| Primary | 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. | Full analysis set (FAS) (intent to treat population): randomized participants who took at least 1 dose of study medication. N = number of participants who had at least 1 dose of study treatment and seizure efficacy data. Analysis excludes participants who did not enter maintenance phase of study. | Posted | | Number | | percentage of participants | | Week 5 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| | Group IDs | Group Description | Statistical Method | Statistical Comment | P-Value | P-Value Comment | Parameter Type | Parameter Value | Dispersion Type | Dispersion Value | Confidence Interval Sides | Confidence Interval % | CI Lower Limit | CI Upper Limit | CI Lower Limit Comment | CI Upper Limit Comment | Estimate Comment | Tested Non-Inferiority | Non-Inferiority Type | Non-Inferiority Comment | Other Analysis Description |
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| Analysis of the binary response variable for 6 consecutive months seizure freedom analyzed by comparing the proportions of favorable responders between the two treatment groups after stratifying by clusters and correcting for skewness (Gart and Nam, 1990). Percentage can be obtained by multiplying proportion by 100. | Gart and Nam: correction of skewness | | | | Mean Difference (Final Values) | -0.16 | | | 2-Sided | 95 | -0.24 | -0.09 | | | 95% confidence interval for the true difference in proportions, as well as a one-sided test at α=0.025; confidence interval adjusted for centers clustered within a geographical region, with upper and lower confidence limits. | | |
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| Secondary | 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. | FAS. N = number of participants who entered maintenance phase of study and had seizure efficacy data. | Posted | | Median | 95% Confidence Interval | days | | Week 4 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of participants who entered maintenance phase of study and had seizure efficacy data. Time to exit due to adverse events was inestimable as survival estimate at end of maintenance phase was below 0.500. | Posted | | Number | | participants | | Week 0 to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of participants who had at least 1 dose of study treatment and seizure efficacy data Time to exit for any reason during the double-blind treatment phase was inestimable as the survival estimate at the end of the maintenance phase was below 0.500. | Posted | | Number | | participants | | Week 0 to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | Exit Due to Lack of Efficacy After 4-week Dose Escalation Phase | 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. | FAS. N = number of participants who entered maintenance phase of study and had seizure efficacy data. Time to exit due to lack of efficacy after 4-week dose escalation phase was inestimable as survival estimate at end of maintenance phase was below 0.500. | Posted | | Number | | participants | | Week 4 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of participants who entered maintenance phase of study and had seizure efficacy data. Time to exit for any reason after the 4-week dose escalation phase was inestimable as the survival estimate at the end of the maintenance phase was below 0.500. | Posted | | Number | | participants | | Week 4 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of participants who entered maintenance phase of study and had seizure efficacy data. | Posted | | Median | 95% Confidence Interval | days | | Week 4 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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). | FAS. N = number of participants with analyzable data; n = number of participants with analyzable data at observation. | Posted | | Median | Standard Deviation | seizures/28 days | | Baseline up to Week 60 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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). | FAS. N = number of participants with analyzable data; n = number of participants with analyzable data at observation. | Posted | | Mean | Standard Deviation | seizures/28 days | | Baseline up to Week 60 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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). | FAS. N = number of participants with analyzable data; n = number of participants with analyzable data at observation. | Posted | | Median | Standard Deviation | seizures/28 days | | Baseline up to Week 60 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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). | FAS. N = number of participants with analyzable data; n = number of participants with analyzable data at observation. | Posted | | Mean | Standard Deviation | seizures/28 days | | Baseline up to Week 60 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of responders; n = number of responders with analyzable data at observation. | Posted | | Median | Standard Deviation | seizures/28 days | | Month 1 through Month 9 (after 6 months seizure freedom achieved) | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of responders; n = number of responders with analyzable data at observation. | Posted | | Mean | Standard Deviation | 28-day seizure rate | | Month 1 through Month 9 (after 6 months seizure freedom achieved) | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of responders; n = number of responders with analyzable data at observation. | Posted | | Median | Standard Deviation | seizures/28 days | | Month 1 through Month 9 (after 6 months seizure freedom achieved) | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS. N = number of responders; n = number of responders with analyzable data at observation. | Posted | | Mean | Standard Deviation | 28-day seizure rate | | Month 1 through Month 9 (after 6 months seizure freedom achieved) | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | FAS; N = number of participants with analyzable data. | Posted | | Number | | percentage of participants | | Week 5 up to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin 150 mg/Day | Pregabalin 150 mg/day administered twice daily (BID) | | OG001 | Pregabalin 300 mg/Day | Pregabalin 300 mg/day administered BID | | OG002 | Pregabalin 450 mg/Day | Pregabalin 450 mg/day administered BID | | OG003 | Pregabalin 600 mg/Day | Pregabalin 600 mg/day administered BID | | OG004 |
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| Secondary | 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. | FAS; N = number of participants with a HADS measurement at baseline and Week 56. | Posted | | Least Squares Mean | Standard Error | scores on scale | | Baseline to Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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| Secondary | 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. | | Posted | | Number | | participants | | Week 8, Week 32, and Week 56 | | | | ID | Title | Description |
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| OG000 | Pregabalin | Pregabalin 150, 300, 450 or 600 mg/day orally twice daily (BID); individual titration based on number of seizures experienced once Level 1 (150 mg/day) was maintained for at least 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. | | OG001 | Lamotrigine | Lamotrigine 100, 200, 400, or 500 mg/day orally BID; individual titration based on number of seizures experienced once Level 1 (100 mg/day) was reached and maintained for 7 days, and dose reductions based on intolerable adverse events. Escalation to next dose level allowed only after completing previous dose level for at least 1 week. |
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