• Curr Med Res Opin · Oct 2021

    Healthcare resource utilization among patients with cold agglutinin disease in Denmark.

    • Emese K Vágó, Gina Nicholson, Erzsébet Horváth-Puhó, Naushin Hooda, Jon P Fryzek, and Jun Su.
    • Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark.
    • Curr Med Res Opin. 2021 Oct 1; 37 (10): 1829-1835.

    ObjectivesCold agglutinin disease (CAD) is a rare form of autoimmune hemolytic anemia that may manifest in complement-mediated chronic hemolytic anemia, profound fatigue, and transient agglutination-mediated circulatory symptoms. This study compared the healthcare resource utilization (HRU) of patients with CAD with a matched non-CAD comparison cohort using national Danish health registry data.MethodsAll cases of CAD were identified from 1 January 1999 to 30 June 2016, in the Danish National Patient Registry using the International Classification of Diseases, Tenth Revision, discharge diagnosis codes. A subcohort of patients with primary CAD was identified based on the absence of secondary predisposing concomitant diseases. CAD cases were matched to individuals without CAD from the general population based on birth year, sex, and 19 disease categories of the Charlson Comorbidity Index. Comparative analyses assessed inpatient hospitalizations, outpatient clinic visits, emergency room visits, transfusion use, and expensive drug use between cohorts 6 months before and 12 months after the admission date of the first hospital visit with CAD diagnosis (index date).ResultsA total of 104 patients with CAD were matched to 1003 comparison cohort members. Throughout the 12 months after the index date, patients with CAD were more likely to have at least one inpatient hospitalization (odds ratio [OR], 3.9; 95% confidence interval [CI], 2.5-6.0), outpatient clinic visit (OR, 17.2; 95% CI, 6.8-43.1), and blood transfusion (OR, 93.0; 95% CI, 33.3-259.8) than matched comparisons. HRU was similarly higher among patients with CAD than matched comparisons during the 6 months before the index date. Findings were similar among patients with primary CAD.ConclusionsCharacterization of HRU among European patients with CAD has not previously been conducted. This study shows that patients with CAD utilize significant resources in Denmark. Increased HRU uses among patients with CAD before diagnosis presents opportunities for earlier diagnosis and management.

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