Non-convulsive status epilepticus is not a benign entity: The etiology determines mortality and its form of presentation predicts the functional prognosis.

Among nonconvulsive status epilepticus patients, 35 fulfilled Salzburg criterion IIA and 36 criterion IIB.

Hospital mortality was similar in convulsive status epilepticus and nonconvulsive status epilepticus (34%vs 32%; p = 0.869).

Mortality was independently associated with age, anoxic encephalopathy and super-refractory status, but not nonconvulsive status epilepticus.

Nonconvulsive status epilepticus independently predicted poor functional outcome.