Unadjusted 12-month seizure recurrence risks at time points after breakthrough seizure: risk (%, 95% CI)
| Time seizure free after breakthrough seizure (months) | Number at risk | Risk of seizure in following 12 months. % |
| 6 | 119 | 32 (28 to 36) |
| 9 | 99 | 24 (21 to 27) |
| 12 | 80 | 17 (15 to 19) |