Please assess the completion status of the following clinical trial:

Trial Title: Influence of Sleep Apnea on Risk of Atrial Fibrillation

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

Eligibility Criteria:
Inclusion Criteria:~Inclusion Criteria for Cases:~PAF defined by recurrent episodes of AF, which self-terminate within a 7-day period (based upon AHA consensus statement 77)~Age 18-80 years~Individuals able to participate in \> 2 overnight/daytime sleep and physiologic assessments over a 3 month period.~Inclusion Criteria for Controls:~Age 18 to 80 years~Individuals in normal sinus rhythm (NSR) with no current AF or history of AF~Individuals able to participate in an overnight/daytime sleep and physiologic assessment.~Exclusion Criteria:~Exclusion Criteria for Cases:~PAF with rapid or uncontrolled rate (\>120bpm)~Post-operative PAF~History of cardiac ablation or successful electro-cardioversion for PAF (ablation for other arrhythmias such as AVNRT and if PAF persists after cardioversion is acceptable )~Valvular stenosis, prosthesis or significant valvular insufficiency \[i.e. those with moderate or greater severity of aortic stenosis (aortic valve area \<1.5 cm2), mitral regurgitation which is moderate or more severe in degree (\>20% regurgitant fraction) or moderate or greater severity mitral stenosis (mitral valve area \<1.5 cm2)\]~Atrial septal defect~Infiltrative/restrictive cardiomyopathy~Sick sinus syndrome~Previously diagnosed SDB on specific SDB treatments (CPAP, oral appliances)~Severe chronic insomnia~Circadian rhythm disorder (e.g. shift work sleep disorder, delayed or advanced sleep phase syndrome)~Insufficient sleep syndrome defined by reported sleep duration \< 4 hrs~Supplemental oxygen use~Unstable medical conditions (e.g., new onset or changing angina, a myocardial infarction or congestive heart failure exacerbation documented within the previous 3 months, systolic heart failure (Left Ventricular Ejection Fraction \< 35%), high grade cardiac dysrhythmia/heart block, stroke with functional limitations, uncontrolled hypertension (BP\>170/110), abdominal aneurysm \>5.5 cm or \>1 cm growth/year, uncontrolled diabetes mellitus (HbA1c\>9.0), pulmonary hypertension, non-skin cancer diagnosis or treatment within the previous year, end stage renal and hepatic failure, immunodeficiencies (HIV, HCV), uncontrolled hypo- or hyperthyroidism)~Psychiatric disorders which are inadequately treated~Compromised competence~Alcohol abuse (currently drinks \>5 alcoholic drinks/day)~Pregnancy~Inability to provide informed consent~Illicit drug use over last 6 months~Rate controlling anti-arrhythmic medication (Classes I-III and V) with no further clinical occurrence of PAF~Has a Pacemaker or Implantable cardioverter-defibrillator.~Rationale for criteria: The goal of this study is to include those patients with PAF that is not secondary to the post-operative period or valvular disease and without ablation as these processes would result in alteration of atrial physiology and preclude assessment of independent SDB effects on AF which is independent of these conditions. Patients with sleep disorders will be excluded as sleep disorders may influence arrhythmogenesis. Those on treatment for SDB will be excluded because treatment would preclude assessment of SDB pathophysiologic effects on atrial arrhythmogenesis. Those with unstable medical conditions or rapid or uncontrolled heart rate will be excluded due to safety reasons.~Note: Exclusion criteria for positive airway pressure (PAP) intervention: Central Apnea Index\>5 noted on baseline examination sleep study or evidence of Cheyne Stokes Respirations/periodic breathing (cyclical crescendo and decrescendo change in breathing amplitude).~Exclusion Criteria for Controls:~Current or history of AF, otherwise the same exclusion criteria listed for cases.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- Case (diagnosed with PAF) (Type: OTHER): Cases. Patients with Paroxysmal Atrial Fibrillation who present to Electrophysiology Clinic at UHCMC and the Cleveland Clinic Foundation will be approached for recruitment in the study.~Cases found to have an apnea hypopnea index \>=15 will be asked to continue in the study for 3 months wearing a Continuous Positive Airway Pressure (CPAP) machine.
- Controls (Type: NO_INTERVENTION): Controls. Patients without AF will be recruited from General Cardiology and Internal Medicine clinics (geographically similar to controls). Selection bias will be minimized as there are a broad range of reasons for patients to present to these clinics.

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