The goal of this observational study is to determine the factors associated with a delayed diagnosis and/or an immediately complicated disease for CD patients.

A questionnaire will be completed by the patients, each questionnaire has a patient section and a physician section.

Number of patients expected : at least 600, coming from all types of practices (ANGH (expert hospitals), GETAID (expert university hospitals) and CREGG (expert private practice)).

Recruitment period : 1 year

Primary endpoint : The primary endpoint is the description of the factors linked to:

• The IBD
• The patient (see patient questionnaire in annex 1)
• The health care system
• The patient's self-care

Secondary endpoint :

• Validation of the "red flags" in a prospective cohort.
• Comparison with the EPIMAD population, especially the location and severity.

Inclusion Criteria:

• Crohn's disease diagnosed less than a year prior to inclusion
• Written consent
• Age ≥ 18 years

Exclusion Criteria:

• Diagnosis of Crohn's disease more than one year before inclusion
• Patient protected by the law
• Patient without health cover

Patients with Crohn's disease, going to ANGH (expert hospitals), GETAID (expert university hospitals) and CREGG (expert private practice) centres, who have been diagnosed within the year before the inclusion visit.