Abstract | BACKGROUND AND OBJECTIVE: METHODS: We constructed a Markov-based decision-analytic model to evaluate the cost effectiveness of CDK4/6 inhibitors plus endocrine therapies over a 40-year lifetime from a third-party payer perspective. The model incorporated health states (progression-free disease, progressive disease, and death), major adverse events ( neutropenia), and cancer-specific and all-cause mortality. Using clinical efficacy and quality-of-life scores (utility) data from clinical trials, we estimated quality-adjusted life-years (QALYs) and incremental cost-effectiveness ratios using Medicare charges reported in US dollars per 2022 valuation and a discount rate of 3% applied to costs and outcomes. We performed deterministic and probabilistic sensitivity analyses to evaluate parametric and decision uncertainty. RESULTS: Compared to letrozole, the model estimated an increase of 5.72, 5.87, and 6.39 in QALYs and costs of $799,178, $788,168, and $741,102 in combining palbociclib, ribociclib, and abemaciclib plus letrozole, respectively. Palbociclib or ribociclib plus letrozole were dominated by abemaciclib plus letrozole. Compared with letrozole, abemaciclib plus letrozole resulted in an incremental cost-effectiveness ratio of $457,538 per QALY with an incremental cost of $553,621 and an incremental QALY gain of 1.21. The results were sensitive to the cost of abemaciclib, disease progression utility, and patients' age. CONCLUSIONS: At a willingness to pay of $100,000/QALY gained, our model predicts that combining CDK4/6 inhibitors plus letrozole is not cost effective with a marginal increase in QALYs at a high cost. Lowering the cost of these drugs or identifying patients who can receive maximal benefit from CDK4/6 inhibitors would improve the value of this regimen in patients.
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Authors | Prajakta P Masurkar, Haluk Damgacioglu, Ashish A Deshmukh, Meghana V Trivedi |
Journal | PharmacoEconomics
(Pharmacoeconomics)
Vol. 41
Issue 6
Pg. 709-718
(06 2023)
ISSN: 1179-2027 [Electronic] New Zealand |
PMID | 36920662
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Copyright | © 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG. |
Chemical References |
- ribociclib
- abemaciclib
- Letrozole
- Receptor, ErbB-2
- CDK4 protein, human
- Cyclin-Dependent Kinase 4
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Topics |
- Aged
- Humans
- Female
- United States
- Breast Neoplasms
(drug therapy, pathology)
- Letrozole
(therapeutic use)
- Cost-Effectiveness Analysis
- Postmenopause
- Medicare
- Antineoplastic Combined Chemotherapy Protocols
- Receptor, ErbB-2
(metabolism)
- Cyclin-Dependent Kinase 4
(therapeutic use)
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