COST-EFFECTIVENESS OF INTRAVITREAL AFLIBERCEPT IN TREATING NEOVASCULAR AGE-RELATED MACULAR DEGENERATION IN SWEDEN
Author(s)
Clements KM1;Hulbert EM2;Panchmatia HR1;Eriksson M*3;Wittrup-Jensen KU4;Nilsson J5, Weinstein MC6 1OptumInsight, Cambridge, MA, USA, 2OptumInsight, Eden Prairie, MN, USA, 3Bayer AB, Solna, Sweden, 4Bayer Pharma AG, Berlin, Germany, 5OptumInsight, Stockholm, Sweden, 6Harvard School of Public Health, Boston, MA, USA
Objectives: Monthly dosing with ranibizumab (RBZ) is needed to achieve maximal sustained visual gains in patients with neovascular (“wet”) age-related macular degeneration (wAMD). In Sweden dosing is on an as-needed (PRN) basis, resulting in suboptimal efficacy. IVT-AFL dosed every 2 months (IVT-AFL Q8) demonstrated clinically equivalent efficacy compared to RBZ monthly dosing (RBZ Q4) in a randomi-zed clinical trial setting. We assessed the cost-effectiveness of IVT-AFL Q8 vs. RBZ Q4 and RBZ PRN real-life data, in a Swedish setting.
Methods: A Markov model compared wAMD treatment over two years with either IVT-AFL, RBZ Q4, or real-life RBZ PRN. Health states were based on visual acuity in the better-seeing eye; a proportion discontinued treatment monthly or upon visual acuity <20/400. Parameters were estimated from trial data, published literature, or expert opinion. Analyses were performed from a societal perspective with a lifetime horizon (starting age 77 years). The model calculated costs (drug, administration, monitoring, vision impairment, adverse events, caregiver), quality-adjusted life-years (QALYs), and incremental cost-effectiveness ratios (ICERs), all discounted 3% annually. Deterministic and probabilistic sensitivity analyses were performed.
Results: IVT-AFL cost 578,400 SEK, compared with 686,600 SEK for RBZ Q4 and 573,600 SEK for real-life RBZ PRN; QALYs totaled 4.58 for IVT-AFL, 4.59 for RBZ Q4, and 4.41 for real-life RBZ PRN. Compared with real-life RBZ PRN, IVT-AFL cost 26,700 SEK/QALY gained. RBZ Q4 cost over 20 million SEK/QALY gained compared with IVT-AFL Q8. The model was most sensitive to IVT-AFL efficacy and patient age. IVT-AFL had a 42% probability of dominating RBZ Q4 and a 100% probability of being cost-effective vs. RBZ PRN at an assumed willingness-to-pay threshold of 500,000 SEK.
Conclusion: Results suggest that, in Sweden, attainment of maximal visual gains via IVT-AFL is cost-effective compared with real-life RBZ PRN dosing. RBZ Q4 is not cost-effective relative to IVT-AFL.
Conference/Value in Health Info
2013-11, ISPOR Europe 2013, The Convention Centre Dublin
Value in Health, Vol. 16, No. 7 (November 2013)
Code
PSS28
Topic
Economic Evaluation
Topic Subcategory
Cost-comparison, Effectiveness, Utility, Benefit Analysis
Disease
Sensory System Disorders