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Mayo endoscopic subscore
| Endoscopic findings | Score |
|---|---|
| No or inactive findings | 0 |
| Mild (erythema, decreased vascular translucency, mild fragility) | 1 |
| Moderate (marked erythema, loss of vascular translucency, fragility, erosions) | 2 |
| Severe (spontaneous bleeding, ulcers) | 3 |
