| E.1 Medical condition or disease under investigation |
| E.1.1 | Medical condition(s) being investigated |
| Major Depressive Disorder (MDD) or Persistent Depressive Disorder (PDD) |
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| E.1.1.1 | Medical condition in easily understood language |
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| E.1.1.2 | Therapeutic area | Psychiatry and Psychology [F] - Mental Disorders [F03] |
| MedDRA Classification |
| E.1.2 Medical condition or disease under investigation |
| E.1.2 | Version | 21.1 |
| E.1.2 | Level | PT |
| E.1.2 | Classification code | 10057840 |
| E.1.2 | Term | Major depression |
| E.1.2 | System Organ Class | 10037175 - Psychiatric disorders |
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| E.1.3 | Condition being studied is a rare disease | No |
| E.2 Objective of the trial |
| E.2.1 | Main objective of the trial |
| Investigate superiority vs. placebo of anti-depressant effect of Venlafaxine (37.5-225 mg/day) in pediatric patients with major depressive disorder (MDD) or persistent depressive disorder (PDD). |
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| E.2.2 | Secondary objectives of the trial |
| Evaluate the safety and tolerability of venlafaxine (37.5-225 mg/day) in pediatric patients with major depressive disorder (MDD) or persistent depressive disorder (PDD). |
|
| E.2.3 | Trial contains a sub-study | No |
| E.3 | Principal inclusion criteria |
1. Japanese male or female aged between 12 and 17 years at the initiation of the screening period (Visit 1). 2. Participants/parents who provided applicable written informed consent and written informed assent. 3. Outpatient participants. 4. Participants with a diagnosis of MDD or PDD based on the DSM-5 diagnostic criteria. |
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| E.4 | Principal exclusion criteria |
1. Participants who have received any prior treatment with venlafaxine or desvenlafaxine. 2. Participants with known hypersensitivity to venlafaxine or desvenlafaxine. 3. Participants with a history or presence of clinically significant cardiac, hepatic, renal, respiratory, endocrinological, neurological, or hematological disease. 4. Participants with a history or complication of ocular tension increased or acute narrow-angle glaucoma. 5. Participants with a history or presence of other medical disease that might compromise the study. |
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| E.5 End points |
| E.5.1 | Primary end point(s) |
| The primary endpoint will be the estimated population-based average treatment effect on change from baseline children depression rating scale-revised (CDRS-R) score for Venlafaxine relative to placebo at Week 8 for the adolescent population (12-17 years old) under the assumption that participants who drop out follow the same evolution of the disease as other non-dropout participants in their respective treatment group who remain in the study. |
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| E.5.1.1 | Timepoint(s) of evaluation of this end point |
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| E.5.2 | Secondary end point(s) |
| The secondary estimand (s) will be the estimated population-based average treatment effect on secondary efficacy, safety, and Pharmacokinetic (PK) endpoints for the adolescent population (12-17 years old) under the assumption that participants who drop out follow the same evolution of the disease as other non-dropout participants in their respective treatment group who remain in the study. |
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| E.5.2.1 | Timepoint(s) of evaluation of this end point |
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| E.6 and E.7 Scope of the trial |
| E.6 | Scope of the trial |
| E.6.1 | Diagnosis | No |
| E.6.2 | Prophylaxis | No |
| E.6.3 | Therapy | No |
| E.6.4 | Safety | Yes |
| E.6.5 | Efficacy | Yes |
| E.6.6 | Pharmacokinetic | Yes |
| E.6.7 | Pharmacodynamic | No |
| E.6.8 | Bioequivalence | No |
| E.6.9 | Dose response | No |
| E.6.10 | Pharmacogenetic | No |
| E.6.11 | Pharmacogenomic | No |
| E.6.12 | Pharmacoeconomic | No |
| E.6.13 | Others | No |
| E.7 | Trial type and phase |
| E.7.1 | Human pharmacology (Phase I) | No |
| E.7.1.1 | First administration to humans | No |
| E.7.1.2 | Bioequivalence study | No |
| E.7.1.3 | Other | No |
| E.7.1.3.1 | Other trial type description | |
| E.7.2 | Therapeutic exploratory (Phase II) | No |
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
| E.7.4 | Therapeutic use (Phase IV) | No |
| E.8 Design of the trial |
| E.8.1 | Controlled | Yes |
| E.8.1.1 | Randomised | Yes |
| E.8.1.2 | Open | No |
| E.8.1.3 | Single blind | No |
| E.8.1.4 | Double blind | Yes |
| E.8.1.5 | Parallel group | Yes |
| E.8.1.6 | Cross over | No |
| E.8.1.7 | Other | No |
| E.8.2 | Comparator of controlled trial |
| E.8.2.1 | Other medicinal product(s) | No |
| E.8.2.2 | Placebo | Yes |
| E.8.2.3 | Other | No |
| E.8.2.4 | Number of treatment arms in the trial | 2 |
| E.8.3 |
Will this trial be conducted at a single site globally?
| No |
| E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
| E.8.6 Trial involving sites outside the EEA |
| E.8.6.2 | Trial being conducted completely outside of the EEA | Yes |
| E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
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| E.8.7 | Trial has a data monitoring committee | No |
| E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
|
| The end of the study is defined as the date of the last scheduled procedure shown in the SOA for the last participant in the trial. |
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| E.8.9 Initial estimate of the duration of the trial |
| E.8.9.2 | In all countries concerned by the trial years | 4 |
| E.8.9.2 | In all countries concerned by the trial months | 48 |