| Primary | Change From Baseline to Last Assessment in Treatment Period in Montgomery-Asberg Depression Rating Scale (MADRS) Total Score | The MADRS is a 10-item scale to measure the severity of depressive episodes, where each item is rated on a scale from 0 to 6. The MADRS total score ranges from 0 to 60 with lower scores indicating less depressive symptoms. | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Baseline and week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Change From Baseline to Last Assessment in Treatment Period in Hamilton Depression Scale (HAM-D17) | The HAM-D17 is a clinician-rated 17-item scale for assessing the severity of depression symptoms. The scores for each item range from 0 to 4 or 0 to 2, where 0 represents no symptoms. The rating is based on the past 7 days prior to the time of assessment. The total score ranges from 0 to 52 with lower scores indicating less depressive symptoms. | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Baseline and week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Change From Baseline to Last Assessment in Treatment Period in Clinical Global Impression-Bipolar-Severity of Illness (CGI-BP-S): Overall Bipolar Illness | The CGI-BP-S is a scale which assesses a participant's severity of their overall bipolar illness, depression, and mania as assessed by the clinician using a scale from with the scale from 1 (Normal, not ill) to 7 (very severely ill). | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Baseline and week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Change From Baseline to Last Assessment in Treatment Period in CGI-BP-S: Depression | The CGI-BP-S is a scale which assesses a participant's severity of their overall bipolar illness, depression, and mania as assessed by the clinician using a scale from with the scale from 1 (Normal, not ill) to 7 (very severely ill). | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Baseline and week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Change From Baseline to Last Assessment in Treatment Period in CGI-BP-S: Mania | The CGI-BP-S is a scale which assesses a participant's severity of their overall bipolar illness, depression, and mania as assessed by the clinician using a scale from with the scale from 1 (Normal, not ill) to 7 (very severely ill). | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Baseline and and week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Clinical Global Impression-Bipolar-Change (CGI-BP-C): Overall Bipolar Illness | The CGI-BP-C is a scale which assesses the degree of change or improvement from baseline for each of overall bipolar illness, depression and mania, by grading it using 8 grades, from 1 (very much improved) to 7 (very much worse) or 8 (not applicable). Grade 8 (not applicable) was regarded as a missing value for purposes of calculating the mean score. | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | CGI-BP-C: Depression | The CGI-BP-C is a scale which assesses the degree of change or improvement from baseline for each of overall bipolar illness, depression and mania, by grading it using 8 grades, from 1 (very much improved) to 7 (very much worse) or 8 (not applicable). Grade 8 (not applicable) was regarded as a missing value for purposes of calculating the mean score. | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participant | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period |
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| Secondary | CGI-BP-C: Mania | The CGI-BP-C is a scale which assesses the degree of change or improvement from baseline for each of overall bipolar illness, depression and mania, by grading it using 8 grades, from 1 (very much improved) to 7 (very much worse) or 8 (not applicable). Grade 8 (not applicable) was regarded as a missing value for purposes of calculating the mean score. | FAS population; last assessment value is used for participants who discontinued before week 52. | Posted | | Mean | Standard Deviation | units on a scale | | Week 52 (or the time of last assessment for participants who discontinued earlier) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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| Secondary | Number of Participants With Adverse Events | An adverse event (AE) is defined as any undesirable or unintended sign (including abnormal laboratory test values), symptom, or disease occurring while the study drug was administered, regardless of whether or not there was a causal relationship with the study drug. A serious AE is defined as a an event resulting in death, persistent or significant disability/incapacity or congenital anomaly or birth defect, was life-threatening, re quire d or prolonged hospitalization or was considered medically important. | Safely Analysis Set (SAF), which included participants who received at least one dose of study drug. | Posted | | Count of Participants | | Participants | | From first dose of study drug up to week 52 (52 weeks) | | | | ID | Title | Description |
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| OG000 | FK949E Elderly Participants | After 2 days of dose-titration, elderly participants received either FK949E 150 mg or FK949E 300 mg once daily at bedtime from day 3 to week 52. Dose increase and reduction was allowed following dose increase or reduction guidelines and at the investigator's discretion. After which, participants went through a follow-up period of 1 week. For participants, who completed or discontinued treatment at FK949E 300 mg, a dose-tapering period was placed before proceeding to the follow-up period, and FK949E 150 mg was administered once daily for 1 week in this period. |
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