Iron Deficiency Anaemia in a Stable Chronic Intestinal Failure Cohort: Prevalence, Associations and Outcomes.

Background & Aims: Current estimates of the prevalence of iron deficiency anaemia (IDA) in patients with chronic intestinal failure (CIF) exceed those seen in general population, however, the studies to-date are limited with relatively small numbers of patients. The aim of the study was to determine the point prevalence of IDA in a large cohort of stable HPN-dependent adults managed by a specialist Intestinal Failure Unit.

Methods: This was a retrospective cohort study of HPN-dependent adults managed by a national UK IF Reference Centre between 01/01/2019 and 31/12/2019. Patients with IDA were followed up until death or the end of the follow-up on 01/05/2024.

Results: 241 patients were included in the analysis. 27/241 (11.2%) were diagnosed with IDA. Previous hypoferritinaemia, previous IDA and not receiving the recommended amount of iron via parenteral nutrition as per ESPEN guidelines were associated with higher likelihood of IDA diagnosis. Only 2/27 patients with IDA at inclusion fulfilled IDA criteria by the end of the follow up. Long-term outcomes in the patient cohort with IDA were good with no patients displaying evidence of malignancy until the end of the study period.

Conclusion: Our study shows that while IDA is common in patients with CIF, its clinical implications may differ from those in the general non-IF population. Further larger collaborative multi-centre research is necessary to confirm these findings with a view to develop evidence-based guidelines for the investigation of IDA in CIF.