Please assess the completion status of the following clinical trial:

Trial Title: High-Dose Steroid for Knee Arthroplasty Patients Expected to Have Postoperative Pain

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Age between 40 and 90.~* Booked for unilateral knee-arthroplasty.~* Is able to take part in the investigation(selfreported pain and nausea/vomiting)~* Understands Danish or English, or has a translator available.~* Signed written consent.~* A daily use of 30 mg or more of morphine or morphine equivalents .~* A pain catastrophizing scale(PCS) score of \>20.~Exclusion Criteria:~* Insulin-dependent diabetes melitus.~* Ongoing treatment with systemic glucocorticoids or immunosuppressing treatment(apart from inhaled glucocorticoids).~* Pregnancy/Breastfeeding~* Allergies for the investigational drug.~* A history of schizophrenia or bipolar diseases, or patients with permanent use of antipsychotic medication.

- Gender: ALL
- Minimum Age: 40 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- High dose Dexamethasone (Type: EXPERIMENTAL): An intravenous bolus dose of Dexamethasone 1 mg/kg bodyweight administered preoperatively before surgery.
- Medium dose Dexamethasone (Type: ACTIVE_COMPARATOR): An intravenous bolus dose of Dexamethasone 0,3 mg/kg bodyweight administered preoperatively before surgery.

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