Please assess the completion status of the following clinical trial:

Trial Title: Obesity Hypoventilation Syndrome Prevalence Study

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: OTHER
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Greater than or equal to 21 yrs. of age~* Referred to sleep lab for diagnostic PSG, initial titration PSG or split night PSG as routine clinical care~* BMI greater than or equal to 30kg/m2~Exclusion Criteria:~* Acutely ill or medically unstable to participate per PI~* Current positive airway pressure(PAP therapy)users~* Medical History of Chronic Obstructive Pulmonary Disease(COPD)~* Incapable of providing own informed consent~* BMI less than 30kg/m2

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- BMI greater than or equal to 30kg/m2 -venous (Type: None): BMI greater than or equal to 30kg/m2 scheduled for PSG as part of routine clinical care. Participants will undergo blood draw (venous blood gas and metabolic panel) and data collection from PSG study.
- BMI greater than or equal to 30kg/m2 - arterial (Type: None): BMI greater than or equal to 30kg/m2 scheduled for PSG as part of routine clinical care. Participants will undergo blood draw (arterial blood gas and metabolic panel) and data collection from PSG study.

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