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Antonazzo IC, Cortesi PA, Zanon E, Pasca S, Morfini M, Santoro C, De Cristofaro R, Di Minno G, Cozzolino P, Mantovani LG. Personalized Prophylaxis with myPKFiT CE: A Real-World Cost-Effectiveness Analysis in Haemophilia A Patients. MEDICINA (KAUNAS, LITHUANIA) 2023; 60:34. [PMID: 38256294 PMCID: PMC10820281 DOI: 10.3390/medicina60010034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/18/2023] [Accepted: 12/21/2023] [Indexed: 01/24/2024]
Abstract
Background and Objectives: This study aimed to assess the effectiveness and costs associated with pharmacokinetics-driven (PK) prophylaxis based on the myPKFiT® device in patients affected by hemophilia A (HA) in Italy. Materials and Methods: An observational retrospective study was conducted in three Italian hemophilia centers. All patients with moderate or severe HA, aged ≥ 18 years, capable of having PK estimated using the myPKFiT device, and who had had a clinical visit between 1 November 2019 and 31 March 2022 were included. Differences in clinical, treatment, health resources, and cost data were assessed comparing post-PK prophylaxis with pre-PK. The incremental cost-effectiveness ratio (ICER) was estimated as cost (EUR) per bleed avoided. Results: The study enrolled 13 patients with HA. The mean annual bleeding rate decreased by -1.45 (-63.80%, p = 0.0055) after the use of myPKFiT®. Overall, the consumption of FVIII IU increased by 1.73% during follow-up compared to the period prior the use of the myPKFiT. Prophylaxis based on the myPKFiT resulted in an ICER of EUR 5099.89 per bleed avoided. Conclusions: The results of our study support the idea that the use of PK data in clinical practice can be associated with an improvement in the management of patients, as well as clinical outcomes, with a reasonable increase in costs.
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Affiliation(s)
- Ippazio Cosimo Antonazzo
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (P.A.C.); (L.G.M.)
- IRCCS Istituto Auxologico Italiano, 20145 Milano, Italy
| | - Paolo Angelo Cortesi
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (P.A.C.); (L.G.M.)
- IRCCS Istituto Auxologico Italiano, 20145 Milano, Italy
| | - Ezio Zanon
- Hemophilia Center, University Hospital of Padua, 35128 Padua, Italy;
| | - Samantha Pasca
- Laboratory Medicine, Department of Biomedical Sciences, Padua University Hospital, 35128 Padua, Italy;
| | - Massimo Morfini
- Italian Association of Haemophilia Centres—AICE, 50100 Firenze, Italy;
| | | | - Raimondo De Cristofaro
- Center for Haemorrhagic and Thrombotic Diseases, Department of Medical Sciences, Catholic University School of Medicine, ‘A. Gemelli’ Hospital, 00168 Rome, Italy;
| | - Giovanni Di Minno
- Department of Clinical Medicine and Surgery, Regional Service Centre of Coagulation Disorders, ‘Federico II’ University, 80138 Naples, Italy;
| | - Paolo Cozzolino
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (P.A.C.); (L.G.M.)
| | - Lorenzo Giovanni Mantovani
- Research Centre on Public Health (CESP), University of Milan-Bicocca, 20900 Monza, Italy; (P.A.C.); (L.G.M.)
- IRCCS Istituto Auxologico Italiano, 20145 Milano, Italy
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Olasupo OO, Lowe MS, Krishan A, Collins P, Iorio A, Matino D. Clotting factor concentrates for preventing bleeding and bleeding-related complications in previously treated individuals with haemophilia A or B. Cochrane Database Syst Rev 2021; 8:CD014201. [PMID: 34407214 PMCID: PMC8407508 DOI: 10.1002/14651858.cd014201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND The hallmark of severe hemophilia (A or B) is recurrent bleeding into joints and soft tissues with progressive joint damage, despite on-demand treatment. Prophylaxis has long been used, but not universally adopted, because of medical, psychosocial, and cost controversies. OBJECTIVES To determine the effectiveness of clotting factor concentrate prophylaxis in managing previously-treated individuals with hemophilia A or B. SEARCH METHODS We searched the Cochrane Cystic Fibrosis and Genetic Disorders Group's Coagulopathies Trials Register, compiled from electronic database searches and handsearching of journals and conference abstract books. In addition, we searched MEDLINE and Embase and online trial registries. Most recent search of Group's Coagulopathies Trials Register: 24 February 2021. SELECTION CRITERIA Randomised controlled trials (RCTs) and quasi-RCTs evaluating people with hemophilia A or hemophilia B, who were previously treated with clotting factor concentrates to manage their hemophilia. DATA COLLECTION AND ANALYSIS Two authors independently reviewed trials for eligibility, assessed risk of bias and extracted data. The authors used the GRADE criteria to assess the certainty of the evidence. MAIN RESULTS Ten trials (including 608 participants) were eligible for inclusion. Eight of the trials (477 participants) had arms comparing two or more prophylactic regimens to one another and four of the trials (n = 258) compared prophylaxis to on-demand treatment (two trials had multiple arms and were included in both comparisons). Comparison of two or more prophylactic regimens For trials comparing one prophylaxis regimen to another, given the heterogeneity of the data, none of the data were pooled for this comparison. Considering the individual trials, three trials reported the primary outcome of joint bleeding, and none showed a dfference between dosing regimens (low-certainty evidence). For the secondary outcome of total bleeding events, prophylaxis with a twice-weekly regimen of FIX likely results in reduced total bleeds compared to a once-a-week regimen of the same dose, mean difference (MD) 11.2 (5.81 to 16.59) (one trial, 10 participants, low-certainty evidence). Transient low-titer anti-FVIII inhibitors were reported in one of the trials. Blood-transmitted infections were not identified. Other adverse events reported include hypersensitivity, oedema, and weight gain. These were, however, rare and unrelated to study drugs (very low-certainty evidence). Comparison of prophylactic and on-demand regimens Four of the trials (258 participants) had arms that compared prophylaxis to on-demand treatment. Prophylaxis may result in a large decrease in the number of joint bleeds compared to on-demand treatment, MD -30.34 (95% CI -46.95 to -13.73) (two trials, 164 participants, low-certainty evidence). One of these trials (84 participants) also reported the long-term effects of prophylaxis versus on-demand therapy showing improved joint function, quality of life, and pain; but no differences between groups in joint structure when assessed by magnetic resonance imaging (MRI). In one trial (84 participants) validated measures for joint health and pain assessment showed that prophylaxis likely improves joint health compared to an on-demand regimen with an estimated change difference of 0.94 points (95% CI 0.23 to 1.65) and improves total pain scores, MD -17.20 (95% CI -27.48 to -6.92 (moderate-certainty evidence). Two trials (131 participants) reported that prophylaxis likely results in a slight increase in adverse events, risk ratio 1.71 (1.24 to 2.37) (moderate-certainty evidence). No inhibitor development and blood-transmitted infections were identified. Overall, the certainty of the body of evidence was judged to be low because of different types of bias that could have altered the effect. AUTHORS' CONCLUSIONS: There is evidence from RCTs that prophylaxis, as compared to on-demand treatment, may reduce bleeding frequency in previously-treated people with hemophilia. Prophylaxis may also improve joint function, pain and quality of life, even though this does not translate into a detectable improvement of articular damage when assessed by MRI. When comparing two different prophylaxis regimens, no significant differences in terms of protection from bleeding were found. Dose optimization could, however, result in improved efficacy. Given the heterogeneity of the data, pooled estimates were not obtained for most comparisons. Well-designed RCTs and prospective observational controlled studies with standardised definitions and measurements are needed to establish the optimal and most cost-effective treatment regimens.
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Affiliation(s)
- Omotola O Olasupo
- Department of Health Research Methods, Evidence and Impact (HEI), McMaster University, Hamilton, Canada
| | - Megan S Lowe
- Department of Health Sciences, McMaster University, Hamilton, Canada
| | - Ashma Krishan
- School of Health Sciences, Division of Population Health, Health Services Research & Primary Care, University of Manchester, Manchester, UK
| | - Peter Collins
- Arthur Bloom Haemophilia Centre, Heath Park, School of Medicine, Cardiff University, Cardiff, UK
| | - Alfonso Iorio
- Department of Health Research Methods, Evidence and Impact (HEI), McMaster University, Hamilton, Canada
| | - Davide Matino
- Department of Internal Medicine, McMaster University, Hamilton, Canada
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Park YS, Hwang TJ, Cho GJ, Kim SK, Park SK, Kim JY, Baek HJ, Kim Y, Lee H, Shin J, Nam C, Sun J, Yoo KY. Patients' and parents' satisfaction with, and preference for, haemophilia A treatments: a cross-sectional, multicentre, observational study. Haemophilia 2021; 27:563-573. [PMID: 34128300 PMCID: PMC8362144 DOI: 10.1111/hae.14304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 03/08/2021] [Accepted: 03/15/2021] [Indexed: 01/18/2023]
Abstract
INTRODUCTION Reports on patients' satisfaction and preferred characteristics for treatments would be worthwhile when choosing an optimal treatment reflecting patients' perspectives. AIM To identify the characteristics and treatment patterns of patients with haemophilia A, or their caregivers, in Korea and explore patient preferences and satisfaction with their treatment. METHODS This cross-sectional, multicentre, observational study was conducted from April 2018 to September 2019 at six nationwide hospitals and three Korea Hemophilia Foundation clinics. Patients aged ≥16 years, or legal caregivers of paediatric patients, who had used factor VIII (FVIII) concentrates for ≥1 month were enrolled. Satisfaction with treatment was measured using the Treatment Satisfaction Questionnaire for Medication (TSQM); preference was evaluated using discrete choice experiment (DCE), with 10 series of two hypothetical treatment options created from D-efficient block design, which varied across five attributes. RESULTS Overall, 505 patients (mean age 31 years) were enrolled in the study. Patients had received FVIII concentrate for an average of 102.9 months (prophylaxis: 53.5%; on-demand: 22.2%). Mean TSQM scores were 64.6 (effectiveness domain), 97.9 (side effects), 57.1 (convenience) and 66.8 (global satisfaction). The number of vials per injection, and the frequency of drug administration, was significantly associated with treatment satisfaction. According to DCE, simpler treatment options were preferred by patients/caregivers. CONCLUSION The lowest satisfaction levels were shown in the treatment convenience domain. Patients/parents preferred simpler and easier treatment characteristics. In an attempt to enhance the overall satisfaction of patients and caregivers with treatment, consideration of more convenient characteristics is required in future decisions regarding treatment selection.
