The economic implications of rasburicase treatment in pediatric tumor lysis syndrome patients

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10050 Background: Rasburicase is a recombinant urate-oxidase enzyme used to reduce high levels of plasma uric acid (UA) resulting from tumor lysis syndrome (TLS) in pediatric patients. Rasburicase reduces UA levels within 4 hours of administration, minimizing risk of serious complications from TLS. Although the efficacy of rasburicase has been demonstrated in clinical trials, there are few studies that have evaluated the economic implications of using rasburicase rather than allopurinol, the current standard of care. Methods: Pediatric patients administered rasburicase or allopurinol within 2 days of hospital admission were eligible for study inclusion. Patients were excluded if they were ≥ 18 years of age or received hemodialysis on admission. Patients receiving allopurinol or combination therapy were then propensity score matched to rasburicase patients based on gender, race, hospital type, provider type, payer type, admission source, use of electrolyte modification therapy, critical care admission, and comorbid diagnoses. Differences in healthcare costs, length of stay, and duration of subsequent critical care were assessed using gamma distributed generalized linear models with a log link function. Results: There were 63 allopurinol and 63 rasburicase patients matched in the analysis. The mean age of the sample was 7.4 years, with 27% being female. There were no statistical differences in matched covariates across the cohorts. Rasburicase patients incurred an average of $30,470 per hospitalization compared to $35,165 for allopurinol patients (p = 0.427). Mean length of stay was not statistically different across the cohorts, averaging 14 days. Duration of critical care was significantly lower for rasburicase (1.4 days) when compared to allopurinol (2.5 days, p = 0.0001). Conclusions: Treatment with rasburicase is associated with similar costs and a lower duration of critical care when compared to allopurinol therapy. [Table: see text]