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Table 2:

Individual predictors of tortuosity

Case No.Radiographic Factor
1 Out Axial Plane2 Out/In Axial Plane3 Deviation within Axial Plane4 Curvature Sagittal Plane5 Lack of Coronal Congruity6 Dilation Subarachnoid SpaceMean Total Score
1○○○○○○○○○○○○n/a○○○
2○○•••○○○••••○○○○○○2.3
3○○○○•••••○••••••••4.3
4••○○○••••○••••••••4.7
5○○○○○○○○○○○○○○○○○○0
6••○○○••••••••○••○•4.3
7○○○○••○•○○••○•○○••2.7
8○○○○○○○••○○○n/a○○○
9○○○○○○○○○○○○○○○○○○0
10○○○○○○○○○○○○n/a○○•
11○○○○••••••••••••••4.7
12○○○○••••••••••••••4.7
13○•○•○•••••••••••••5.0
14○•○○○•○•••••○•○••○3.3
15○○○○○○○○○○○○○○○•••1.0
16○○○••••○○••••○••••4.0
17○○○○•••••••○••••••4.3
18○○○•••••○••••••••○4.3
19○○○•••○○○○••○○○○•○2.0
20•••○○○•••○○○○•○○○○2.3
21•••○○○○○○○○•○○○○○○1.3
22•••○○○○○○n/a○○○•○○
23○••○○•○○○•••○○○○○○2.0
24○○○○○••••○○•○•○•○○2.3
25○○○○••••••○•○••○○○3.0
26○○○••••○○•••••••○○3.7
27○○○○○○○○○○○○○○○○○○0
28•••○○○○○○○○○○○○•○○1.3
Column Perfect Agree22/28 = 79%15/28 = 54%21/28 = 75%19/27 = 70%18/25 = 72%18/28 = 64%
  • Note:—Radiologist decision: ○, factor absent; •, factor present; n/a, not available for review.