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Economic Evaluation of Oral Alendronate Therapy for Osteoporosis in Chinese Postmenopausal Women: The Impact of Medication Compliance and Persistence
  • Ruxu You,
  • Zijie Liu
Ruxu You
Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
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Zijie Liu
Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College
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Abstract

Aims: The purpose of the present research was to evaluate the cost-effectiveness of oral alendronate for individuals with osteoporosis. We also assessed the impact of medication compliance and persistence on economic outcomes of alendronate, and potential economic evaluations of persistence-enhancing interventions. Methods: We constructed an individual-level state-transition model to project health outcomes and costs of oral alendronate for Chinese postmenopausal osteoporotic women. The impact of medication compliance and persistence on economic evaluation was addressed in various scenario analyses. Model inputs were derived from clinical trials and published sources where available. Deterministic and probabilistic sensitivity analyses were conducted to explore the impact of uncertainties and assumptions on the cost-effectiveness results. Results: Compared to no treatment, alendronate treatment was associated with an additional 0.052 QALYs at an additional cost of USD 738, which yielded an ICER of USD 14,192.308/QALY. The ICER for the different scenarios (full compliance, full persistence, both full persistence and full compliance) were USD 4933.333/QALY, USD 3006.84/QALY and USD 2019.822/QALY, respectively. One-way sensitivity analysis showed the ICER was most sensitive to variations in time horizon and residual effect. Probabilistic sensitivity analysis demonstrated that, at a willingness-to-pay of USD 29,340/QALY, the probability that oral alendronate therapy will be cost-effective is approximate 80%. Conclusions: The findings support the view that oral alendronate is cost-effective for the treatment of osteoporotic fractures in Chinese postmenopausal women. Medication persistence is found to have a greater impact on cost-effectiveness than compliance, and interventions to improve persistence to be an efficient use of resources.