Please assess the completion status of the following clinical trial:

Trial Title: Clinical Study on Sitagliptin for Assessment of Glucose-lowering Effects (0431-045)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE2
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Patients Have Type 2 Diabetes Mellitus On Diet/Exercise Therapy~Exclusion Criteria:~* Patients Have Type 1 Diabetes Mellitus

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 69 Years
- Healthy Volunteers: f

Study Arms:
- 1 (Type: PLACEBO_COMPARATOR): Placebo
- 2 (Type: EXPERIMENTAL): Sitagliptin 100 mg
- 3 (Type: EXPERIMENTAL): Sitagliptin 50 mg

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