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Table 5 Hunt and Hess Classification [27, 28]

From: Subarachnoid hemorrhage in the emergency department

Grades Description Mortality
1 Asymptomatic or minimal headache and slight nuchal rigidity 3%
2 Moderate or severe headache, nuchal rigidity, no neurologic deficit other than cranial nerve palsy 3%
3 Drowsiness, confusion, or mild focal deficit 9%
4 Stupor, moderate to severe hemiparesis, possibly early decerebrate rigidity, and vegetative disturbance 24%
5 Deep coma, decerebrate posturing, moribund appearance 71%