Session: 902. Health Services Research—Malignant Diseases: Poster III
Hematology Disease Topics & Pathways:
Biological, antibodies, Therapies
Methods: Simulation analysis for one NHL patient over six cycles of R-CHOP using:  label-recommended administration times for all R-CHOP agents,  SC RITUX and ref-RITUX 1Q2018 average sales price (ASP, US$), and  2018 reimbursement per Current Procedural Terminology codes (US$). Costs for the proposed biosim-RITUX were extrapolated at 1% decrements of ref-RITUX ASP from 15%-35%. IV simulations were replicated for 3 BSA-adjusted doses: small (1.6m2), average (1.85m2) and large (2.1m2) patients.
Results: Following cycle 1 IV RITUX, switching to SC saves 650 min over subsequent cycles 2-6 (or 2h10 min/cycle) compared to IV-S with ref-RITUX or biosim-RITUX at BSA=1.6m2, 720 min (2h24 min/cycle) at BSA=1.85m2, and 791 min (2h38 min/cycle) at BSA=2.1m2; time-savings with SC is 425min over subsequent cycles 2-6 (1h25 min/cycle) compared to IV-R90 with ref-RITUX or biosim-RITUX across all BSA.
Costs of 6 cycles of R-CHOP if switched to SC RITUX in cycles 2-6 were $54 higher compared to ref-RITUX IV-R90 but $104 lower versus ref-RITUX IV-S at BSA=1.6m2; at BSA=1.85m2, costs for SC were $3,854 and $4,012 lower than ref-RITUX, respectively; at BSA=2.1m2, SC saved $7,762 and $7,920 over ref-RITUX, respectively.
Compared to biosim-RITUX, costs for R-CHOP treatment with SC RITUX were higher at all decrements of biosimilar discounts at BSA=1.6m2for both IV-S (range: $3,647 to $8,649) and IV-R90 (range: $3,805 to $8,807); similarly, SC RITUX costs were higher than biosim-RITUX at all decrements of biosimilar discounts at BSA=1.85m2 for both IV-S (range: $325 to $6,109) and IVR-90 (range: $484 to $6,267). At BSA=2.1m2, SC RITUX costs were higher than biosim-RITUX IV-S at discounts ≥25% (from $286 @25% to $3,569 @35%) and higher than biosim-RITUX IV-R90 at discounts ≥24% (from $116 @24% to $3,727 @35%).
Conclusions: SC RITUX for R-CHOP therapy in NHL saves time compared to ref-RITUX and biosim-RITUX via IV-S or IV-R90. Compared to ref-RITUX IV-S and ref-RITUX IV-R90, SC RITUX saves costs except compared to IV-R90 in the smallest patient (BSA=1.6m2). Costs for SC RITUX were higher than biosim-RITUX IV-S and biosim-RITUX IV-R90 in both a small and an average-sized patient at all levels of biosimilar discount. In a large patient (BSA=2.1m2), biosim-RITUX saved cost versus SC RITUX if discounted at 25% for IV-S and 24% for IV-R90.
Disclosures: Balu: Sandoz Inc.: Employment. Campbell: Sandoz Inc.: Employment. MacDonald: Sandoz: Consultancy. Abraham: Sandoz: Consultancy.
See more of: Oral and Poster Abstracts