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Affiliation(s)
- Young Shil Park
- Department of PediatricsKyung Hee University Hospital at GangdongSeoulSouth Korea
| | - Tai Ju Hwang
- Korea Hemophilia Foundation Gwangju ClinicGwang‐JuSouth Korea
| | - Goon Jae Cho
- Korea Hemophilia Foundation Busan ClinicBusanSouth Korea
| | - Soon Ki Kim
- Department of PediatricsInha University HospitalIncheonSouth Korea
| | - Sang Kyu Park
- Department of PediatricsUlsan University HospitalUlsanSouth Korea
| | - Ji Yoon Kim
- Department of PediatricsKyungpook National University HospitalDaeguSouth Korea
- Department of Pediatric Hematology and OncologyKyungpook National University Chilgok HospitalDaeguSouth Korea
| | - Hee Jo Baek
- Department of PediatricsChonnam National University Hwasun HospitalChonnam National University Medical SchoolGwangjuSouth Korea
| | - Young‐Joo Kim
- Medical DepartmentPfizer Pharmaceuticals Korea LtdSeoulSouth Korea
| | - Ho‐Jin Lee
- Medical DepartmentPfizer Pharmaceuticals Korea LtdSeoulSouth Korea
| | - Ji‐Soo Shin
- Medical DepartmentPfizer Pharmaceuticals Korea LtdSeoulSouth Korea
| | - Chung‐Mo Nam
- Department of Biostatistics and ComputingYonsei UniversitySeoulSouth Korea
| | - Jiyu Sun
- Department of Biostatistics and ComputingYonsei UniversitySeoulSouth Korea
| | - Ki Young Yoo
- Korea Hemophilia Foundation Clinic (KHF ClinicSeoulSouth Korea
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Zahedi Z, Karimi M, Keshavarz K, Haghpanah S, Ravangard R. A cost-effectiveness analysis of the prophylaxis versus on-demand regimens in severe hemophilia A patients under 12 years old in southern Iran. ACTA ACUST UNITED AC 2021; 26:240-248. [PMID: 33594948 DOI: 10.1080/16078454.2021.1885123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE This study aimed to compare the cost-effectiveness of these two regimens in hemophilia A patients, under-12-years-old in southern Iran. METHODS A cost-effectiveness study comparing prophylaxis versus on-demand was conducted on 34 hemophilia patients (24 and 10 patients were on the prophylaxis and on-demand regimens respectively) in 2017. The Markov model was used to estimate the economic and clinical outcomes. The costs were collected from the societal perspective, and the utility criterion was the 'quality adjusted life year (QALY)' indicator. The required data were collected using a researcher-made cost checklist, the EQ5D standard questionnaire and Hemophilia Joint Health Score. The probabilistic sensitivity analysis (PSA) was performed to determine the robustness of the results. RESULTS The means of costs, joint health score and QALY in the prophylaxis regimen were $478,963.1 purchasing power parity (PPP), 96.67, and 11.98 respectively, and in the on-demand regimen were $521,797.2 PPP, 93.46 and 10.99 respectively. The PSA confirmed the robustness of the model's results. The results of the scatter plots and acceptability curves showed that the prophylaxis regimen in 97% of the simulations for the thresholds below $20950 PPP was more cost-effective than on-demand regimen. CONCLUSION Prophylaxis regimen showed the lower costs and higher effectiveness and utility in comparison with the on-demand regimen. It is recommended that prophylaxis should be considered as the standard care for treatment of hemophilic patients.
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Affiliation(s)
- Zohreh Zahedi
- Student Research Committee, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehran Karimi
- Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Khosro Keshavarz
- Health Human Resources Research Center, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sezaneh Haghpanah
- Hematology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ramin Ravangard
- Health Human Resources Research Center, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Gene therapy in hemophilia A: a cost-effectiveness analysis. Blood Adv 2019; 2:1792-1798. [PMID: 30042145 DOI: 10.1182/bloodadvances.2018021345] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 06/29/2018] [Indexed: 01/19/2023] Open
Abstract
Gene therapy provides a potential phenotypic cure for hemophilia, yet the cost of this novel treatment is high, tempering enthusiasm and raising questions regarding cost vs benefit. To evaluate the cost-effectiveness of gene therapy treatment of severe hemophilia A compared with prophylaxis with factor VIII (FVIII), we developed a Markov state-transition model to estimate the costs and effectiveness of severe hemophilia A treatment strategies from a United States health care system perspective. Quality-adjusted life-years (QALYs) were the effectiveness measure. In the base case, hypothetical cohorts of 30-year-old patients received gene therapy or FVIII prophylaxis. We obtained model probabilities and utilities from the literature and costs from Medicare reimbursement data. One-way and probabilistic sensitivity analyses were performed to test the robustness of results. Over a 10-year time horizon, total per-person gene therapy strategy costs were $1.0M and resulted in 8.33 QALYs, whereas prophylaxis cost $1.7M and resulted in 6.62 QALYs. Thus, gene therapy dominated prophylaxis (costs less and was more effective). Gene therapy remained dominant unless initial costs exceeded $1.6M and were <$100 000 per 1 QALY gained compared with prophylaxis if initial costs were <$1.7M. Results were not sensitive to variation of all other parameters over clinically plausible ranges. In a probabilistic sensitivity analysis simultaneously varying all parameters 3000 times over parameter distributions, gene therapy was dominant in 92% of model iterations. Treatment of severe hemophilia A with gene therapy is likely to be cost-saving or cost-effective compared with FVIII prophylaxis.
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Vepsäläinen K, Riikonen P, Lassila R, Arola M, Huttunen P, Lähteenmäki P, Möttönen M, Selander T, Martikainen J. Long-term clinical and economic outcomes in previously untreated paediatric patients with severe haemophilia A: A nationwide real-world study with 700 person-years. Haemophilia 2018; 24:436-444. [DOI: 10.1111/hae.13447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2018] [Indexed: 11/28/2022]
Affiliation(s)
- K. Vepsäläinen
- Department of Paediatrics; Kuopio University Hospital; Kuopio Finland
| | - P. Riikonen
- Department of Paediatrics; Kuopio University Hospital; Kuopio Finland
| | - R. Lassila
- Coagulation Disorders Unit; Department of Haematology; Comprehensive Cancer Centre; European Haemophilia Comprehensive Care Centre; Helsinki University Hospital; University of Helsinki; Helsinki Finland
| | - M. Arola
- Department of Paediatrics; Tampere University Central Hospital; Tampere Finland
| | - P. Huttunen
- Children's Hospital; Helsinki University Hospital; European Haemophilia Comprehensive Care Centre; Helsinki Finland
| | - P. Lähteenmäki
- Department of Paediatrics and Adolescent Medicine; Turku University Central Hospital; University of Turku; Turku Finland
| | - M. Möttönen
- Department of Children and Adolescents; PEDEGO Research Centre, and Medical Research Centre Oulu; Oulu University Hospital; University of Oulu; Oulu Finland
| | - T. Selander
- Science Service Centre; Kuopio University Hospital; Kuopio Finland
| | - J. Martikainen
- Pharmacoeconomics and Outcome Research Unit (PHORU); School of Pharmacy; University of Kuopio; Kuopio Finland
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Thomson T, Strandberg-Larsen M, Gater A. Haemophilia B: impact on patients and economic burden of disease. Thromb Haemost 2017; 106:398-404. [DOI: 10.1160/th11-03-0193] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 06/18/2011] [Indexed: 11/05/2022]
Abstract
SummaryWorldwide, haemophilia is the most common hereditary bleeding disorder. The incidence of haemophilia B, however, is considerably less than haemophilia A and consequently appears to have received less attention in the research literature. This article aims to summarise the available evidence documenting the patient and economic burden associated with haemophilia B and current methods of disease management. Both the immediate and long-term clinical consequences of haemophilia B can have significant implications for patients in terms of functional limitations and diminished health-related quality of life (HRQOL). Evidence demonstrates that primary prophylaxis is the optimal strategy for replacing missing clotting factor IX (FIX) and managing haemophilia B. Use of recombinant FIX (rFIX) over plasma-derived FIX (pd-FIX) is also generally preferred for safety reasons. Prophylaxis using currently available rFIX products, however, requires a demanding regimen of intravenous infusions 2–3 times a week which may have significant implications for adherence and ultimately the long-term efficacy of such regimens. Only limited assessments of the cost-effectiveness of prophylactic versus on-demand FIX treatment regimens have been conducted to date. Prophylaxis, however, is generally more costly as greater quantities of FIX are consumed. Any reduction in FIX replacement dosing frequency is expected to improve patient adherence and contribute to improved clinical outcomes, further supporting the costeffectiveness of such interventions. Although a rare disease, as economic constraints for healthcare increase, generating further information regarding the key clinical, patient and economic outcomes associated with haemophilia B will be essential for supporting improvements in care for people with haemophilia B.
