Please assess the completion status of the following clinical trial:

Trial Title: CPAP to Reduce Arterial Stiffness in Non Sleepy, Moderate to Severe Obstructive Sleep Apnea (STIFFSLEEP)

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

Eligibility Criteria:
Inclusion Criteria:~* moderate to severe obstructive sleep apnea, defined as apnea/hypopnea index superior to 15~Exclusion Criteria:~* Epworth sleep scale superior to 16~* other sleep diseases~* moderate or severe lung disease~* cardiac disease other than hypertension~* cerebrovascular diseases~* other vascular diseases~* other chronic diseases except metabolic syndrome

- Gender: MALE
- Minimum Age: 30 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- OSA w/o EDS (Type: None): Males with moderate to severe obstructive sleep apnea without excessive daytime sleepiness will be proposed nocturnal CPAP (ResMed S9 AutoSet) for three months
- OSA w EDS (Type: None): Males with moderate to severe obstructive sleep apnea with excessive daytime sleepiness will be proposed nocturnal CPAP (ResMed S9 AutoSet) for three months

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