Long-term quality of life in patients with focal seizures treated with adjunctive eslicarbazepine acetate

Abstract

By controlling seizures, anti-seizure medications can improve health-related quality of life (HRQOL). Data from a post-hoc pooled analysis of adjunctive eslicarbazepine acetate (ESL) was used to describe HRQOL measures, including overall quality of life, seizure worry, emotional well-being, energy/fatigue, cognitive functioning, medication effects, social function, and overall score over a period of up to one year. Patients who completed a double-blind treatment phase (Part 1) of these trials were eligible to enter the open label extension (OLE; Part 2). Patients who continued into the OLE initiated adjunctive ESL at 800 mg/day for 1 month before investigators could titrate dosages based on efficacy and tolerability. HRQOL was measured at baseline and at the last assessment using the Quality of Life in Epilepsy Inventory (QOLIE-31) in all patients who entered the 1-year OLE and in patients who completed the 1-year OLE. The mean QOLIE-31 scores and mean change in scores were analyzed using paired t-tests. The percentage of patients with improvements in QOLIE-31 scores beyond the minimally important change (MIC) threshold from baseline to end of 1-year OLE is described. Of 1410 patients in the intent-to-treat population, 1120 patients continued to part 2, and 795 patients completed the OLE. In patients who entered the OLE, mean improvements in scores for seizure worry, overall quality of life, emotional well-being, medication side effects, social functioning, and total score were statistically significant. In patients who completed the OLE, the mean change to final assessment was statistically significantly improved for all QOLIE categories. In patients who entered the OLE with a final assessment, the percentage of patients meeting the MIC for social functioning was the highest (46.9%), followed by medication effects (44.9%), and seizure worry (42.9%). Patients who completed the OLE with a final assessment found a similar rank ordering in QOLIE scale improvements compared with those who entered the OLE with a final assessment. For both sets of patient groups, the least number of subjects met MIC criteria for the energy/fatigue QOLIE category. Treatment with therapeutic doses of adjunctive ESL in patients with focal seizures was associated with improvements in HRQOL for a period of up to one year.

Keywords: Focal seizures; QOLIE-31; Quality of Life.