Please assess the completion status of the following clinical trial:

Trial Title: Dexamethasone in Pain Control After Total Knee Replacement

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE4
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* ASA I-III~* Age 18-80 years old~* Scheduled for elective primary unilateral total knee replacement~* Chinese patients~* Able to speak and understand Cantonese~* Able to provide informed oral and written consent~Exclusion Criteria:~* Revision total knee replacement~* Single stage bilateral total knee replacement~* Known allergy to opioids, local anaesthetic drugs, paracetamol, non-steroidal anti-inflammatory drugs (NSAIDS) including COX-2 inhibitors~* History of chronic pain other than chronic knee pain~* History of insulin dependent diabetic mellitus, but not diabetic mellitus on oral hyperglycaemic agents~* History of hepatitis B or C carrier~* History of peptic ulcer~* Hx of tuberculosis~* History of immunosuppression~* Daily use of glucocorticoids~* Daily use of strong opioids (morphine, fentanyl, hydromorphone, ketobemidone, methadone, nicomorphine, oxycodone, or meperidine)~* History of severe heart disease (NYHA 2)~* Alcohol or drug abuse~* Impaired renal function, defined as preoperative serum creatinine level over 120micromol/L~* Pre-existing neurological or muscular disorders~* Psychiatric illness or neurologic or psychiatric diseases potentially influencing pain perception~* Impaired or retarded mental state~* Difficulties in using patient controlled analgesia (PCA)~* Pregnancy~* Local infection~* On immunosuppresants~* Patient refusal

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

Study Arms:
- Group D1 (Type: ACTIVE_COMPARATOR): Patients from group D will be given a bolus injection of 2 ml saline with 2 ml dexamethasone (4mg/ml) before skin incision.
- Group D2 (Type: EXPERIMENTAL): 4ml bolus injection of dexamethasone (4mg/ml) will be given intravenously prior to incision.
- Group C (Type: PLACEBO_COMPARATOR): 4ml bolus injection of 0.9% saline will be given intravenously prior to incision

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