The purpose of this study is to assess whether Lyrica is a safe and effective treatment for partial epilepsy in comparison with an established treatment, Lamictal.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
660
dose 150-600 mg/day given BID
dose 100-500 mg/day given BID
Percentage of Seizure-free Participants (Responders) During Efficacy Assessment Phase
Responders = participants who achieved any 6 consecutive months (\>182 days) of seizure-freedom (absence of partial seizures, generalized seizures and unclassified epileptic seizures) during the 52 week efficacy assessment phase.
Time frame: Week 5 up to Week 56
Time to 6 Consecutive Months of Seizure-freedom After 4-week Dose Escalation Phase: All Seizures
Time in days, from first day of study medication to the first 6 months of seizure freedom after Day 28. Participants who did not achieve 6 months seizure freedom after Day 28 were censored from analysis.
Time frame: Week 4 up to Week 56
Exit Due to Adverse Events During the Double-blind Treatment Phase (Including Dose Escalation Phase)
Number of participants who exited the study due to adverse events during the double-blind treatment period. Time in days, from first day of study treatment to day of exit from the study due to an adverse event (ie, last day on study medication) during the double blind treatment period (including dose escalation phase) was inestimable. Observations with other reasons for exiting or participants who did not exit the study were right censored as of the last day on study medication.
Time frame: Week 0 to Week 56
Exit for Any Reason During the Double-blind Treatment Phase (Including Dose Escalation Phase)
Number of participants who exited the study for any reason during the double blind treatment phase. Time in days, from first day of study treatment to day of exit from the study due to any reason (ie, last day on study medication) was inestimable. Participants who did not exit the study were right censored as of the last day on study medication.
Time frame: Week 0 to Week 56
Exit Due to Lack of Efficacy After 4-week Dose Escalation Phase
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Number of participants who exited the study due to lack of efficacy after the 4-week dose escalation phase. Time in days, from first day of study treatment to day of exit due to lack of efficacy after Day 28 of the escalation phase (ie, last day on study medication) was inestimable. Participants who did not exit or exited for a different reason were right censored as of the last day on study medication.
Time frame: Week 4 up to Week 56
Exit Due to Any Reason After 4-week Dose Escalation Phase
Number of participants who exited the study due to any reason after the 4-week dose escalation phase. Time in days, from first day of study treatment to day of exit after Day 28 of the study due to any reason (ie, last day on study medication) was inestimable. Participants who did not exit or did not reach this phase were right censored as of the last day on study medication.
Time frame: Week 4 up to Week 56
Time to First Seizure After the 4-Week Dose Escalation Phase
Time in days, from first day of study treatment to the day of first seizure after Day 28 of the escalation phase (ie, last day on study medication). Participants who did not reach this phase or who did not have a seizure after Day 28 were right censored from the analysis as of the last day on study medication.
Time frame: Week 4 up to Week 56
Median Monthy Seizure Frequency: All Partial Seizures
All partial seizures include complex partial seizures, simple partial seizures, and partial seizures evolving to secondarily generalized seizures. Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Month of time = number of months after Week 4 (Dose Escalation).
Time frame: Baseline up to Week 60
Mean Monthy Seizure Frequency: All Partial Seizures
All partial seizures include complex partial seizures, simple partial seizures, and partial seizures evolving to secondarily generalized seizures. Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Month of time = number of months after Week 4 (Dose Escalation).
Time frame: Baseline up to Week 60
Median Monthy Seizure Frequency: All Seizures
Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Month of time = number of months after Week 4 (Dose Escalation).
Time frame: Baseline up to Week 60
Mean Monthy Seizure Frequency: All Seizures
Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Month of time = number of months after Week 4 (Dose Escalation).
Time frame: Baseline up to Week 60
Median Monthy Seizure Frequency of Responders for the Months After Achieving 6 Consecutive Months of Seizure Freedom: All Partial Seizures
All partial seizures include complex partial seizures, simple partial seizures, and partial seizures evolving to secondarily generalized seizures. Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Responder = participant who achieved at least 6 months of seizure freedom after Week 4 and up to Week 56. Monthly seizure frequency measured from day of achievement of 6 months of seizure freedom.
Time frame: Month 1 through Month 9 (after 6 months seizure freedom achieved)
Mean Monthy Seizure Frequency of Responders for the Months After Achieving 6 Consecutive Months of Seizure Freedom: All Partial Seizures
All partial seizures include complex partial seizures, simple partial seizures, and partial seizures evolving to secondarily generalized seizures. Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Responder = participant who achieved at least 6 months of seizure freedom after Week 4 and up to Week 56. Monthly seizure frequency measured from day of achievement of 6 months of seizure freedom.
Time frame: Month 1 through Month 9 (after 6 months seizure freedom achieved)
Median Monthy Seizure Frequency of Responders for the Months After Achieving 6 Consecutive Months of Seizure Freedom: All Seizures
Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Responder = participant who achieved at least 6 months of seizure freedom after Week 4 and up to Week 56. Monthly seizure frequency measured from day of achievement of 6 months of seizure freedom.
Time frame: Month 1 through Month 9 (after 6 months seizure freedom achieved)
Mean Monthy Seizure Frequency of Responders for the Months After Achieving 6 Consecutive Months of Seizure Freedom: All Seizures
Seizure frequency based on 28-day seizure rate: number (#) of seizures in period (month) divided by # days in period minus # of missing diary days in period \* 28. Responder = participant who achieved at least 6 months of seizure freedom after Week 4 and up to Week 56. Monthly seizure frequency measured from day of achievement of 6 months of seizure freedom.
Time frame: Month 1 through Month 9 (after 6 months seizure freedom achieved)
Percentage of Participants Who Achieved at Least 6 Consecutive Months of Seizure Freedom (Responders) by Final Dosage Levels and Treatment Group
Responder = participant who achieved at least 6-months of seizure freedom (all seizures) after Week 4, and up to Week 56. Dose Level defined as last total-daily-dose received after Week 4, and up to Week 56.
Time frame: Week 5 up to Week 56
Change From Baseline to Week 56 in Hospital Anxiety and Depression Scale (HADS)
Participant rated questionnaire with 2 subscales. HADS-A assesses state of generalized anxiety (anxious mood, restlessness, anxious thoughts, panic attacks); HADS-D assesses state of lost interest and diminished pleasure response (lowering of hedonic tone). Each subscale comprised of 7 items; range: 0 (no presence of anxiety or depression) to 3 (severe feeling of anxiety or depression). Total score 0 to 21 for each subscale; higher score indicates greater severity of symptoms. Scores relative to start of randomized treatment.
Time frame: Baseline to Week 56
Medical Outcomes Study Sleep Scale (MOS-SS): Optimal Sleep Subscale
MOS-SS: subject-rated instrument used to assess the key constructs of sleep over the past week; assesses sleep quantity and quality and is comprised 12 items yielding 7 subscale scores and 2 composite index scores. Optimal Sleep subscale is derived from sleep quantity average hours of sleep each night during the past week. Number of subjects with response Optimal if sleep quantity was 7 or 8 hours of sleep per night, and Non-optimal if average sleep was less than or greater than 7 to 8 hours per night. Analysis assesses the MOS-Sleep scale relative to the start of randomized treatment.
Time frame: Week 8, Week 32, and Week 56