Please assess the completion status of the following clinical trial:

Trial Title: Effects of Non-invasive Ventilation on Rehabilitation Outcome in COPD-patients

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

Eligibility Criteria:
Inclusion Criteria:~* confirmed diagnosis of COPD in stages GOLD III/ IV~* receiving optimized medical treatment and long term oxygen therapy if needed~* patients consent to participate in this trial~* no treatment with NIV in the last 4 weeks~* treatment with NIV in the last 4 weeks due to an acute exacerbation~Exclusion Criteria:~* treatment with NIV in the last 4 weeks (except due to an acute exacerbation)~* Intolerance to perform NIV~* Acute exacerbation at baseline or during PR~* Hypercapnia \> pCO2 55mmHg~* Inability to perform a 6 minute walking test

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- pulmonary rehabilitation with NIV (Type: ACTIVE_COMPARATOR): Patients receiving nocturnal non-invasiv Ventilation during a 3-week pulmonary Rehabilitation program.
- pulmonary rehabilitation without NIV (Type: SHAM_COMPARATOR): Patients receiving no nocturnal non-invasiv Ventilation during a 3-week pulmonary Rehabilitation program.

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