Despite its known prevalence, a recent study conducted with Prof. Cacoub (unpublished) on the national health insurance database showed that iron deficiency was a poorly diagnosed and poorly treated comorbidity. In patients with Chronic Kidney Disease but Non-Dialysis, the determination of Ferritinemia and Transferrin Saturation Factoris performed in only 30% and 10% of cases whereas they should be performed routinely in inflammatory situations and in case of anemia (HAS 2011, KDIGO 2012). The objective of this study is to obtain updated data on the prevalence of iron deficiency in France in patients with CKD-ND, applying the international recommendations and those of the French Health High Authority (determination of ferritinemia and Transferrin Saturation Factor).

Inclusion Criteria:

• Patient, male or female, over 18 years of age;
• Patient present at the hospital on the day of the study (traditional hospitalization, week hospital, day hospital, or in consultation with CKD-ND);
• Diagnosis of CKD-ND (glomerular filtration rate (GFR) > 15 mL/min/1.73 m²)
• Patient with signed consent

Exclusion Criteria:

• Protected patient: major under guardianship, tutorship or other legal protection, deprived of liberty by judicial or administrative decision;
• Pregnant or breastfeeding woman;
• Patient with dialysis