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Scale for grading gastric mucosal damage[30]
| Grade | Appearance of the gastric mucosa |
| 0 | Normal |
| 1 | Slight edema and congestion |
| 2 | Edema, congestion, and bleeding |
| 3 | One or two spot erosions |
| 4 | One or two linear erosions |
| 5 | Many small and a few large erosions |
| 6 | Extensive erosions over entire mucosa |
