EXPLorative Data Collection for Patient chAracterIzation, treatmeNt Pathways and Outcomes of IRON Preparations

Iron-deficiency

By describing the characteristics of iron deficiency (ID) patients treated with various oral or intravenous iron formulations and their outcomes, this registry will provide the medical community with important information to support treatment decisions for their patients regarding data on effectiveness, safety, tolerability, treatment persistence, quality of life, and therapeutic costs. This will ultimately support improvements to patient care, including the long-term outcomes of patients with ID.

Iron deficiency (ID) anaemia is a prevalent condition in Germany and other Western countries. It is a common complication in inflammatory bowel disease (IBD), cardiovascular disease including chronic heart failure, cancer, chronic kidney disease (CKD), gynaecological conditions, and others. Anaemia has a strong impact on patient's quality of life and ability to work, and removing the condition by increasing the haemoglobin may improve QoL and other patient-related outcomes. While in certain patient groups, such as CKD, anaemia is addressed on a routine basis, in others it remains widely undertreated. For example, in IBD patients across various European countries, iron supplementation was administered in only up to 28% of individuals. For iron supplementation aimed to replenish to body' iron stores, there are numerous oral, and intravenous preparations available. The most convenient approach is oral administration, where Fe2+ salts are mostly used. Usually low doses between 50 - 100 mg daily are recommended, as the duodenum can only absorb 10 - 20 mg daily, and higher doses are associated with gastrointestinal side effects including diarrhoea, nausea, flatulence and gastric erosions. To reduce these common side effects, Fe3+ formulations like ferric maltol (Feraccru) have been newly introduced. Intravenous preparations are all Fe3+ oxyhydroxides with a carbohydrate coat (iron dextran, gluconate, sucrose, carboxymaltose, or ferumexytol). These preparations are typically used second-line in patients with ID who had unsatisfactory treatment results under oral treatment. IV iron infusions have been associated with hypophosphataemia and hypersensitivity reactions. However these events depend on the preparation and are infrequent. EXPLAIN-IRON has been set up as the first interdisciplinary registry to add further information on the situation and management of patients who receive iron substitution in various indications: IBD, chronic kidney disease, cancer- or therapy-induced ID, gynaecological conditions (hypermenorrhoea, post-partum, fatigue), cardiological indications (congenital heart disease; chronic heart failure) and other causes of ID. The registry will allow for documentation of all approved oral and IV preparations. As the registry also serves the specific purpose to collect data on the newly introduced preparation Feraccru (oral ferric maltol), about half of the patient population will be treated with that agent. The registry will be of interest to assess to which extent the various guidelines on iron substitution have been adopted in clinical practice. Overall, EXPLAIN-IRON is expected to provide a comprehensive picture on the use and the outcomes of iron substitution in Germany. By describing the characteristics of ID patients treated with various iron formulations and their outcomes, this registry will provide the medical community with important information to support treatment decisions for their patients regarding data on effectiveness, safety, tolerability, treatment persistence, quality of life, and therapeutic costs. This will ultimately support improvements to patient care, including the long-term outcomes of patients with ID.

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