Table 2. Comparisons of features and calculation of CE scores.
Lewis score | Capsule Endoscopy Crohnʼs Disease Activity Index | Capsule Endoscopy – Crohnʼs Disease score | |||||
Parameter | Number | Longitudinal extent | Descriptors | Parameter | Score | Parameter | Score |
Villous appearance (worst-affected tertile) |
|
|
|
Inflammation |
|
Number of ulcers |
|
Ulcer (worst-affected tertile) |
|
|
|
Extent of the disease |
|
Size of largest ulcer |
|
Stenosis (whole study) |
|
|
|
Narrowing (stricture) |
|
Surface involved |
|
Stenosis |
|
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Lewis score = Score of the worst-affected tertile [(villous parameter x extent x descriptor) + (ulcer parameter x extent x descriptor)] + (stenosis number x ulcerated x traversed).
Capsule Endoscopy Crohnʼs Disease Activity Index = proximal (inflammation x extent + narrowing) + distal (Inflammation x extent + narrowing).
Capsule Endoscopy – Crohn’s Disease score = 1st + 2nd + 3 rd tertile (number of ulcer + size + surface + stenosis).