Please assess the completion status of the following clinical trial:

Trial Title: The Efficacy of AZD1722 in Constipation Predominant Irritable Bowel Syndrome (IBS-C)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Females and males must agree to use appropriate methods of contraception or be sterile (with appropriate documentation)~* Subject is ambulatory~* Subject meets definition of IBS-C using Rome III Criteria for the Diagnosis of IBS with a history of \<5 SBMs per week~* Subject meets Screening eligibility criteria (see below)~* A colonoscopy based on AGA guidelines; every 10 years at ≥ 50 years old, or the occurrence of any warning signs (i.e., unexplained weight loss, non-hemorrhoid blood in stools)~* Ability to communicate well with the Investigator and to comply with the requirements of the entire study, including an understanding of how to use the touch-tone telephone electronic diary.~* Written informed consent and a willingness to participate in the study as it is described.~* Daily access to a touch tone telephone.~Exclusion Criteria:~* Functional diarrhea as defined by Rome III criteria~* IBS with diarrhea (IBS-D), mixed IBS (IBS-M), or unsubtyped IBS as defined by Rome III criteria~* Diagnosis or treatment of any clinically symptomatic biochemical or structural abnormality of the GI tract within 6 months prior to screening, or active disease within 6 months prior to screening. Including but not limited to cancer, inflammatory bowel disease, diverticulitis, duodenal ulcer, erosive esophagitis, gastric ulcer, pancreatitis (within 12 months of screening), cholelithiasis, amyloidosis, ileus, non-controlled GERD, gastrointestinal obstruction or carcinoid syndrome.~* Use of medications that are known to affect stool consistency (Prohibited Medications), including fiber supplements, anti-diarrheals, cathartics, antacids, opiates, prokinetic drugs, laxatives, enemas, antibiotics within 4 weeks of enrollment, probiotics (including probiotic yogurt); or salt or electrolyte supplements containing sodium, potassium, chloride, or bicarbonate formulations during the seven days prior to treatment; unless specified as rescue medication, and used accordingly.~* Clinical evidence of significant cardiovascular, respiratory, renal, hepatic, gastrointestinal, hematologic, neurologic, psychiatric or any disease that may interfere with the subject successfully completing the trial.~* The subject has a history or current evidence of laxative abuse (in the clinical judgment of the physician).~* Hepatic dysfunction (ALT \[SGPT\] or AST \[SGOT\] \>2.5 times the upper limit of normal) or renal impairment (serum creatinine \> 2mg/dL).~* Any evidence of or treatment of malignancy (other than localized basal cell, squamous cell skin cancer or cancer in situ that has been resected) within the previous year.~* Any surgery on the stomach, small intestine or colon, excluding appendectomy.~* Pregnant or lactating women.~* A major psychiatric disorder (DSM-III-R or DSM-IV) including major depression or other psychoses that has required hospitalization in the last 3 years. History of attempted suicide or uncontrolled bipolar disorder. Alcohol or substance abuse in the last year.~* Participation in other clinical trials within 1 month prior to Day -14 (beginning of screening period).~* If, in the opinion of the Investigator the subject is unable or unwilling to fulfill the requirements of the protocol or has a condition, which would render the results uninterpretable.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- 5 mg BID (Type: EXPERIMENTAL): AZD1722
- 20 mg BID (Type: EXPERIMENTAL): AZD1722
- 50 mg BID (Type: EXPERIMENTAL): AZD1722
- Placebo (Type: PLACEBO_COMPARATOR): None

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

Answer: outcome: complete