| Grade | Description |
|---|---|
| 1 | No hemorrhage detected on CT. |
| 2 | Diffuse hemorrhage detected on CT, no clots, vertical thickness less than 1 mm. |
| 3 | Clots and/or vertical thickness greater than or equal to 1 mm. |
| 4 | Diffuse or no subarachnoid hemorrhage, but with intracerebral hematoma or intraventricular clots. |
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