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| Scorea | Clinical feature |
|---|---|
| 0 | Intact mucosa |
| 1 | Tear of mucosa only |
| 2 | Tear of mucosa and submucosa only |
| 3 | Tear through mucosa, submucosa, and muscular layers; serosa remains intact. |
| 4 | Tear through all rectal wall layers. |
The classification was based on a previous study (Haskell, 2004).
