Please assess the completion status of the following clinical trial:

Trial Title: Continuation Electroconvulsive Therapy Vs Medication to Prevent Relapses in Patients With Major Depressive Disorder

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: None
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE4
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~-~Patients must have:~Major depressive disorder that is responsive to acute phase ECT.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Based on this trial design, predict the completion outcome and termination type (if applicable).