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COST-UTILITY ANALYSIS OF PRIMARY PROPHYLAXIS, COMPARED WITH ON-DEMAND TREATMENT, FOR PATIENTS WITH SEVERE HEMOPHILIA TYPE A IN COLOMBIA. Int J Technol Assess Health Care 2016; 32:337-347. [DOI: 10.1017/s0266462316000544] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Objectives: This article presents a cost-utility analysis from the Colombian health system perspective comparing primary prophylaxis to on-demand treatment using exogenous clotting factor VIII (FVIII) for patients with severe hemophilia type A.Methods: We developed a Markov model to estimate expected costs and outcomes (measured as quality-adjusted life-years, QALYs) for each strategy. Transition probabilities were estimated using published studies; utility weights were obtained from a sample of Colombian patients with hemophilia and costs were gathered using local data. Both deterministic and probabilistic sensitivity analysis were performed to assess the robustness of results.Results: The additional cost per QALY gained of primary prophylaxis compared with on-demand treatment was 105,081,022 Colombian pesos (COP) (55,204 USD), and thus not considered cost-effective according to a threshold of up to three times the current Colombian gross domestic product (GDP) per-capita. When primary prophylaxis was provided throughout life using recombinant FVIII (rFVIII), which is much costlier than FVIII, the additional cost per QALY gained reached 174,159,553 COP (91,494 USD).Conclusions: using a decision rule of up to three times the Colombian GDP per capita, primary prophylaxis (with either FVIII or rFVIII) would not be considered as cost-effective in this country. However, a final decision on providing or preventing patients from primary prophylaxis as a gold standard of care for severe hemophilia type A should also consider broader criteria than the incremental cost-effectiveness ratio results itself. Only a price reduction of exogenous FVIII of 50 percent or more would make primary prophylaxis cost-effective in this context.
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Fischer K, Lewandowski D, Janssen MP. Modelling lifelong effects of different prophylactic treatment strategies for severe haemophilia A. Haemophilia 2016; 22:e375-82. [PMID: 27353496 DOI: 10.1111/hae.13019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND Lifelong prophylactic replacement therapy with clotting factor concentrates is recommended for severe haemophilia. The prophylactic dose determines both clinical outcome and treatment cost. In the absence of clinical studies, computer simulation was used to explore lifelong effects and clotting factor consumption for various prophylactic dose levels, and optimize strategies for switching between prophylactic and on-demand treatment. DESIGN AND METHODS Individual patients' lifetime joint bleeds, radiological arthropathy (Pettersson score, 0-78) and consumption were simulated for each treatment strategy. Treatment effectiveness (expressed as % of patients maintaining a lifetime Pettersson score ≤14) and clotting factor consumption were modelled for lifelong prophylaxis at dose levels 1000-4500 IU kg(-1) year(-1) , for on-demand treatment and for switching strategies. Treatment efficiency (consumption per unit of effectiveness) was used to compare strategies. RESULTS Compared to lifelong on-demand treatment, lifelong prophylaxis at 1000 IU kg(-1) year(-1) increased effectiveness from 21 to 36%, at an additional consumption of 0.9 × 10(6) IU kg(-1) . For lifelong prophylaxis, each additional 1000 IU kg(-1) year(-1) resulted in a proportional increase in consumption by ±5 × 10(6) IU kg(-1) but a less than proportional reduction in arthropathy by ±50%; consequently, increasing consumption progressively diminished treatment efficiency. Switching strategies slightly reduce effectiveness and consumption. Optimum switching criteria were similar across prophylactic dose levels. CONCLUSION According to the simulation model, low-dose prophylaxis (1000 IU kg(-1) year(-1) ) improved outcome at a limited increase in consumption compared to on-demand treatment. Increasing prophylactic dose further improved health outcomes, but at decreasing efficiency. Optimal prophylactic dose should therefore be selected balancing acceptable health impact and available budget.
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Affiliation(s)
- K Fischer
- Julius Center for Health Sciences and Primary care, University Medical Center Utrecht, Utrecht, The Netherlands. .,Van Creveldkliniek, University Medical Center Utrecht, Utrecht, The Netherlands.
| | - D Lewandowski
- Julius Center for Health Sciences and Primary care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - M P Janssen
- Julius Center for Health Sciences and Primary care, University Medical Center Utrecht, Utrecht, The Netherlands.,Research Division, Transfusion Technology Assessment Department, Sanquin Blood Supply Foundation, Amsterdam, The Netherlands
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Carcao M, Srivastava A. Factor VIII/factor IX prophylaxis for severe hemophilia. Semin Hematol 2016; 53:3-9. [DOI: 10.1053/j.seminhematol.2015.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2004] [Revised: 11/05/2004] [Accepted: 12/01/2005] [Indexed: 11/11/2022]
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Abrahamyan L, Willan AR, Beyene J, Mclimont M, Blanchette V, Feldman BM. Using value-of-information methods when the disease is rare and the treatment is expensive--the example of hemophilia A. J Gen Intern Med 2014; 29 Suppl 3:S767-73. [PMID: 25029970 PMCID: PMC4124117 DOI: 10.1007/s11606-014-2880-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Hemophilia A is a rare, sex-linked genetic disorder treated with intravenous administration of factor VIII (FVIII) to prevent bleeding; however, approaches vary across and within countries. Value-of-information (VOI) methods identify situations in which the cost-benefit evidence is sufficient to adopt one treatment strategy over another; when the evidence is insufficient, VOI methods provide the optimal sample size for additional research. OBJECTIVE The objective of the study was to use VOI methods in a cost-benefit decision context to evaluate the current evidence in support of using (1) alternate day prophylaxis (AP), (2) tailored prophylaxis (TP) or (3) on-demand treatment (OD) with FVIII to prevent arthropathy in children with severe hemophilia A. METHODS To apply VOI methods, several parameters such as incidence, time horizon for the decision, costs, and threshold values to avoid MRI-detected joint damage or arthropathy were defined. Two baseline threshold values of willingness to pay for avoiding arthropathy--$200,000 and $400,000--were selected for comparing the treatment strategies. RESULTS For threshold values < $200,000, OD had a higher expected net benefit than either prophylaxis strategy, and the evidence was sufficient for its adoption. For threshold values > $400,000 prophylaxis strategies had higher expected net benefit; however, a new trial with 38 patients per arm was needed to compare AP and TP, yielding an expected net gain of over $17 million. In sensitivity analyses, the results were robust to assumptions regarding discount rate, trial fixed and variable costs, enrollment fraction, and the time horizon. CONCLUSIONS In rare diseases, evidence is often scarce and insufficient for decision making. In considering the funding of new research and patient reimbursement in rare diseases, VOI methodology may provide more relevant determinations of the value and costs of additional research, compared to standard frequentist methods.
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Affiliation(s)
- Lusine Abrahamyan
- />Toronto Health Economics and Technology Assessment Collaborative, University of Toronto, Toronto, Ontario Canada
| | - Andrew R. Willan
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
- />The Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario Canada
| | - Joseph Beyene
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
- />The Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario Canada
- />Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario Canada
- />Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario Canada
- />Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario Canada
| | - Marjorie Mclimont
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
| | - Victor Blanchette
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
- />Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario Canada
| | - Brian M. Feldman
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
- />The Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario Canada
- />Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario Canada
- />Departments of Paediatrics, Division of Rheumatology, The Hospital for Sick Children, Toronto, Ontario Canada
| | - for the Canadian Hemophilia Primary Prophylaxis (CHPS) Study Group
- />Toronto Health Economics and Technology Assessment Collaborative, University of Toronto, Toronto, Ontario Canada
- />Child Health Evaluative Sciences Program, The SickKids Research Institute, 555 University Avenue, Toronto, Ontario M5G 1X8 Canada
- />The Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario Canada
- />Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario Canada
- />Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario Canada
- />Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario Canada
- />Departments of Paediatrics, Division of Rheumatology, The Hospital for Sick Children, Toronto, Ontario Canada
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Saulyte Trakymiene S, Steen Carlsson K. On-demand treatment in persons with severe haemophilia. Eur J Haematol 2014; 76:39-47. [PMID: 24957106 DOI: 10.1111/ejh.12373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2014] [Indexed: 02/06/2023]
Abstract
There are two main modes of replacement therapy for haemophilia patients: either to stop bleeding (on-demand) or regular infusions of clotting factor to prevent bleeds (prophylaxis). Fifty yr of clinical experience have provided evidence of the superiority of prophylaxis by showing a reduction in bleeds and development of arthropathy. Prophylaxis has been described extensively in terms of efficacy and health-economic aspects; however, on-demand treatment has received less attention. The aim of this study was to critically review the published literature on PubMed and discuss potential gaps of knowledge in on-demand treatment in persons with severe haemophilia without inhibitors by focusing on two key aspects: how on-demand treatment is provided and what outcome measures have been reported. We identified 134 papers of which 112 were excluded. Of the remaining 22 papers, 16 were comparative studies between prophylaxis and on-demand treatment and six were descriptions of on-demand treatment. The results showed limited reporting on data related to the key aspects of treatment on-demand. Early studies looked at degrees of joint bleeds and different treatment regimens in finding the optimal dose. However, from the late 1980s, there was almost no research into on-demand therapy except efficacy and safety studies of new rFVIII products and studies to prove superiority of prophylaxis over treatment on-demand. The success of on-demand therapy may depend on several factors, for example time to initial dose after a bleed and duration of treatment. Data on these key factors are limited and highlight the necessity of research to optimise replacement therapy.
