Table 2

Probability of remaining seizure-free after various periods from the index seizure, in the whole group, and in groups stratified by seizure occurrence

OutcomeWhole group (n=657) (95% CI)Single seizure at presentation (N=302) (95% CI)Epilepsy at presentation (N=354) (95% CI)Single seizure by 5 years (N=113) (95% CI)Single seizure by 10 years (N=94) (95% CI)
Seizure-free at 5 years from the index seizure0.37 (95% CI 0.33 to 0.41)0.43 (95% CI 0.37 to 0.49)0.32 (95% CI 0.27 to 0.37)
Seizure-free at 10 years from the index seizure0.33 (95% CI 0.29 to 0.37)0.39 (95% CI 0.33 to 0.44)0.29 (95% CI 0.24 to 0.33)0.90 (95% CI 0.82 to 0.94)
Seizure-free at 15 years from the index seizure0.32 (95% CI 0.28 to 0.35)0.38 (95% CI 0.33 to 0.44)0.26 (95% CI 0.22 to 0.31)0.89 (95% CI 0.81 to 0.93)0.99 (95% CI 0.92 to 0.998)
Seizure-free at 20 years from the index seizure0.31 (95% CI 0.28 to 0.35)0.38 (95% CI 0.33 to 0.44)0.26 (95% CI 0.21 to 0.31)0.89 (95% CI 0.81 to 0.93)0.99 (95% CI 0.92 to 0.998)
Seizure-free at 25 years from the index seizure0.29 (95% CI 0.26 to 0.33)0.36 (95% CI 0.30 to 0.42)0.24 (95% CI 0.20 to 0.29)0.83 (95% CI 0.72 to 0.90)0.92 (95% CI 0.80 to 0.97)