Table 2.

Rate of relapse after attaining complete remission (5 years seizure-free and 5 years drug-free) overall and by 5-year epochs

Time period since achieving complete remission	Number contributing person-years to the time epoch	Relapse, n	Person years	Rate/1000 person-years	95% CI
Overall	327	23	2813.5	8.2	4.8–11.5
0–5 years	327	16	1496.6	10.7	5.5–15.9
5–10 years	265	7	1048.7	6.7	1.7–11.6
>10 years	138	0	268.1	0	0–11.2

P = 0.06 for the trend in decreasing rate from one time epoch to the next.