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Affiliation(s)
- Sonata Saulyte Trakymiene
- Faculty of Medicine, Vilnius University, Vilnius, Lithuania; Centre for Pediatric Hematology/Oncology, Children's Hospital, Affiliate of Vilnius University Hospital Santariskiu Klinikos, Vilnius, Lithuania
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13
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Carcao M. Changing paradigm of prophylaxis with longer acting factor concentrates. Haemophilia 2014; 20 Suppl 4:99-105. [DOI: 10.1111/hae.12405] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2014] [Indexed: 01/16/2023]
Affiliation(s)
- M. Carcao
- Division of Haematology/Oncology; Department of Pediatrics; Child Health Evaluative Sciences; Research Institute; The Hospital for Sick Children; Toronto ON Canada
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14
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Fischer K, Lewandowski D, Janssen MP. Estimating unknown parameters in haemophilia using expert judgement elicitation. Haemophilia 2013; 19:e282-8. [PMID: 23672712 DOI: 10.1111/hae.12166] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2013] [Indexed: 11/30/2022]
Abstract
The increasing attention to healthcare costs and treatment efficiency has led to an increasing demand for quantitative data concerning patient and treatment characteristics in haemophilia. However, most of these data are difficult to obtain. The aim of this study was to use expert judgement elicitation (EJE) to estimate currently unavailable key parameters for treatment models in severe haemophilia A. Using a formal expert elicitation procedure, 19 international experts provided information on (i) natural bleeding frequency according to age and onset of bleeding, (ii) treatment of bleeds, (iii) time needed to control bleeding after starting secondary prophylaxis, (iv) dose requirements for secondary prophylaxis according to onset of bleeding, and (v) life-expectancy. For each parameter experts provided their quantitative estimates (median, P10, P90), which were combined using a graphical method. In addition, information was obtained concerning key decision parameters of haemophilia treatment. There was most agreement between experts regarding bleeding frequencies for patients treated on demand with an average onset of joint bleeding (1.7 years): median 12 joint bleeds per year (95% confidence interval 0.9-36) for patients ≤ 18, and 11 (0.8-61) for adult patients. Less agreement was observed concerning estimated effective dose for secondary prophylaxis in adults: median 2000 IU every other day The majority (63%) of experts expected that a single minor joint bleed could cause irreversible damage, and would accept up to three minor joint bleeds or one trauma related joint bleed annually on prophylaxis. Expert judgement elicitation allowed structured capturing of quantitative expert estimates. It generated novel data to be used in computer modelling, clinical care, and trial design.
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Affiliation(s)
- K Fischer
- Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands.
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15
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Abstract
Hemophilia has evolved from an often fatal hereditary bleeding disorder to a disorder for which safe and effective treatment is available. However, there are several challenges remaining in the treatment of hemophilia. Prophylaxis to prevent bleeding is costly and requires frequent intravenous injections, which are cumbersome for patients. Venous access is often difficult to achieve, especially in small children where central venous lines may need to be implanted. Development of inhibitory antibodies makes treatment of acute bleeds difficult and prophylaxis in patients with inhibitors must also be better addressed. In order to improve treatment, new products are being developed, some of which are already in clinical trials. There are several approaches to prolonging half-lives such as PEGylation, Fc fusion and albumin fusion. Increased activity has been demonstrated in preclinical trials for factor IX and in a human trial with factor VII where the activity of the molecules has been increased by manipulation of the molecular composition. Additional approaches, including blockage of inhibitors of clotting, are also under investigation. Factor VIII and factor IX gene therapy have become a tangible possibility since phase I data recently have been published. Results are promising and there is hope that in the near future substantial progress will be made, perhaps making hemophilia the first genetic condition to be cured.
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Affiliation(s)
- Karin Knobe
- Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, SE-205 02 Malmö, Sweden
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16
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Farrugia A, Cassar J, Kimber MC, Bansal M, Fischer K, Auserswald G, O'Mahony B, Tolley K, Noone D, Balboni S. Treatment for life for severe haemophilia A- A cost-utility model for prophylaxis vs. on-demand treatment. Haemophilia 2013; 19:e228-38. [DOI: 10.1111/hae.12121] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2013] [Indexed: 02/06/2023]
Affiliation(s)
| | - J. Cassar
- Faculty of Health; University of Canberra; Canberra; Australia
| | - M. C. Kimber
- Plasma Protein Therapeutics Association; Annapolis; MD; USA
| | - M. Bansal
- Plasma Protein Therapeutics Association; Annapolis; MD; USA
| | - K. Fischer
- Van Creveldkliniek, University Medical Center Utrecht; Utrecht; The Netherlands
| | - G. Auserswald
- Ambulanz fuer Thrombose und Haemostasestoerungen Prof.- Hess Kinderklink; Klinikum Bremen-Mitte; Germany
| | | | - K. Tolley
- Tolley Health Economics Ltd; Derbyshire; UK
| | - D. Noone
- Irish Haemophilia Society; Dublin; Ireland
| | - S. Balboni
- Plasma Protein Therapeutics Association; Annapolis; MD; USA
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17
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Gupta S, Siddiqi AEA, Soucie JM, Manco-Johnson M, Kulkarni R, Lane H, Ingram-Rich R, Gill JC. The effect of secondary prophylaxis versus episodic treatment on the range of motion of target joints in patients with haemophilia. Br J Haematol 2013; 161:424-33. [PMID: 23432684 DOI: 10.1111/bjh.12267] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 01/11/2013] [Indexed: 11/29/2022]
Abstract
This study prospectively compared the effect of secondary prophylaxis to episodic treatment on target joint (TJ) range of motion (ROM), number of joint haemorrhages and new TJ development in patients with moderate or severe haemophilia. Two-hundred and eighty-six males, 17% in prophylaxis, 83% in episodic treatment group, participating in the Centers for Disease Control and Prevention's Universal Data Collection project, fulfilled inclusion criteria: age >2 years at enrollment, free of TJs at enrollment, developed at least one TJ after enrollment, and received either prophylaxis or episodic treatment continuously for two follow-up visits after TJ development. The outcomes of interest - percentage change in TJ ROM, number of joint haemorrhages and new TJ development, were modelled using multivariate linear, Poisson and logistic regression techniques respectively. Individuals who received secondary prophylaxis in comparison to episodic treatment were younger at TJ development (P < 0.01); there was no difference in the decrease in TJ ROM between the two groups (P = 0.9). Factors significantly associated with a higher rate of haemarthroses included episodic treatment, severe haemophilia, age >5 years at TJ development, obesity and inhibitor negative status. Secondary prophylaxis significantly decreased haemarthroses but was not associated with a significant improvement in TJ ROM or with new TJ development.
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Affiliation(s)
- Sweta Gupta
- Indiana Hemophilia and Thrombosis Center, Indianapolis, IN 46260, USA.
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18
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Tu TC, Liou WS, Chou TY, Lin TK, Lee CF, Chen JD, Cham TM, Chung MI. Prevalence, incidence, and factor concentrate usage trends of hemophiliacs in Taiwan. Yonsei Med J 2013; 54:71-80. [PMID: 23225801 PMCID: PMC3521284 DOI: 10.3349/ymj.2013.54.1.71] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Hemophilia A and B (HA, HB) are the most common X-linked inherited bleeding disorders. The introduction of factor concentrates has allowed for control of the lifelong chronic disease. However, no studies have been published regarding the epidemiology of hemophilia in Taiwan. Our aim was to determine the prevalence, incidence, and mortality rate, as well as trends in the use of factor concentrates, in individuals with hemophilia in Taiwan. MATERIALS AND METHODS A retrospective study was conducted using the National Health Insurance Research Database between 1997 and 2007. RESULTS We identified 988 males with hemophilia (HA : HB ratio=5.4 : 1). The mean prevalence per 100000 males was 6.7 ± 0.1 for HA and 1.2 ± 0.1 for HB. The estimated mean annual incidence per live male birth was 1 in 10752 for HA and 1 in 47619 for HB. Standardized mortality ratios for males with hemophilia (all severities) or severe hemophilia were 1.3- and 2.1-fold higher than that of the general male population, respectively. Mean factor VIII (FVIII) and factor IX (FIX) usage was 1.5003 ± 0.4029 and 0.3126 ± 0.0904 international units (IUs) per capita, respectively. Mean FVIII and FIX usage per patient with hemophilia (all severities) or severe hemophilia was 44027 ± 11532 and 72341 ± 17298, respectively, and 49407 ± 13015 and 74369 ± 18411 IUs per person with HA or HB, respectively. CONCLUSION Our data revealed epidemiologic and factor concentrate usage trends in males with hemophilia in Taiwan, highlighting a need for improvements in the mandatory National Health Insurance registry. A better- designed, patient-centered registry system would enable more detailed patient information collection and analysis, improving subsequent care.
