Despite its known prevalence in IBD, a recent study conducted with Prof. Cacoub (unpublished) on the national health insurance database showed that iron deficiency was an under-diagnosed and under-treated co-morbidity. In chronic diseases including IBD, Transferrin Saturation Factor is only performed in approximately 10% of cases, whereas it is recommended in inflammatory situations including IBD patients (HAS 2011).

The objective of this study is therefore to obtain updated French data on the prevalence of iron deficiency in patients with IBD by applying the recommendations of ECCO and French Health High Authority (determination of ferritinemia and Transferrin Saturation Factor)

Inclusion Criteria:

• Patient, male or female, over 18 years old
• Patient present at the hospital on the day of the study
• Diagnosis of IBD on international criteria
• Patient giving written consent

Exclusion Criteria:

• Protected patient: major under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision;
• pregnant, lactating or parturient woman;
• Patient hospitalized without consent