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The Economic and Clinical Impact of Recurring Automated Red Blood Cell Exchange to Manage Sickle Cell Disease in the
Sarah M Medland1, Jamie Bainbridge2, Matthew Cawson3
1York Health Economics Consortium Ltd, University of York, Enterprise House, Innovation Way, Heslington, York, YO10 5NQ, UK. sarah.medland@york.ac.uk.
Background/Objective:
Sickle cell disease (SCD) is a group of inherited health conditions affecting 7.74 million people worldwide. Regular automated red blood cell exchange (aRBCX) transfusions have been shown to improve control and management of SCD compared with manual RBCX (mRBCX). The aim of this study was to estimate the lifetime clinical and economic impact of aRBCX versus mRBCX in two United Kingdom-based populations with SCD (paediatrics initiated aged 5 years and adults initiated aged 38 years) that were clinically indicated for chronic disease-modifying transfusions (DMTs).
Methods:
An individual patient-level simulation model was developed to estimate lifetime quality-adjusted life years (QALYs) and healthcare costs. DMT administration programmes aligned with recommended treatment schedules. Monte Carlo methods determined baseline characteristics and clinical event occurrence. Pragmatic review findings and expert opinion informed model parameters and assumptions. Second-order probabilistic sensitivity analysis (PSA) was performed for 1000 individuals' lifetimes over 500 iterations.
Results:
Per individual, aRBCX reduced acute clinical events by 19% in both populations versus mRBCX. The time spent receiving chelation therapy reduced by 63 and 32 months for paediatric-initiated and adult-initiated individuals, respectively. Total lifetime DMT costs were reduced by £71,217 and £30,740 for paediatric-initiated and adult-initiated individuals, respectively. Overall, aRBCX increased QALYs and reduced costs by 0.29 and £112,811 in paediatric-initiated individuals and 0.24 and £61,895 in adult-initiated individuals. aRBCX was cost-effective in 100% of PSA iterations for both populations.
Conclusion:
aRBCX shows potential to improve health outcomes and reduce healthcare costs for individuals with SCD initiating a chronic DMT programme.
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