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Affiliation(s)
- Tsu-Chiang Tu
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Wen-Shyong Liou
- Department of Pharmacy, Taichung Veterans General Hospital, Taichung, Taiwan
- College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Tsui-Yun Chou
- The Hemophilia Care and Research Center, Tri-Service General Hospital, Taipei, Taiwan
| | - Tsung-Kun Lin
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Chuan-Fang Lee
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Jye-Daa Chen
- Department of Pharmacy Practice, Tri-Service General Hospital, Taipei, Taiwan
| | - Thau-Ming Cham
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mei-Ing Chung
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
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19
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Brown SA, Barnes C, Curtin J, Dunkley S, Ockelford P, Phillips J, Rowell J, Smith M, Tran H. How we use recombinant activated Factor VII in patients with haemophilia A or B complicated by inhibitors. Intern Med J 2012; 42:1243-50. [DOI: 10.1111/j.1445-5994.2012.02942.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 08/16/2012] [Indexed: 01/19/2023]
Affiliation(s)
- S. A. Brown
- Department of Haematology and Oncology; Royal Children's Hospital; Brisbane
- Department of Haematology; Pathology Queensland; Brisbane Queensland Australia
| | - C. Barnes
- Haemophilia Treatment Centre; Royal Childrens' Hospital; Parkville Victoria
| | - J. Curtin
- Haematology Department; Childrens' Hospital; Westmead
| | - S. Dunkley
- Haemophilia Treatment Centre; Royal Prince Alfred Hospital; Camperdown New South Wales Australia
| | - P. Ockelford
- Adult Haemophilia Treatment Centre; Auckland Hospital; Auckland
| | - J. Phillips
- Haematology; Wellington Hospital; Wellington New Zealand
| | - J. Rowell
- Haemophilia Centre; Royal Brisbane and Women's Hospital; Brisbane Queensland Australia
| | - M. Smith
- Haematology, Canterbury District Health Board; Christchurch Hospital; Christchurch New Zealand
| | - H. Tran
- Haemophilia Treatment Centre; Prahran Victoria Australia
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20
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Miners AH. Economic evaluations of prophylaxis with clotting factor for people with severe haemophilia: why do the results vary so much? Haemophilia 2012; 19:174-80. [DOI: 10.1111/hae.12009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2012] [Indexed: 12/17/2022]
Affiliation(s)
- A. H. Miners
- Lecturer in Health Economics, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine; London; UK
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21
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Abstract
Although the funding of rare diseases such as haemophilia in developing countries remains a low priority, pressures on the funding of haemophilia treatment are also emerging in developed economies affected by the global economic downturn and the other demands on health care budgets. This is leading advisory bodies and payers alike to explore the tools of Health Technology Assessment (HTAs) in deriving recommendations for reimbursement policies. In particular, the use of cost utility analysis (CUA) in deriving costs per quality adjusted life year (QALY) for different interventions is being used to rank interventions in order of priorities relative to a threshold cost per QALY. In these exercises, rare chronic disorders such as haemophilia emerge as particularly unattractive propositions for reimbursement, as the accepted methodology of deriving a CUA. For e.g. the use of prophylaxis in haemophilia leads to a range of costs/QALY which exceed the willingness to pay thresholds of most payers. In this commentary, we review the principles utilized in a recent systematic review of the use of haemophilia products carried out in Sweden as part of an HTA. We suggest that ranking haemophilia related interventions with the standard interventions of therapeutics and public health in CUA comparisons is inappropriate. Given that haemophilia treatment is a form of blood replacement therapy, we propose that such comparisons should be made with the interventions of mainstream blood transfusion. We suggest that unequivocally effective treatments such as haemophilia therapies should be assessed differently from mainstream interventions, that new methodologies are required for these kinds of diseases and that evidence of a societal willingness to support people with rare disorders needs to be recognized when reimbursement policies are developed.
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Affiliation(s)
- A Farrugia
- Plasma Protein Therapeutics Association, Annapolis, MD, USA.
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22
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Feldman BM, Berger K, Bohn R, Carcao M, Fischer K, Gringeri A, Hoots K, Mantovani L, Willan AR, Schramm W. Haemophilia prophylaxis: how can we justify the costs? Haemophilia 2012; 18:680-4. [PMID: 22507524 DOI: 10.1111/j.1365-2516.2012.02790.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Severe haemophilia results in increased mortality and poorer quality of life. Factor prophylaxis leads to a more normal life, but is very costly; most of the cost is due to the high cost of replacement factor. Despite its high cost, factor prophylaxis has been adopted throughout the developed world--even in different health care systems. We argue that there are at least five possible reasons why societies may value factor prophylaxis despite its cost: (i) it is directed towards an inherited disease, (ii) the treatment is largely directed towards children, (iii) the disease is rare and the overall cost to society is small, (iv) the treatment is preventative, and v) the high cost is largely the result of providing safe products. In an era of rising health care costs, there is a strong research agenda to establish the factors that determine the value of expensive therapies for rare diseases like haemophilia.
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Affiliation(s)
- B M Feldman
- Division of Rheumatology, The Hospital for Sick Children, Department of Pediatrics, Institute of Health Policy Management & Evaluation, and the Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
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23
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BERNTORP E, ASTERMARK J, BAGHAEI F, BERGQVIST D, HOLMSTRÖM M, LJUNGBERG B, NORLUND A, PALMBLAD J, PETRINI P, STIGENDAL L, SÄWE J. Treatment of haemophilia A and B and von Willebrand’s disease: summary and conclusions of a systematic review as part of a Swedish health-technology assessment. Haemophilia 2011; 18:158-65. [DOI: 10.1111/j.1365-2516.2011.02723.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Baker JR, Riske B, Voutsis M, Cutter S, Presley R. Insurance, home therapy, and prophylaxis in U.S. youth with severe hemophilia. Am J Prev Med 2011; 41:S338-45. [PMID: 22099356 DOI: 10.1016/j.amepre.2011.09.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 08/19/2011] [Accepted: 09/06/2011] [Indexed: 11/30/2022]
Abstract
BACKGROUND Home infusion therapy, particularly on a prophylactic regimen, is linked with reduced morbidity among youth with severe hemophilia. However, the association of insurance coverage with these home therapies is unknown. PURPOSE This study explores the connections among insurance, home infusion therapy, and prophylaxis treatment in a nationwide cohort of 3380 boys and young men (aged 2 to 20 years) with severe hemophilia. These youth obtained care at one of 129 federally supported hemophilia treatment centers (HTCs), and enrolled in the CDC's bleeding disorder surveillance project. METHODS Multiple regression was used to analyze the independent association among risk factors, including insurance, and both home infusion and prophylaxis. Data were obtained between January 1, 2008, and December 31, 2010, and analyzed in 2011. RESULTS Ninety percent used home therapy and 78% a prophylaxis regimen. Only 2% were uninsured. Health insurance was significantly associated with prophylaxis, but not with home therapy. Lower prophylaxis utilization rates were independently associated with having Medicaid, "other," and no insurance as compared to having private insurance. Race, age, inhibitor status, and HTC utilization were also independently associated with both home therapy and prophylaxis. CONCLUSIONS Youth with severe hemophilia who annually obtain care within the U.S. HTC network had a high level of health insurance, home therapy, and prophylaxis. Exploration of factors associated with insurance coverage and yearly HTC utilization, and interventions to optimize home infusion and prophylaxis among youth of African-American and "other" race/ethnic backgrounds are warranted.
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Affiliation(s)
- Judith R Baker
- Department of Pediatric Hematology/Oncology, University of California Los Angeles, Los Angeles, California 90095, USA.
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25
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Iorio A, Marchesini E, Marcucci M, Stobart K, Chan AK. Clotting factor concentrates given to prevent bleeding and bleeding-related complications in people with hemophilia A or B. Cochrane Database Syst Rev 2011:CD003429. [PMID: 21901684 DOI: 10.1002/14651858.cd003429.pub4] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND The hallmark of severe hemophilia is recurrent bleeding into joints and soft tissues with progressive joint damage, notwithstanding on-demand treatment. Prophylaxis has long been used but not universally adopted because of medical, psychosocial, and cost controversies. OBJECTIVES To determine the effectiveness of clotting factor concentrate prophylaxis in the management of people with hemophilia A or B. SEARCH STRATEGY We searched the Cochrane Cystic Fibrosis and Genetic Disorders Group's Coagulopathies Trials Register. In addition, we searched major electronic databases (MEDLINE, EMBASE, CENTRAL), handsearched relevant journals and abstract books and reference lists of relevant articles.Last search of Group's Coagulopathies Trials Register: 07 April 2011. SELECTION CRITERIA Randomised controlled trials and quasi-randomised controlled trials evaluating people with severe hemophilia A or hemophilia B receiving prophylactic clotting factor concentrates. DATA COLLECTION AND ANALYSIS Two authors independently reviewed studies for eligibility, assessed risk of bias and extracted data. MAIN RESULTS Six studies (including 142 participants) were eligible for inclusion. Two compared three-times-a-week prophylactic administration with on-demand treatment in children with hemophilia. Pooled results from these two studies showed a rate ratio of 0.30 (95% confidence interval; 0.12 to 0.76) for all bleedings and 0.22 (95% confidence interval 0.08 to 0.63) for joint bleedings favouring prophylaxis. Results on the number of patients with preserved joints after three to seven years of follow-up were not pooled due to significant heterogeneity. Three of the remaining four studies evaluated hemophilia A; one showed a statistically significant decrease in frequency of joint bleeds with prophylaxis compared to placebo, with a rate difference of -10.73 (95% confidence interval -16.55 to -4.91) bleeds per year. Two studies compared two prophylaxis regimens, failing to demonstrate an advantage of one regimen over the other in terms of bleeding frequency. The fourth study evaluated hemophilia B and showed fewer joint bleeds with weekly (15 IU/kg) versus bi-weekly (7.5 IU/kg) prophylaxis, rate difference -3.30 (95% confidence interval -5.50 to -1.10) bleeds per year. Non-significant increases in both inhibitor and infectious complications were observed in patients on prophylaxis, which occurred more often when using long-term venous access. AUTHORS' CONCLUSIONS There is strong evidence from randomised controlled trials and observational trials that prophylaxis preserves joint function in children with hemophilia as compared to on-demand treatment. There is insufficient evidence from randomised controlled trials to confirm the observational evidence that prophylaxis decreases bleeding and related complications in patients with existing joint damage. Well-designed randomised controlled trials and prospective observational controlled studies are needed to establish the best prophylactic regimen and to assess the effectiveness of prophylactic clotting factor concentrates in adult patients.
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Affiliation(s)
- Alfonso Iorio
- Clinical Epidemiology and Biostatistic Department, McMaster University, 1280 Main Street West, CRL - 140, Hamilton, ON, Canada, L8S 4K1
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26
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Abstract
Haemophilia A and B are X-linked bleeding disorders due to the inherited deficiency of factor VIII or factor IX, respectively. Of the approximately 1 per 5000-10000 male births affected by haemophilia, 80% are deficient in factor VIII and 20% are deficient in factor IX. Haemophilia is characterized by spontaneous and provoked joint, muscle, gastrointestinal and CNS bleeding leading to major morbidity and even mortality if left untreated or under-treated. The evolution of haemophilia management has been marked by tragedy and triumph over recent decades. Clotting factors and replacement strategies continue to evolve for patients without inhibitors. For patients with an inhibitor, factor replacement for acute bleeding episodes and immune tolerance, immune modulation and extracorporeal methods for inhibitor reduction are the cornerstone of care. In addition, adjuvant therapies such as desmopressin, antifibrinolytics and topical agents also contribute to improved outcomes for patients with and without inhibitors. The future direction of haemophilia care is promising with new longer-acting clotting factors and genetic therapies, including gene transfer and premature termination codon suppressors. With these current and future treatment modalities, the morbidity and mortality rates in patients with haemophilia certainly will continue to improve.
