Please assess the completion status of the following clinical trial:

Trial Title: Adjunctive Vitamin D in the Treatment of Non-remitted Depression

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~Patients who meet the following criteria are eligible for enrolment in this trial:~1. Men or Women aged 18 to 65 (extremes included) who are out-patients~2. Patients with a primary diagnosis of Major Depressive Disorder (MDD) according to the DSM-IV-TR criteria (16), confirmed using the Mini International Neuropsychiatric Interview (MINI)~3. Patients who have failed to respond to treatment with a single pharmacological antidepressant agent at an adequate dose as defined by a lack of remission from the current depressive episode (score of 7 or less on the Hamilton Depression Scale) after eight weeks of treatment~4. On the basis of a physical examination, medical history and basic laboratory screening, the patient is, in the investigators opinion, in a suitable condition~5. Willing and able to attend study appointments in the correct time windows~Exclusion Criteria:~Patients meeting one or more of the following criteria cannot be selected for inclusion:~1. Any other Axis I disorder that was a primary disorder in the past 6 months. Co-morbid anxiety disorders will be permitted as long as MDD is judged to be the primary diagnosis.~2. Current or past mania or hypomania or a mixed mood disorder phase suggestive of a bipolar mood disorder as defined by the DSM-IV-TR (16)~3. Current or past psychotic disorder~4. Diagnosis of a mental retardation, dementia or other cognitive disorder~5. Current or past alcohol or drug use as defined in the DSM-IV-TR (16) in the last six months~6. Commencement of formal psychotherapy 30 days prior to Screening (formal psychotherapy for study purposes includes Cognitive Behavioural Therapy (CBT) or acute CBT treatment in individual therapy)~7. Current use of psychiatric medication other than the antidepressant to which the patient failed to show sufficient response. Short half-life hypnotics (anxiolytics) will be allowed p.r.n. in the evening for the treatment of insomnia~8. Patient using herbal or nutritional treatments judged to have anti-depressant effects unless they have discontinued its use with their physician's consent more than 2 weeks prior to entry into the study~9. Clinical interpretation of apparent suicide risk~10. Supplementation of vitamin D \>200IU per day in the past 6 months~11. Baseline serum vitamin D of \>150nmol/L~12. A history of parathyroid disease or kidney stones~13. Pregnant or breast-feeding females~14. Serious medical illness: Liver or renal insufficiency, cardiac, vascular, pulmonary, gastrointestinal, endocrine, neurological, infectious, neoplastic or metabolic disturbance, diabetes, dyslipidemia and hypertension;or in the judgment of investigator as not being appropriate for the study on medical grounds~15. The patient is, in the opinion of the investigator, unlikely to be able to comply with the clinical trial protocol, or is unsuitable for any other reasons.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Active (Type: EXPERIMENTAL): The vitamin D formula that will be used is Bio-D Mulsion 1000, produced by Biotics Research Corporation. This formula contains: Vitamin D (cholecalciferol), water and acacia gum and sesame oil.~Participants will be provided with a dose of vitamin D at each visit beginning at the Baseline visit. The weekly dose of vitamin D will be 28 000IU (the equivalent of 4000IU daily) for a period of eight weeks. If baseline or week 4 serum vitamin D levels are measured as \>100nmol/L, the dose will be reduced to 14 000IU (the equivalent of 2000IU daily). The dose will be dispensed, using the bottle dropper, onto a disposable plastic spoon which the participant will insert into their mouth.
- Placebo (Type: PLACEBO_COMPARATOR): The placebo formula, also produced by Biotics Research Corporation, will contain all of the non-medicinal ingredients but no vitamin D. It will be identical in appearance and taste.~Participants will be provided with a dose of the placebo at each visit beginning at the Baseline visit. The weekly dose will be 28 drops or 14 drops if serum Vitamin D levels are \>100nmol/L. The dose will be dispensed, using the bottle dropper, onto a disposable plastic spoon which the participant will insert into their mouth.

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