Author(s)
Jf Mould-Quevedo, PhD, MSc, MBA, Pharmacoeconomics Manager1, Gabriela Y Vega-Hernández, Bcs, Outcomes Research Coordinator2, Javier Idrovo-Velandia, Phd, Msc, MD, Investigator3, Ruth Rivas, MSc, Quality Assurance4, Leon Zapata, Bs, Director Guia Mark4, Jorge Venegas, Bs, Sales Manager5, Helena Ramírez, Bs, Project Coordinator6, Gabriela Davila-Loaiza, MD, Clinical Research Director11Pfizer Mexico, Mexico City, Mexico; 2 Pfizer Mexico, DF, Mexico City, Mexico; 3 Insituto Nacional de Salud Pública, Cuernavaca, Morelos, Morelos, Mexico; 4 Guia Mark, México, DF, Mexico; 5 Guiamark SC, Mexico City, Mexico; 6 Guiamark SC, Mexico City, Mexico City, Mexico
Objective: In western countries AMD is considered one of the most important causes of blindness among persons over 65 years old. The purpose of this study was to determine the cost-effectiveness of pegaptanib vs verteporfin in the treatment of AMD from the health care payer's perspective. Methods: A seven-stage stochastic Markov model based on visual acuity (VA) in the better seeing-eye (stages: with clinical benefit, VA>20/40; VA:20/40-20/; VA:20/100-20/160; VA:20/200-20/500; VA<20/500 and legal blindness) was performed during a five-year period. Effectiveness measure used in the assessment was the probability to gain at least one-level of VA at the end of the follow up period. Effectiveness data was obtained from international published literature. Comparators used in the model were pegaptanib 0.3mg (8 sessions) and verteporfin 15mg (10 sessions). Resource use and cost data were obtained from hospital records and official institutional databases from the Social Security Mexican Institute (IMSS). Costs and health outcomes were discounted with a 3% annual rate. The model was calibrated. Probabilistic sensitivity analyses were performed to determine the results robustness. Results: Patients who received pegaptanib experienced a higher probability to gain at least one level of VA(57.4%; CI95%:52.26%-62.54%) compared with patients treated with verteporfin (13.8%; IC95%:10.61%-16.99%) considering an initial VA state of “>20/40”(p<0.001). Mean total costs per patient were higher in patients who received pegaptanib compared to those who received verteporfin (US$6749; CI95%:US$6401-US$7096 vs. US$6311 CI95%:US$5948-US$6674; respectively). The ICER in patients receiving pegaptanib compared to those receiving verteporfin was US$1004 (CI95% US$926-US$1090). Sensitivity analyses found that pegaptanib is a cost-saving strategy when the numbers of sessions given to the patients are less than three. Conclusion: The results show that in Mexico, pegaptanib is a cost-effective therapy for AMD when is compared with verteporfin. These results should be taken into account by Mexican decision makers in the management of patients with AMD.
Conference/Value in Health Info
2008-05, ISPOR 2008, Toronto, Ontario, Canada
Value in Health, Vol. 11, No. 3 (May/June 2008)
Code
PSS19
Topic
Economic Evaluation
Topic Subcategory
Cost/Cost of Illness/Resource Use Studies, Cost-comparison, Effectiveness, Utility, Benefit Analysis
Disease
Sensory System Disorders