Figure 3. Responder rates at 3 months, 6 months, 12 months and the last visit in patients aged <18, 18–29, 30–39, 40–49, 50–59, 60–69 and ≥70 years. Response was defined as ≥50% seizure frequency reduction from baseline. Statistical comparisons were conducted using the Chi-squared test. Reproduced with permission from Eisai