Please assess the completion status of the following clinical trial:

Trial Title: Bowel Preparation for Colonoscopy in the Elderly

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE4
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* elderly people aged over 65 years~* elective outpatient colonoscopy~* informed consent~Exclusion Criteria:~* patients who had bowel movements of less than 3 per week during last one month~* patients who have a history of renal dysfunction (abnormal elevation of serum creatinine and electrolyte imbalance)~* patients who have a history of alimentary tract surgery~* patients who have other gastrointestinal diseases that are not suitable for undergoing colonoscopy (gastroparesis, gastric outlet obstruction, ileus, ischemic colitis, megacolon, and toxic colitis)~* patients classified as the American Society for Anesthesiology class III or higher~* Any condition which, in the opinion of the Investigator, places the patient at unacceptable risk if he/she were to participate in the study

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

Study Arms:
- Standard full-volume PEG (Type: ACTIVE_COMPARATOR): None
- Split-dose full-volume PEG (Type: EXPERIMENTAL): None
- Split-dose low-volume PEG (Type: EXPERIMENTAL): None

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