Table 2.

The changes in convulsive seizure frequency compared to baseline and the daily dosage of PB, N (%) or median (P25, P75).

	The first year (n = 1,210)	The third year (n = 968)	The fifth year (n = 845)	The seventh year (n = 358)	The tenth year (n = 59)
Seizure-free	548 (45.3%)	722 (74.6%)	703 (83.2%)	320 (89.4%)	57 (96.6%)
≥50% reduction in seizure frequency (excluded seizure-free)	345 (28.5%)	144 (14.9%)	86 (10.2%)	21 (5.9%)	1 (1.7%)
<50% reduction in seizure frequency	317 (26.2%)	102 (10.5%)	56 (6.6%)	17 (4.7%)	1 (1.7%)
Daily dosage of PB (mg/day)	90 (60, 120)	90 (60, 120)	90 (60, 120)	90 (60, 127.5)	90 (60, 120)