Last modified: 2014-04-03
Abstract
Introduction: About 20% of patients develop drug –resistant epilepsy (DRE). There are only few studies on outcome of medically-treated DRE in children (1,2).
Methods: This observational study was carried out in a hospital-based child neurology clinic in a large Indian city. Patients included were 1) Onset age < 13 yrs 2) Mean frequency of 1 seizure / month for at least 2 years despite therapy with =>2 AEDs. 3) Minimum 5 years from epilepsy onset. Chart reviews and caretaker interviews were used. Progressive disorders, idiopathic epilepsies and surgical patients were excluded.
The Kaplan Meier survival analysis was used to construct a life table, using <1 seizure per year as a definition for good control. Poor control was defined as <75% control while good control as > 75% control on day of data entry. The Pearson Chi Square test was used to test the association between various characteristics and poor control.
Results: Of 62 patients, follow-up information was sufficient in 60 of which 4 were excluded as they had surgical treatment. Follow up was between 5-24 years (mean 10.6 yrs). Of the remaining 56 patients 36(64.29%) had >75% improvement (26 patients were seizure free) and 20(35.71%) had <=75% improvement. The percentage of patients who remit per year was 4.5%. Abnormal imaging & use of =>5 AEDs were associated with <75% improvement.
Conclusions: The long-term outcome in medically-treated DRE in children is not as pessimistic as would seem. Our results generally are in line with earlier publications (1,2).
Keywords
References
1) Huttenlocher PR, Hapke RJ. Ann Neurol 1990; 28(5):699-705
2) Camfield P, Camfield C. Epilepsia 2007;48(6): 1128-32