The ILAE epilepsy surgery outcome classification3
| Outcome classification | Definition |
| 1 | Seizure-free, no auras |
| 2 | Simple partial seizures/auras only |
| 3 | One to three seizure days per year+/− auras |
| 4 | Four seizure days per year to a 50% reduction in seizure days per year+/−auras |
| 5 | Less than 50% reduction in seizure days to a 100% increase+/−auras |
| 6 | A more than 100% increase in seizure days+/−auras |
ILAE, The International League against Epilepsy.