Please assess the completion status of the following clinical trial:

Trial Title: Determination of Upper Airway Collapsibility During Routine CPAP Titration

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Diagnosis of OSA and stable on CPAP treatment \> 3 months~Exclusion Criteria:~* Pregnancy~* Currently smoking~* Any respiratory disorder other than OSA or well controlled asthma~* Medications known to affect respiratory function (e.g. opioids, benzodiazepines, etc)

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 79 Years
- Healthy Volunteers: f

Study Arms:
- Obstructive Sleep Apnea (Type: EXPERIMENTAL): Upper airway collapsibility (passive Pcrit) will be measured using both clinically available equipment and research equipment in patients with obstructive sleep apnea (OSA) and stable on treatment of continuous positive airway pressure (CPAP) \> 3 months to verify the Pcrit measurement obtained by the clinical equipment.

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