Please assess the completion status of the following clinical trial:

Trial Title: A Study Of Oral CP-690,550 As A Maintenance Therapy For Ulcerative Colitis

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Subjects who met study entry criteria and completed 8-week induction treatment from Study A3921094 or A3921095~* Subjects who achieved clinical response in Study A3921094 or A3921095~* Women of childbearing potential must test negative for pregnancy prior to study enrollment~* Subjects who are willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures~* Evidence of a personally signed and dated informed consent document(s) indicating that the subject (or a legally acceptable representative) has been informed of all pertinent aspects of the study.~Exclusion Criteria:~* Subjects who had major protocol violation (as determined by the Sponsor) in Study A3921094 or A3921095~* Presence of indeterminate colitis, microscopic colitis, ischemic colitis, infectious colitis, or clinical findings suggestive of Crohn's disease~* Subjects who have had surgery for UC or in the opinion of the investigator, are likely to require surgery for UC during the study period.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Placebo Comparator (Type: PLACEBO_COMPARATOR): None
- CP-690,550 5 mg Arm (Type: EXPERIMENTAL): None
- CP-690,550 10 mg Arm (Type: EXPERIMENTAL): None

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