Table 2: Seizure outcomes and retention rates at 1, 3, 6, and 12 months.

1 month3 months6 months12 months

Responders
 Seizure-free1019138
 >90% reduction1511104
 50–90% reduction13710
Nonresponders
 <50% reduction11210
 Not changed3420
 Increased2120
Response rate70.4% (38/54)68.5% (37/54)44.4% (24/54)22.2% (12/54)
Retention rate90.7% (49/54)81.5% (44/54)53.7% (29/54)22.2% (12/54)