Please assess the completion status of the following clinical trial:

Trial Title: Effect of Dexamethasone on Sleep Related Breathing Disturbances in Patients With COPD at Altitude

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

Eligibility Criteria:
Inclusion Criteria:~* Chronic obstructive pulmonary disease (COPD), GOLD grade 1-2~* Living at low altitude (\<800m)~Exclusion Criteria:~* COPD exacerbation~* severe COPD, GOLD grade 3 or 4~* arterial oxygen saturation \<92% at low altitude (\<800 m)~* Diabetes, uncontrolled cardiovascular disease such as systemic arterial hypertension, coronary artery disease; previous stroke; pneumothorax in the last 2 months, untreated or symptomatic peptic ulcer disease, glaucoma, obstructive sleep apnea.~* Internal, neurologic or psychiatric disease that interfere with protocol compliance including current heavy smoking (\>20 cigarettes per day).~* pregnant or nursing patients

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Dexamethasone (Type: ACTIVE_COMPARATOR): Dexamethasone 4 mg capsules, twice per day, orally
- Placebo (Type: PLACEBO_COMPARATOR): Placebo capsules twice per day, orally

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