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Affiliation(s)
- Trisha Wong
- Puget Sound Blood Center, Seattle, Washington, USA
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27
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Gringeri A, Lundin B, von Mackensen S, Mantovani L, Mannucci PM. A randomized clinical trial of prophylaxis in children with hemophilia A (the ESPRIT Study). J Thromb Haemost 2011; 9:700-10. [PMID: 21255253 DOI: 10.1111/j.1538-7836.2011.04214.x] [Citation(s) in RCA: 346] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Prevention of arthropathy is a major goal of hemophilia treatment. While studies in adults have demonstrated an impact of prophylaxis on the incidence of joint bleeds and patients' well-being in terms of improved quality of life (QoL), it is unclear whether or not prophylaxis influences the outcome and perception of well- of children with hemophilia. OBJECTIVE This randomized controlled study compared the efficacy of prophylaxis with episodic therapy in preventing hemarthroses and image-proven joint damage in children with severe hemophilia A (factor VIII <1%) over a 10-year time period. METHODS Forty-five children with severe hemophilia A, aged 1-7 years (median 4), with negative clinical-radiologic joint score at entry and at least one bleed during the previous 6 months, were consecutively randomized to prophylaxis with recombinant factor VIII (25 IU kg(-1) 3 × week) or episodic therapy with ≥25 IU kg(-1) every 12-24 h until complete clinical bleeding resolution. Safety, feasibility, direct costs and QoL were also evaluated. RESULTS Twenty-one children were assigned to prophylaxis, 19 to episodic treatment. Children on prophylaxis had fewer hemarthroses than children on episodic therapy: 0.20 vs. 0.52 events per patient per month (P < 0.02). Plain-film radiology showed signs of arthropathy in six patients on prophylaxis (29%) vs. 14 on episodic treatment (74%) (P < 0.05). Prophylaxis was more effective when started early (≤36 months), with patients having fewer joint bleeds (0.12 joint bleeds per patient per month) and no radiologic signs of arthropathy. CONCLUSION This randomized trial confirms the efficacy of prophylaxis in preventing bleeds and arthropathy in children with hemophilia, particularly when it is initiated early in life.
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Affiliation(s)
- A Gringeri
- Department of Medicine and Medical Specialities, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico and University of Milan, Milan, Italy.
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28
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Fischer K, Pouw ME, Lewandowski D, Janssen MP, van den Berg HM, van Hout BA. A modeling approach to evaluate long-term outcome of prophylactic and on demand treatment strategies for severe hemophilia A. Haematologica 2011; 96:738-43. [PMID: 21273268 DOI: 10.3324/haematol.2010.029868] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Severe hemophilia requires life-long treatment with expensive clotting factor concentrates; studies comparing effects of different therapeutic strategies over decades are very difficult to perform. A simulation model was developed to evaluate the long-term outcome of on demand, prophylactic and mixed treatment strategies for patients with severe hemophilia A. DESIGN AND METHODS A computer model was developed based on individual patients' data from a Dutch cohort study in which intermediate dose prophylaxis was used and a French cohort study in which on demand treatment was used, and multivariate regression analyses. This model simulated individual patients' life expectancy, onset of bleeding, life-time joint bleeds, radiological outcome and concentrate use according to the different treatment strategies. RESULTS According to the model, life-time on demand treatment would result in an average of 1,494 joint bleeds during the hemophiliac's life, and consumption of 4.9 million IU of factor VIII concentrate. In contrast, life-time intermediate dose prophylaxis resulted in a mean of 357 joint bleeds and factor consumption of 8.3 million IU. A multiple switch strategy (between prophylactic and on demand treatment based on bleeding pattern) resulted in a mean number of 395 joint bleeds and factor consumption of 6.6 million IU. The estimated proportion of patients with Pettersson scores over 28 points was 32% for both the prophylactic and the multiple switching strategies, compared to 76% for continuous on demand treatment. CONCLUSIONS The present model allows evaluation of the impact of various treatment strategies on patients' joint bleeds and clotting factor consumption. It may be expanded with additional data to allow more precise estimates and include economic evaluations of treatment strategies.
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Affiliation(s)
- Kathelijn Fischer
- Julius Center for Health Sciences and Primary Care, Room Str. 6.131, PO Box 85090, 3508 GA Utrecht, The Netherlands.
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29
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30
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LIOU WS, TU TC, CHENG SN, CHOU TY, LEE CF, LIN TK, CHUNG MI, CHAM TM. Secondary prophylaxis treatment versus on-demand treatment for patients with severe haemophilia A: comparisons of cost and outcomes in Taiwan. Haemophilia 2010; 17:45-54. [DOI: 10.1111/j.1365-2516.2010.02367.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Rodriguez NI, Hoots WK. Advances in hemophilia: experimental aspects and therapy. Hematol Oncol Clin North Am 2010; 24:181-98. [PMID: 20113902 DOI: 10.1016/j.hoc.2009.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This article describes recent clinical and research advances in hemophilia therapy. Different prophylactic regimens for the management of severe hemophilia are described along with the use of adjuvant treatment options to achieve hemostasis. The safety and efficacy of radionuclide synovectomy with phosphorus 32-sulfur colloid to treat existing joint arthropathy also are described. The development of inhibitors to factor VIII or IX remains a challenge for hemophilia care and recent approaches to achieve immune tolerance induction are discussed. Finally, recent advances in hemophilia are mentioned, including the role of iron, inflammation, and angiogenesis in the pathogenesis of hemophilic arthropathy.
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Affiliation(s)
- Nidra I Rodriguez
- Division of Pediatrics, Hematology Section, The University of Texas Health Science Center, 6411 Fannin, Houston, TX 77030, USA.
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32
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Richards M, Williams M, Chalmers E, Liesner R, Collins P, Vidler V, Hanley J. A United Kingdom Haemophilia Centre Doctors' Organization guideline approved by the British Committee for Standards in Haematology: guideline on the use of prophylactic factor VIII concentrate in children and adults with severe haemophilia A. Br J Haematol 2010; 149:498-507. [PMID: 20230411 DOI: 10.1111/j.1365-2141.2010.08139.x] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Consensus-based guidelines supported by the literature are presented on the role of prophylactic administration of factor VIII concentrate in children and adults with severe haemophilia A. The timing of initiation of prophylaxis, the choice of prophylactic regimen, monitoring, management of breakthrough bleeding and education of the patient and family are discussed.
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CARCAO M, CHAMBOST H, LJUNG R. Devising a best practice approach to prophylaxis in boys with severe haemophilia: evaluation of current treatment strategies. Haemophilia 2010; 16 Suppl 2:4-9. [DOI: 10.1111/j.1365-2516.2009.02196.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chambost H. Prophylaxis in patients with haemophilia: introduction. Haemophilia 2010; 16 Suppl 2:1-3. [PMID: 20132331 DOI: 10.1111/j.1365-2516.2009.02195.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- H Chambost
- Service d'Hématologie Pédiatrique, Hôpital d'Enfants La Timone, Université de la Méditerranée, Marseille, France.
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Cost-effectiveness of prophylaxis against on-demand treatment in boys with severe hemophilia A in Iran. Int J Technol Assess Health Care 2009; 25:584-7. [DOI: 10.1017/s0266462309990420] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Objective: The aim of this study was to assess the incremental cost-effectiveness of on-demand versus prophylactic hemophilia therapy in Iran from a third-party payers’ perspective.Methods: A retrospective chart review of twenty-five type A hemophiliacs who were treated in three hemophilia treatment centers was conducted. The patients were boys 0–9 years old receiving one of two treatments: (i) prophylaxis with concentrate at clinic; (ii) concentrate at clinic as on-demand. Fourteen boys received on-demand infusions for bleeding events, and eleven boys received infusions prophylaxis. Data were extracted from documents in the hemophilia treatment centers during a period of approximately 6 months.Results: The patients receiving prophylactic treatment had fewer bleeding events each month (mean, 0.26 versus 2.74) but used more concentrate (225.31 versus 87.20 units/kg per month). Average monthly cost per patient in the prophylaxis group was approximately 1.9 times higher than in the on-demand group. Compared with on-demand infusion, prophylaxis costs 3,201,656 Rials (€213.45) per bleeding event prevented.Conclusion: Prophylactic care markedly reduces the number of bleeding episodes, but at considerable cost.
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Siegmund B, Richter H, Pollmann H. Need for Prophylactic Treatment in Adult Haemophilia A Patients. ACTA ACUST UNITED AC 2009; 36:283-288. [PMID: 20877667 DOI: 10.1159/000225965] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Accepted: 03/02/2009] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND METHODS: A single centre study including 52 German patients aged ≥16 years with severe haemophilia A was performed to compare the amount of clotting factor and outcome between on-demand therapy (26 patients) and continuous prophylaxis (26 patients) over 1 year. RESULTS: Prophylaxis reduced the number of bleeds significantly. Compared to on-demand treatment (20.5 ± 3.0 bleeds/year/patient), under prophylaxis 7.8 ± 1.3 bleeds/year/patient were observed. Joint bleeds were reduced from 12.2 ± 1.5 to 4.7 ± 1.0/year/ patient. In the on-demand group 38% of the patients suffered from more than 2 bleeds/month, whereas in the prophylaxis group no patient was found with more than 2 bleeds/month. Mean annual factor VIII (FVIII) consumption increased from 767 ± 110 IU/kg body weight under on-demand treatment to 2,841 ± 341 IU/kg body weight under continuous prophylaxis, displaying a nearly fourfold increase in FVIII consumption. Furthermore, prophylaxis implies a more than four-fold increase in treatment days which escalated from a mean weekly injection rate of 0.56 ± 0.08 FVIII injections/week when bleeds were treated on demand to 2.52 ± 0.30 FVIII injections/week during prophylaxis. CONCLUSION: Even though the results reflect a benefit also for prophylactically treated patients regarding their bleeding frequency, one has to take into account a substantial increase of the costs for coagulation concentrates when all patients with severe haemophilia A switch to continuous prophylaxis.
