Please assess the completion status of the following clinical trial:

Trial Title: Sleep Apnea in Early to Mid-Stage Alzheimer's Disease

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:~* Diagnosis of Alzheimer-type dementia confirmed by the study's memory specialist.~* MMS comprised between 20 and 28 (inclusive)~* One main caregiver with full mental capacity, living under the same roof, present at all medical visits~* Patient covered by compulsory health insurance~* Patient signed the informed consent form~Exclusion Criteria:~* Prior diagnosis of sleep apnea or patients already benefitting from respiratory assistance equipment- History of COPD (Chronic Obstructive Pulmonary Disease), treated with bronchodilators or corticoids~* Patients with severe heart failure (stages III and IV of the NYHA Functional Classification)~* Patients with a recent history of stroke or myocardial infarction (within the last three months)~* Recently initiated or modified anticholinergic treatment (within the last two months)~* Patients under guardianship~* Behavioral disorders (pacing, agitation)~* Patients with severe dementia~* Patient with potentially low tolerance to treatment (latex allergies, claustrophobia, prior CPAP treatment which was badly tolerated)~* Serious bullous lung disease~* Pneumothorax~* Arterial hypotension~* Dehydration~* Cerebrospinal fluid effusion, recent concussion, or cranial surgery

- Gender: ALL
- Minimum Age: 65 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- OSAS + (Type: None): Patient with obstructive sleep apnea syndrome (OSAS)detected at the inclusion visit by a polysomnography
- OSAS - (Type: None): Patient without obstructive sleep apnea syndrome (OSAS)detected at the inclusion visit by a polysomnography

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