Please assess the completion status of the following clinical trial:

Trial Title: PLUG Dementia Trial and MRI PLUG Dementia Sub-Study

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:~1. Male or female \>65 years of age~2. Atrial fibrillation documented by electrocardiogram, ambulatory event monitor, or telemetry within 6 months of enrollment~3. Moderate risk of thromboembolism based upon a CHADS2 score or CHADS2 Vasc score of ≥2.~4. Recipient of a left atrial appendage closure device within 3 months of enrollment (within 6 months, for patients considered for the MRI PLUG Dementia Sub-Study)~5. Have the ability to complete a mini-mental status evaluation~6. Have the ability to independently comprehend and complete a quality of life and dementia questionnaires.~7. Ability to provide informed consent for study participation~8. Willing and able to comply with the prescribed follow-up tests and schedule of evaluations.~Exclusion Criteria:~1. Have a history of any form of dementia~2. Have a life expectancy less than 24 months~3. Are unable to comply with the follow-up schedule~4. An upper age limit not to be used if participation inclusion criteria are met.~5. Participation in any other clinical trials involving an investigational or marketed drug within 30 days prior to entry in this study;~6. Other conditions that in the opinion of the Principal Investigator may increase risk to the subject and/or compromise the quality of the clinical trial~7. The Principal Investigator(s) determine(s) that the subject is not eligible for participation in this research study.~In addition to the above exclusion criteria, patients considered for the MRI PLUG Dementia Sub-Study will be excluded if the patient -~1. Does not receive a left atrial appendage closure device~2. Has contraindication towards the MRI scan (presence of a nonconditional cardiac implantable device, a history of metallic implants, shrapnel, neurosurgical clip placement)~3. Has conditional cardiac MRI cardiac implantable device, joint replacements, coronary stents, ASD/PFO closure devices, sternal wires or most prosthetic heart valves~4. Has severe renal dysfunction, defined as a creatinine clearance \<15 mL/min (documented within the last 3 months)

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

Study Arms:
- PLUG Dementia Trial (Type: None): Patients with atrial fibrillation that undergo a standard of care, clinically approved, left atrial appendage closure will be considered for study. All patients will be followed for 24 months, and will be assessed at the 3-, 6-, 12-, 18- and 24-months post-left atrial appendage closure as well as other visits deemed necessary for clinical care. All subjects will undergo protocol-specified laboratory tests and will complete 6 standard, validated questionnaires at each follow-up visit, except at the 3-month visit when only one questionnaire will be administered.
- MRI PLUG Dementia Sub-Study (Type: None): 20 of the 60 subjects who are selected for participation in this sub-study will receive a cranial MRI at baseline and at the 2-year (24 months) follow-up visit.

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