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Shapiro A, Gruppo R, Pabinger I, Collins PW, Hay CRM, Schroth P, Casey K, Patrone L, Ehrlich H, Ewenstein BM. Integrated analysis of safety and efficacy of a plasma- and albumin-free recombinant factor VIII (rAHF-PFM) from six clinical studies in patients with hemophilia A. Expert Opin Biol Ther 2009; 9:273-83. [PMID: 19216617 DOI: 10.1517/14712590902729392] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Hemophilia A is an X-linked bleeding disorder that results from insufficient levels of factor VIII (FVIII) coagulant activity. OBJECTIVE To evaluate the efficacy and safety of ADVATE rAHF-PFM (Baxter Healthcare Corporation), a recombinant FVIII concentrate manufactured without human or bovine blood-derived additives, and to assess the effect of compliance with prophylactic use in preventing bleeding episodes (BEs). METHODS Clinical data were integrated from six prospective studies. Two hundred thirty-four hemophilia A subjects (FVIII levels < or = 2%) (median age 14.7 (range: 0.02 - 72.7) years) were included. RESULTS BEs were managed with one or two infusions and nearly all (1953/1956) responded to treatment. Compliance with a prophylactic treatment regimen significantly reduced the incidence of BEs (p = 0.0061) and prevented non-traumatic joint BEs (median annualized BE rate was 0). One previously treated subject developed an inhibitor; no other safety concerns were observed. CONCLUSIONS These results reinforce the efficacy and safety of rAHF-PFM and suggest that compliance is an essential contributor to the effectiveness of prophylaxis in the treatment of hemophilia A.
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Affiliation(s)
- Amy Shapiro
- Indiana Hemophilia and Thrombosis Center, 8402 Harcourt Rd, Suite 420, Indianapolis, IN 46260, USA.
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38
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HOOTS WK, EBBESEN LS, KONKLE BA, AUERSWALD GKH, ROBERTS HR, WEATHERALL J, FERRAN JM, LJUNG RCR. Secondary prophylaxis with recombinant activated factor VII improves health-related quality of life of haemophilia patients with inhibitors. Haemophilia 2008; 14:466-75. [DOI: 10.1111/j.1365-2516.2008.01654.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Risebrough N, Oh P, Blanchette V, Curtin J, Hitzler J, Feldman BM. Cost-utility analysis of Canadian tailored prophylaxis, primary prophylaxis and on-demand therapy in young children with severe haemophilia A. Haemophilia 2008; 14:743-52. [PMID: 18422610 DOI: 10.1111/j.1365-2516.2008.01664.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Primary prophylaxis is the emerging standard treatment for boys with severe haemophilia. Tailored (escalating-dose) prophylaxis (EscDose), beginning at a low frequency and escalating with repeated bleeding may prevent arthropathy at a lower cost than standard prophylaxis (SP). From a societal perspective, we compared the incremental cost per joint-haemorrhage that is avoided and quality-adjusted-life-year (QALY) gained of SP and EscDose to on-demand (Demand) therapy in severe haemophilia A boys treated to age 6 using a decision analytic model. Costs included factor VIII (FVIII), professional visits and tests, central venous placement/complications, hospitalization, home programmes and parents' lost work-days. Resource utilization was estimated by surveying 17 Canadian clinics. The natural history of bleeding and other probabilities were determined from a longitudinal chart review (n = 24) and published literature. EscDose costs an additional $3192 per joint-haemorrhage that was avoided compared with Demand whereas SP costs an additional $9046 per joint-haemorrhage that was avoided compared with EscDose. Clinic costs and lost wages were reduced by 60-80% for EscDose and SP compared with Demand. EscDose attained more QALYs than SP and Demand on account of less bleeding than Demand and lower need for ports than SP. The incremental cost per QALY for EscDose vs. Demand was $542 938. EscDose was less expensive with similar QALYs compared to SP. Sensitivity analysis was performed on all probability- and cost-estimates, and showed the model was sensitive to the cost of FVIII and the SP and target joint utilities. In conclusion, prophylaxis will substantially improve clinical outcomes and quality of life compared to Demand treatment, but with substantial cost.
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Affiliation(s)
- N Risebrough
- HOPE Research Centre, Division of Clinical Pharmacology, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada.
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40
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Abstract
This article describes recent clinical and research advances in hemophilia therapy. Different prophylactic regimens for the management of severe hemophilia are described along with the use of adjuvant treatment options to achieve hemostasis. The safety and efficacy of radionuclide synovectomy with phosphorus 32-sulfur colloid to treat existing joint arthropathy also are described. The development of inhibitors to factor VIII or IX remains a challenge for hemophilia care and recent approaches to achieve immune tolerance induction are discussed. Finally, recent advances in hemophilia are mentioned, including the role of iron, inflammation, and angiogenesis in the pathogenesis of hemophilic arthopathy.
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Affiliation(s)
- Nidra I Rodriguez
- Division of Pediatrics, Hematology Section, The University of Texas Health Science Center, 6411 Fannin, Houston, TX 77030, USA.
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41
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42
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Nicholson A, Berger K, Bohn R, Carcao M, Fischer K, Gringeri A, Hoots K, Mantovani L, Schramm W, van Hout BA, Willan AR, Feldman BM. Recommendations for reporting economic evaluations of haemophilia prophylaxis: a nominal groups consensus statement on behalf of the Economics Expert Working Group of The International Prophylaxis Study Group. Haemophilia 2007; 14:127-32. [PMID: 18005148 DOI: 10.1111/j.1365-2516.2007.01562.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The need for clearly reported studies evaluating the cost of prophylaxis and its overall outcomes has been recommended from previous literature. OBJECTIVES To establish minimal ''core standards'' that can be followed when conducting and reporting economic evaluations of hemophilia prophylaxis. METHODS Ten members of the IPSG Economic Analysis Working Group participated in a consensus process using the Nominal Groups Technique (NGT). The following topics relating to the economic analysis of prophylaxis studies were addressed; Whose perspective should be taken? Which is the best methodological approach? Is micro- or macro-costing the best costing strategy? What information must be presented about costs and outcomes in order to facilitate local and international interpretation? RESULTS The group suggests studies on the economic impact of prophylaxis should be viewed from a societal perspective and be reported using a Cost Utility Analysis (CUA) (with consideration of also reporting Cost Benefit Analysis [CBA]). All costs that exceed $500 should be used to measure the costs of prophylaxis (macro strategy) including items such as clotting factor costs, hospitalizations, surgical procedures, productivity loss and number of days lost from school or work. Generic and disease specific quality of lífe and utility measures should be used to report the outcomes of the study. CONCLUSIONS The IPSG has suggested minimal core standards to be applied to the reporting of economic evaluations of hemophilia prophylaxis. Standardized reporting will facilitate the comparison of studies and will allow for more rational policy decisions and treatment choices.
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Affiliation(s)
- A Nicholson
- Child Health Evaluative Sciences, The Hospital for Sick Children, Toronto, ON, Canada
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43
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Hoots WK, Rodriguez N, Boggio L, Valentino LA. Pathogenesis of haemophilic synovitis: clinical aspects. Haemophilia 2007; 13 Suppl 3:4-9. [PMID: 17822514 DOI: 10.1111/j.1365-2516.2007.01533.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Arthropathy remains a major cause of morbidity in patients with haemophilia. Frequent bleeding into the joints leads to joint damage with resultant contractures, joint deformities and arthritis. This in turn leads to muscle atrophy, limited physical activity, osteoporosis and disability. Even though several studies of prophylactic factor replacement for persons with severe haemophilia demonstrate improved joint function, this therapy is still not readily available to most people with haemophilia around the world and a universal treatment protocol has not been used. In this article, we discuss key issues in the treatment of severe haemophilia: the optimal timing of initiation and termination of therapy, dosing options and goals of therapy. The options for countries where prophylaxis is not readily available are also discussed. Most studies are small and not randomized making consensus treatment recommendations difficult to formulate. Randomized, clinical trials are needed to provide the answers regarding the optimal treatment of patients with severe haemophilia.
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Affiliation(s)
- W K Hoots
- Gulf States Haemophilia and Thrombophilia Center, The University of Texas Health Science Center, Houston, TX 77030, USA.
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44
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Konkle BA, Ebbesen LS, Erhardtsen E, Bianco RP, Lissitchkov T, Rusen L, Serban MA. Randomized, prospective clinical trial of recombinant factor VIIa for secondary prophylaxis in hemophilia patients with inhibitors. J Thromb Haemost 2007; 5:1904-13. [PMID: 17723130 DOI: 10.1111/j.1538-7836.2007.02663.x] [Citation(s) in RCA: 256] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Hemophilic patients with factor VIII (FVIII) and FIX inhibitors suffer from frequent bleeding episodes and reduced quality of life. OBJECTIVES To evaluate whether secondary prophylaxis with activated recombinant factor VII (rFVIIa) can safely and effectively reduce bleeding frequency as compared to conventional on-demand therapy. METHODS Thirty-eight male patients entered a 3-month preprophylaxis period to confirm high baseline bleeding frequency (mean > or = 4 bleeds per month). Twenty-two patients were randomized 1:1 to receive daily rFVIIa prophylaxis with either 90 or 270 microg kg(-1) for 3 months, followed by a 3-month postprophylaxis period. RESULTS Bleeding frequency was reduced by 45% and 59% during prophylaxis with 90 and 270 microg kg(-1), respectively (P < 0.0001); however, there was no significant difference detected between doses. The majority of this reduction was maintained during the postprophylaxis period. Although all types of bleed were similarly reduced, the effect was most pronounced for spontaneous joint bleeds. Patients reported significantly fewer hospital admissions and days absent from work/school during prophylaxis as compared to the preprophylaxis period. No thromboembolic events were reported during prophylaxis. CONCLUSION Clinically relevant reductions in bleeding frequency during prophylaxis as compared to conventional on-demand therapy were achieved without raising safety concerns. These results provide evidence for the concept of secondary rFVIIa prophylaxis in inhibitor patients with frequent bleeds.
