Comparison of Surgery and Medicine on the Impact of Diverticulitis (COSMID) Trial
Launched by UNIVERSITY OF WASHINGTON · Sep 18, 2019
Trial Information
Current as of July 25, 2025
Recruiting
Keywords
ClinConnect Summary
The COSMID trial is a research study aimed at understanding whether surgery or medicine is more effective for patients suffering from diverticulitis, a condition that can severely affect quality of life. Specifically, it compares elective colectomy (a type of surgery that removes part of the colon) to the best available medical treatments for those with recurrent or persistent symptoms related to diverticular disease. The study hopes to find out if patients who undergo surgery report better outcomes than those who receive medical management alone.
To participate in this trial, you need to be at least 18 years old, have had at least one confirmed episode of diverticulitis, and meet certain health criteria that indicate you are experiencing ongoing issues related to the disease. Participants can expect to be randomly assigned to either the surgery or the medical management group, and there will also be an option for those who prefer not to be randomized to still contribute to the study by sharing their experiences. This trial is currently recruiting participants, and it aims to provide valuable insights into the best treatment options for individuals with diverticulitis.
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • 1. Adults ≥18 years
- • 2. At least one episode of diverticulitis confirmed by CT scan (or pending confirmation) and a colonoscopy (completed or scheduled) to rule out or screen for other colon pathology concordant with screening guidelines; AND A. History of recurrent uncomplicated diverticulitis without current symptoms (AUD in remission); OR B. Persistent signs, symptoms, and concerns related to diverticular disease ≥3 months after recovery from an episode of AUD (e.g., excluding irritable bowel syndrome and other conditions in coordination with gastroenterologist)
- Exclusion Criteria:
- • 1. Unable or unwilling to return or be contacted for and/or complete research surveys;
- • 2. Currently incarcerated in a detention facility or in police custody (patients wearing a monitoring device can be enrolled) at baseline/screening;
- • 3. Previous operation for diverticulitis
- • 4. Current diagnosis or previous endoscopic or surgical interventions for fistula or stricture or current significant bleeding related to diverticular disease.
- • 5. Right-sided diverticulitis
- • 6. Comorbid or prior surgical conditions that contraindicate elective surgery (e.g., liver failure, renal failure, malignancy, "frozen abdomen")
- • 7. Actively undergoing chemotherapy or radiation for malignancy
- • 8. Immunodeficiency (e.g., absolute neutrophil count \<500/mm3, chronic immunosuppressive drugs (e.g., oral corticosteroids, anti-TNF agents), or known AIDS \[i.e., recent CD4 count \<200 \] assessed by patient history);
- • 9. Taking prescription medication to treat active inflammatory bowel disease (e.g., Crohn's, ulcerative colitis);
- • 10. Taking prescription medication for irritable bowel syndrome;
- • 11. Pregnant or expectation of becoming pregnant in the 30 days following baseline/screening;
- • 12. Prior enrollment in the study or other investigational drug or vaccine while on study treatment;
- • 13. Abdominal/pelvic surgery in the past month
About University Of Washington
The University of Washington (UW) is a leading academic institution renowned for its commitment to advancing healthcare through innovative research and clinical trials. With a robust network of interdisciplinary teams, UW fosters collaboration among top-tier researchers, clinicians, and healthcare professionals, aiming to translate scientific discoveries into impactful treatments and interventions. The university is dedicated to ethical research practices and participant safety, ensuring rigorous adherence to regulatory standards in all clinical trials. Through its state-of-the-art facilities and extensive expertise, UW strives to address pressing health challenges and improve patient outcomes on a local and global scale.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Seattle, Washington, United States
New York, New York, United States
Charleston, South Carolina, United States
Seattle, Washington, United States
Los Angeles, California, United States
Chicago, Illinois, United States
Burlington, Massachusetts, United States
Stanford, California, United States
Springfield, Illinois, United States
Savannah, Georgia, United States
Boston, Massachusetts, United States
Pittsburgh, Pennsylvania, United States
Albany, New York, United States
Dallas, Texas, United States
Denver, Colorado, United States
Gainesville, Florida, United States
Seattle, Washington, United States
Tampa, Florida, United States
Richmond, Virginia, United States
Rochester, New York, United States
Iowa City, Iowa, United States
Gainesville, Florida, United States
Philadelphia, Pennsylvania, United States
New York, New York, United States
Evanston, Illinois, United States
San Diego, California, United States
Salt Lake City, Utah, United States
Flushing, New York, United States
San Francisco, California, United States
Charlotte, North Carolina, United States
Columbus, Ohio, United States
Patients applied
Trial Officials
David R Flum, MD
Principal Investigator
University of Washington
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported
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