Subarachnoid hemorrhage clinical grading scales
| Grade | Hunt and Hess | World Federation of Neurological Surgeons |
|---|---|---|
| 0 | Intact aneurysm | |
| 1 | Asymptomatic or mild headache | Glasgow Coma Scale (GCS) 15 |
| 1a | Fixed neurological deficit without meningeal or brain reaction | |
| 2 | Moderate to severe headache, cranial nerve palsy, nuchal rigidity | GCS 13–14 without motor deficit |
| 3 | Lethargy, confusion, mild focal deficit | GCS 13–14 with motor deficit |
| 4 | Stupor, hemiparesis, early decerebrate posturing | GCS 7–12 without or with motor deficit |
| 5 | Coma, decerebrate posturing, moribund appearance | GCS 3–6 without or with motor deficit |