Geneva, Jan. 12 -- International Clinical Trials Registry received information related to the study (ChiCTR2500115198) titled 'Real-world effectiveness and safety of upadacitinib in difficult-to-treat Crohn's disease: a multicenter study in China' on Dec. 23, 2025.

Study Type: Observational study

Study Design: Sequential

Primary Sponsor: Ruijin Hospital, Shanghai Jiao Tong University School of Medicine

Condition: Difficult-to-treat CD,DTT-CD

Recruitment Status: Not Recruiting

Phase: 4

Date of First Enrollment: 2025-12-01

Target Sample Size: Observation group:115;

Countries of Recruitment: China

To know more, visit https://www.chictr.org.cn/showproj.html?proj=298504

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