk with variables showing increased risk with P ≤ 0.2

Screw density

Incomplete^a

3

28

4.6 (0.5; 46.5)

0.2

Complete

1

43

Sagittal rod contour

>60°

3

21

7.1 (0.7; 72.7)

0.1

≤60°

1

50

Crosslinks

≥2

2

14

4.1 (0.5; 31.5)

0.2

0–1

2

57

Domino and/or parallel connectors^a

Yes

2

10

6.1 (0.8; 48.4)

0.1

No

2

61

Number of crossing junctions

2

3

30

4.1 (0.4; 41.4)

0.2

0–1

1

41

Fusion to sacrum

Yes

4

41

N/A

0.2

No

0

30

Fusion to pelvis

Yes

4

20

N/A

0.05

No

0

51

Pseudarthorsis at

Yes

3

4

50.3 (4.2; 598.8)

<0.01

≥1 year follow-up

No

1

67