ECONOMIC BURDEN OF ANEMIA IN AN INSURED POPULATION

AR Nissenson, S Wade, T Goodnough, K Knight, and RW Dubois

J Manag Care Pharm,September 1, 2005; 11(7): 565-74.

Objective

Anemia is a common hematological disorder characterized by reduced hemoglobin concentrations. Despite information on prevalence and associated outcomes, little is known about the impact of anemia on health care utilization and costs. This study examines anemia prevalence and associated medical costs and utilization, using administrative claims for adults newly diagnosed with anemia, including up to 12 months of follow-up.

Methods

Patients predisposed to anemia, based on selected comorbid conditions (chronic kidney disease, human immunodeficiency virus, rheumatoid arthritis, inflammatory bowel disease, congestive heart failure, and solid-tumor cancers), were identified. Costs for anemic patients and a random sample of nonanemic patients with these conditions were compared. Associations were evaluated after adjustment for potential confounders using a regression model. Clinical care patterns were examined overall and by condition.

Results

Anemia was observed in 3.5% (81,423) of approximately 2.3 million health plan members in 2000; 15% of anemic patients received an identified treatment, with transfusion being the most frequent intervention. Utilization and costs were significantly higher for anemic patients (P<0.001). Average annualized per-patient costs were $14,535 for anemic patients (55% outpatient, 33% inpatient, 13% pharmacy), 54% higher than the $9,451 average cost for nonanemic patients (45% outpatient, 36% inpatient, 19% pharmacy). After adjustment for age, other comorbidities (e.g., chronic kidney disease and cancer), sex, and insurance type (indemnity, preferred provider organization/point of service, or health maintenance organization, in the Medstat MarketScan database), anemic patients had average costs that were more than twice the adjusted costs of nonanemic patients.

Conclusion

Medical costs for anemic patients are as much as twice those for nonanemic patients with the same comorbid conditions.

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