NCT07577843 · Janssen Research & Development, LLC
A Study of JNJ-78934804 in Participants With Moderately to Severely Active Crohn's Disease
(DUET ENCORE-CD)
What this study is about
The purpose of this study is to assess how well JNJ-78934804 works (effectiveness) and how safe it is (safety) as compared to guselkumab at Week 48 in participants with moderately to severely active Crohn's disease (a long-term, progressive \[worsens with time\] and life-threatening disease of the intestine).
View original scientific description
The purpose of this study is to assess how well JNJ-78934804 works (efficacy) and how safe it is (safety) as compared to guselkumab at Week 48 in participants with moderately to severely active Crohn's disease (a long-term, progressive \[worsens with time\] and life-threatening disease of the intestine).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Have a diagnosis of Crohn's disease (CD) or fistulizing CD established greater than or equal to (\>=) 12 weeks before screening including both endoscopic evidence and a histopathology report consistent with a diagnosis of CD
- Have moderately to severely active CD based on crohn's disease activity index (CDAI) criteria defined as a baseline CDAI score \>= 220 but less than or equal to (\<=) 450 and either: a. Mean daily stool frequency (SF) count \>= 4.0, based on the unweighted CDAI component of the number of liquid or very soft stools or b. Mean daily AP score \>= 2.0, based on the unweighted CDAI component of abdominal pain (AP)
- Have moderately to severely active ileal and/or colonic CD as assessed by central review of the screening video ileocolonoscopy based on simple endoscopic score for crohn's disease (SES-CD) criteria
- Have had an inadequate initial response, loss of response, or intolerance to previously approved systemic therapies
Exclusion criteria
- Diagnosis of indeterminate colitis, microscopic colitis, ischemic colitis, ulcerative colitis (UC) or clinical findings highly suggestive of UC
- Complications of CD such as symptomatic bowel strictures or stenoses, or any other manifestation that may require intestinal surgery while enrolled in the study
- Presence of draining (that is, functioning) stoma or ostomy
- Has a history of short bowel syndrome, is missing greater than (\>) 2 of the 5 ileocolonic segments, or has any other medical condition that could preclude or confound the ability to use efficacy assessment tools (such as CDAI) to assess response to study intervention
- Currently has or is suspected of having an abscess
Where
- Anaheim, California
- Chula Vista, California
- Colorado Springs, Colorado
- Miami, Florida
- Tampa, Florida
- New York, New York
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jul 6, 2026 · Source of record for eligibility and locations