ILAE Outcome Scale

Class 1

Completely seizure-free; no auras.

Class 2

Only auras; no other seizures.

Class 3

1 to 3 seizure days per year; with/without auras.

Class 4

4 seizure days per year to 50% reduction of baseline seizure days; with/without auras.

Class 5

Less than 50% reduction of baseline seizure days; with/without auras.

Class 6

More than 100% increase of baseline seizure days; with/without auras.