FIGURE 1.

Time to nth seizure during the maintenance period of the levetiracetam trial (post hoc efficacy population). A, Overall. B, Stratum 1: 1‐week baseline. C, Stratum 2: 2‐week baseline. D, Stratum 3: 4‐week baseline. Kaplan‐Meier estimates of the percentage of patients yet to reach their nth seizure. This analysis is based on the full 10‐week maintenance period of the levetiracetam trial; each patient's 10‐week maintenance period may have been shorter or longer based on visit windows. Patients who discontinued during titration were analyzed as efficacy failures on day 1 of the maintenance period, and patients who discontinued during the maintenance period without reaching their nth seizure were censored