Studies how hard-to-treat Crohn's disease affects patients in China
Observes adults with Crohn's disease that does not respond well to treatment.
Plain-language title generated from the registry record
Registry title: Epidemiological Characteristics and Efficacy Evaluation of Difficult-To-Treat Crohn's Disease
Key facts
- Where
- Guangzhou, ChinaSee the site
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 65 years old?
Source: NCT07364734, who can take part
Where in China
- Sixth Affiliated Hospital, Sun Yat-sen UniversityGuangzhou, ChinaTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Xiang Gao
- Trial code
- NCT07364734
- Record updated
- 23 January 2026
- Original description
Difficult to treat Crohn's disease (DTT-CD) was defined by the International Organization for the Study of Inflammatory Bowel Diseases (IOIBD) in 2023, which refers to CD patients with poor response to drug treatment and poor prognosis. Foreign epidemiological studies have shown that DTT-CD accounts for 24.8% of all CD patients, and most of them are patients with advanced treatment failure according to more than two different mechanisms. Our previous retrospective data suggested that compared with foreign DTT-CD patients, there was no significant difference in the proportion of patients with advanced treatment failure due to more than two different mechanisms, but the proportion of patients with recurrence after two intestinal resection and complex anal fistula was increased. Therefore, this project aims to determine the current prevalence and epidemiological status of DTT-CD in China; To clarify the difference in efficacy and prognosis between DTT-CD patients and non DTT-CD patients using advanced treatment (including biological agents and small molecule drugs); Objective to evaluate the incidence and risk factors of non DTT-CD patients progressing to DTT-CD within 1 year. To further verify whether the domestic DTT-CD population is significantly different from the foreign population, and provide theoretical support for the selection of subsequent treatment options.Read full original descriptionShow less
Epidemiological Characteristics and Efficacy Evaluation of Refractory Crohn's Disease: a Multicenter, Prospective and Observational Cohort Study
Difficult to treat Crohn's disease (DTT-CD) was defined by the International Organization for the Study of Inflammatory Bowel Diseases (IOIBD) in 2023, which refers to CD patients with poor response to drug treatment and poor prognosis. Foreign epidemiological studies have shown that DTT-CD accounts for 24.8% of all CD patients, and most of them are patients with advanced treatment failure according to more than two different mechanisms. Our previous retrospective data suggested that compared with foreign DTT-CD patients, there was no significant difference in the proportion of patients with advanced treatment failure due to more than two different mechanisms, but the proportion of patients with recurrence after two intestinal resection and complex anal fistula was increased. Therefore, this project aims to determine the current prevalence and epidemiological status of DTT-CD in China; To clarify the difference in efficacy and prognosis between DTT-CD patients and non DTT-CD patients using advanced treatment (including biological agents and small molecule drugs); Objective to evaluate the incidence and risk factors of non DTT-CD patients progressing to DTT-CD within 1 year. To further verify whether the domestic DTT-CD population is significantly different from the foreign population, and provide theoretical support for the selection of subsequent treatment options.
Inclusion: The diagnosis of Crohn's disease was confirmed; Patients aged 18-65; Informed consent was obtained voluntarily.
Exclusion: Patients currently enrolled in clinical trials or receiving experimental drugs; Other contraindications to biologics or small molecule drugs (including active infection, pregnancy, etc.); Patients with short bowel syndrome; The diagnosis of CD was unclear; The clinical baseline data were missing seriously; Patients with a small bowel or colostomy.