Retrospective claims analysis of palliative care costs and survival in a U.S. metastatic renal cell (mRCC) population.

Abstract

433 Background: Survival and costs outcomes for patients with mRCC receiving palliative or best supportive care (BSC) after stopping active therapy have been poorly characterized. This information is important to understand how resources are utilized at the end of life and to put current treatment costs into perspective. The objective of this retrospective database analysis was to examine survival and costs associated with BSC after receiving 1 or 2 lines of mRCC treatment. Methods: A retrospective cohort analysis using claims data from commercially insured or Medicare Advantage (MCR) enrollees of a large US health plan, with medical and pharmacy benefits. The study cohort consisted of patients with an index diagnosis for RCC [ICD-9-CM 189.0] from 1/1/07 to 6/30/10 initiating any of the following treatments from 30 days prior to index date through disenrollment: sunitinib, temsirolimus, sorafenib, bevacizumab, everolimus, pazopanib, cytokines. Patients were required to have a 6 mos. continuous enrollment ± index date (patients disenrolling due to death within the 6 mos. were retained). Lines of therapy (LOT) were identified based on prescription fill and administration dates, began following the last LOT and continued until disenrollment. Health care costs reported represent the health plan + patient paid amount. Results: The overall study cohort (n=274) was 73% male; mean (±SD) age 63.3 ± 11.1 yr. with the majority of patients commercially insured (80% vs 20% MCR). The majority started BSC following 1st LOT (68% vs 32%). Median survival from start of BSC was similar following 1st and 2nd LOT (126 and 118 days). The mean (median) duration of BSC after 1 LOT was 223 (114) days and 176 (109) days for 2 LOT. Total health care costs incurred during BSC averaged $50,187 ± 96,984 and $37,294 ± 51,101 and monthly costs were similar ($10,284 ± 17979) after 1 and 2 LOT, respectively. In both cases, inpatient hospital costs represented the largest proportion of these costs (47%) while outpatient costs represented 36%. Conclusions: Our study estimating BSC survival and costs in patients with mRCC based on US claims data found monthly cost of $10, 284. These estimates suggest that BSC costs are not insignificant.