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Affiliation(s)
- B A Konkle
- Penn Comprehensive Hemophilia Program, University of Pennsylvania, PA 19104, USA.
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45
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Manco-Johnson MJ, Abshire TC, Shapiro AD, Riske B, Hacker MR, Kilcoyne R, Ingram JD, Manco-Johnson ML, Funk S, Jacobson L, Valentino LA, Hoots WK, Buchanan GR, DiMichele D, Recht M, Brown D, Leissinger C, Bleak S, Cohen A, Mathew P, Matsunaga A, Medeiros D, Nugent D, Thomas GA, Thompson AA, McRedmond K, Soucie JM, Austin H, Evatt BL. Prophylaxis versus episodic treatment to prevent joint disease in boys with severe hemophilia. N Engl J Med 2007; 357:535-44. [PMID: 17687129 DOI: 10.1056/nejmoa067659] [Citation(s) in RCA: 1397] [Impact Index Per Article: 82.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Effective ways to prevent arthropathy in severe hemophilia are unknown. METHODS We randomly assigned young boys with severe hemophilia A to regular infusions of recombinant factor VIII (prophylaxis) or to an enhanced episodic infusion schedule of at least three doses totaling a minimum of 80 IU of factor VIII per kilogram of body weight at the time of a joint hemorrhage. The primary outcome was the incidence of bone or cartilage damage as detected in index joints (ankles, knees, and elbows) by radiography or magnetic resonance imaging (MRI). RESULTS Sixty-five boys younger than 30 months of age were randomly assigned to prophylaxis (32 boys) or enhanced episodic therapy (33 boys). When the boys reached 6 years of age, 93% of those in the prophylaxis group and 55% of those in the episodic-therapy group were considered to have normal index-joint structure on MRI (P=0.006). The relative risk of MRI-detected joint damage with episodic therapy as compared with prophylaxis was 6.1 (95% confidence interval, 1.5 to 24.4). The mean annual numbers of joint and total hemorrhages were higher at study exit in the episodic-therapy group than in the prophylaxis group (P<0.001 for both comparisons). High titers of inhibitors of factor VIII developed in two boys who received prophylaxis; three boys in the episodic-therapy group had a life-threatening hemorrhage. Hospitalizations and infections associated with central-catheter placement did not differ significantly between the two groups. CONCLUSIONS Prophylaxis with recombinant factor VIII can prevent joint damage and decrease the frequency of joint and other hemorrhages in young boys with severe hemophilia A. (ClinicalTrials.gov number, NCT00207597 [ClinicalTrials.gov].).
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46
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Fischer K, Grobbee DE, van den Berg HM. RCTs and observational studies to determine the effect of prophylaxis in severe haemophilia. Haemophilia 2007; 13:345-50. [PMID: 17610546 DOI: 10.1111/j.1365-2516.2007.01521.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It has been suggested that more RCTs should be conducted in the evaluation of haemophilia treatment, including prophylaxis. To draw valid conclusions from experimental or observational studies, internal validity should be ensured. In particular, similarity of prognosis between treatment groups compared in a particular study is needed. Because the use of prophylaxis in observational studies is nonrandomized by definition, special efforts should be made to achieve comparability of prognosis, that is, to avoid 'confounding by indication'; in RCTs this is ensured by randomized allocation of treatment. However, the high costs of an RCT results in a limitation of both patient numbers and length of follow up. Observational studies tend to be more generalizable and cheaper, as they may include a wider spectrum of morbidities, use treatment protocols in agreement with routine care, and use available data. Therefore, observational studies can be much larger and of longer duration than RCTs; and are the preferred design for the evaluation of long term treatment effects. Several valid observational studies comparing prophylaxis and on demand treatment have reported both a short term reduction of 75-90% in bleeding frequency, and significant improvement in arthropathy, quality of life, and socioeconomic parameters after more than 20 years of prophylactic treatment. RCTs provide the most powerful tool for the evaluation of short term effects of any treatment, but are infeasible for the evaluation of long term effects. The definitive assessment of the long-term benefits of prophylaxis requires observational studies that should be performed according to rigorous standards.
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Affiliation(s)
- K Fischer
- Van Creveldkliniek, Department of Haematology, UMCU, Utrecht, The Netherlands.
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47
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Hacker MR, Page JH, Shapiro AD, Rich-Edwards JW, Manco-Johnson MJ. Central venous access device infections in children with hemophilia: a comparison of prophylaxis and episodic therapy. J Pediatr Hematol Oncol 2007; 29:458-64. [PMID: 17609623 DOI: 10.1097/mph.0b013e318068b1d6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Prophylaxis was recommended as the optimal treatment regimen for severe hemophilia by several expert committees. This led to increased utilization of prophylaxis and, subsequently, central venous access devices (CVADs). Although prophylaxis is the preferred treatment, episodic therapy is used by many. CVADs are employed to facilitate administration of prophylactic and episodic infusions; however, there are no data on the risk of CVAD-related infections for prophylaxis compared with episodic therapy. Data from the Study for the Prevention of Joint Disease in Preschool Children with Severe Hemophilia, a randomized clinical trial of prophylaxis versus episodic therapy, were used to evaluate the association between CVAD-related infection and treatment. The crude and adjusted rate ratios for first CVAD-related infection per 1000 CVAD days associated with episodic therapy versus prophylaxis were 1.42 (95% confidence interval: 0.46-4.40) and 1.23 (95% confidence interval: 0.33-4.56), respectively. Although we cannot make a definitive statement about treatment and CVAD-related infection risk, this study suggests that prophylaxis likely does not put children at higher risk of CVAD-related infection than episodic therapy. Given the need for CVADs in some children and the benefits of prophylaxis, we conclude there is no reason to recommend against prophylaxis on the basis of existing knowledge of CVAD-related infection risk.
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Affiliation(s)
- Michele R Hacker
- Mountain States Regional Hemophilia and Thrombosis Center, University of Colorado, Denver, USA.
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48
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Affiliation(s)
- M D Carcao
- Division of Haematology/Oncology, Department of Paediatrics, Hospital for Sick Children, University of Toronto, Toronto, Canada.
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49
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Evatt BL. The natural evolution of haemophilia care: developing and sustaining comprehensive care globally. Haemophilia 2006; 12 Suppl 3:13-21. [PMID: 16683992 DOI: 10.1111/j.1365-2516.2006.01256.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Comprehensive care is vital for patients with haemophilia to prevent early death and free patients from the complications that inhibit living normal lives. Experience has shown that once introduced in a country, there is a progressive restoration of normal healthy lives to the haemophilia community. Accompanying this progress is a gradual decreased dependency on the haemophilia comprehensive centre - except during brief periods when expertise contained within the comprehensive centre is mandatory for life-saving clinical management or to prevent severe morbidity. During each stage of the natural evolution of comprehensive haemophilia care in a country, challenges to the existence of the centre occur, which threaten the comprehensive treatment concept. The haemophilia community must understand this natural evolution and be prepared to work collaboratively with governments, physicians and other patients to ensure that centres retain the expertise to meet the emergent needs when they arise.
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Affiliation(s)
- B L Evatt
- World Federation of Hemophilia, Atlanta, GA 30345, USA.
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50
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Feldman BM, Pai M, Rivard GE, Israels S, Poon MC, Demers C, Robinson S, Luke KH, Wu JKM, Gill K, Lillicrap D, Babyn P, McLimont M, Blanchette VS. Tailored prophylaxis in severe hemophilia A: interim results from the first 5 years of the Canadian Hemophilia Primary Prophylaxis Study. J Thromb Haemost 2006; 4:1228-36. [PMID: 16706965 DOI: 10.1111/j.1538-7836.2006.01953.x] [Citation(s) in RCA: 197] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Prophylactic treatment for severe hemophilia A is likely to be more effective than treatment when bleeding occurs, however, prophylaxis is costly. We studied an inception cohort of 25 boys using a tailored prophylaxis approach to see if clotting factor use could be reduced with acceptable outcomes. METHODS Ten Canadian centers enrolled subjects in this 5-year study. Children were followed every 3 months at a comprehensive care hemophilia clinic. They were initially treated with once-weekly clotting factor; the frequency was escalated in a stepwise fashion if unacceptable bleeding occurred. Bleeding frequency, target joint development, physiotherapy and radiographic outcomes, as well as resource utilization, were determined prospectively. RESULTS The median follow-up time was 4.1 years (total 96.9 person-years). The median time to escalate to twice-weekly therapy was 3.42 years (lower 95% confidence limit 2.05 years). Nine subjects developed target joints at a rate of 0.09 per person-year. There was an average of 1.2 joint bleeds per person-year. The cohort consumed on average 3656 IU kg(-1)year(-1) of factor (F) VIII. Ten subjects required central venous catheters (three while on study); no complications of these devices were seen. One subject developed a transient FVIII inhibitor. End-of-study joint examination scores--both clinically and radiographically--were normal or near-normal. CONCLUSIONS Most boys with severe hemophilia A will probably have little bleeding and good joint function with tailored prophylaxis, while infusing less FVIII than usually required for traditional prophylaxis.
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Affiliation(s)
- B M Feldman
- Division of Rheumatology, Hospital for Sick Children, Toronto, ON, Canada.
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