Please assess the completion status of the following clinical trial:

Trial Title: Dexamethasone for the Prevention of Postoperative Cognitive Dysfunction

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* patients over 60 years,~* underwent surgery for inguinal hernia repair, Nissen procedure, cholecystectomy or other surgeries midsize under general anesthesia and hospital stay expected within 72 hours.~Exclusion Criteria:~* age less than 60 years,~* history of brain disease or dementia, other psychiatric disorders that affect cognition,~* lack of proficiency in Portuguese,~* use of corticosteroids or opioid preoperatively.

- Gender: ALL
- Minimum Age: 60 Years
- Maximum Age: 90 Years
- Healthy Volunteers: f

Study Arms:
- Dexamethasone, POCD, psycological tests (Type: EXPERIMENTAL): Subjects will be randomly assigned in two groups: For the Dexamethasone group, 8mg of dexamethasone will be administered intravenously before the induction of general anesthesia. For Control Group, no Dexamethasone will be administered.~Tests for evaluation of quality of life, depressive symptoms and neuropsychological battery to assess general mental status, learning, attention, visuospatial perception, immediate memory, operational and executive skills and recall, including processing speed. This assessment will be applied before surgery, and 3, 7, 21, 90 and 180 days after surgery.
- Control, POCD, psycological tests (Type: SHAM_COMPARATOR): Subjects will be randomly assigned in two groups: For the Dexamethasone group, 8mg of dexamethasone will be administered intravenously before the induction of general anesthesia. For Control Group, no Dexamethasone will be administered.~Tests for evaluation of quality of life, depressive symptoms and neuropsychological battery to assess general mental status, learning, attention, visuospatial perception, immediate memory, operational and executive skills and recall, including processing speed. This assessment will be applied before surgery, and 3, 7, 21, 90 and 180 days after surgery.

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