Please assess the completion status of the following clinical trial:

Trial Title: High Flow Nasal Cannula for Obstructive Sleep Apnea

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

Eligibility Criteria:
Inclusion Criteria:~* Apnea hypopnea index greater than 5 times per hour~* Age greater than 18 years old.~Exclusion Criteria:~* Central sleep apnea~* Hypoventilation syndrome~* Chronic obstructive airway disease~* Receive soft palate surgery or used an oral appliance~* Intolerance to transnasal high flow or CPAP~* Pregnant women~* Unstable hemodynamic state~* Eastern Cooperative Oncology Group Performance Status higher than grade 2

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- First night HFNC group (Type: EXPERIMENTAL): The first night will receive high flow nasal cannula (HFNC) therapy and the second night accept continuous positive airway pressure (CPAP) therapy.
- First night CPAP group (Type: ACTIVE_COMPARATOR): In contrast, the first night will receive continuous positive airway pressure and the second accept high flow nasal cannula therapy.

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