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Rodriguez-Martinez CE, Sossa-Briceño MP, Castro-Rodriguez JA. Cost Effectiveness of Pharmacological Treatments for Asthma: A Systematic Review. PHARMACOECONOMICS 2018; 36:1165-1200. [PMID: 29869050 DOI: 10.1007/s40273-018-0668-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
OBJECTIVE The objective of this article was to summarize the findings of all the available studies on alternative pharmacological treatments for asthma and assess their methodological quality, as well as to identify the main drivers of the cost effectiveness of pharmacological treatments for the disease. METHODS A systematic review of the literature in seven electronic databases was conducted in order to identify all the available health economic evidence on alternative pharmacological treatments for asthma published up to April 2017. The reporting quality of the included studies was assessed using the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) statement. RESULTS A total of 72 studies were included in the review, classified as follows: medications for acute asthma treatment (n = 5, 6.9%); inhaled corticosteroids (ICS) administered alone or in conjunction with long-acting β-agonists (LABA) or tiotropium for chronic asthma treatment (n = 38, 52.8%); direct comparisons between different combinations of ICS, ICS/LABA, leukotriene receptor antagonists (LTRA), and sodium cromoglycate for chronic asthma treatment (n = 14, 19.4%); and omalizumab for chronic asthma treatment (n = 15, 20.8%). ICS were reported to be cost effective when compared with LTRA for the management of persistent asthma. In patients with inadequately controlled asthma taking ICS, the addition of long-acting β-agonist (LABA) preparations has been demonstrated to be cost effective, especially when combinations of ICS/LABA containing formoterol are used for both maintenance and reliever therapy. In patients with uncontrolled severe persistent allergic asthma, omalizumab therapy could be cost effective in a carefully selected subgroup of patients with the more severe forms of the disease. The quality of reporting in the studies, according to the CHEERS checklist, was very uneven. The main cost-effectiveness drivers identified were the cost or rate of asthma exacerbations, the cost or rate of the use of asthma medications, the asthma mortality risk, and the rate of utilization of health services for asthma. CONCLUSIONS The present findings are in line with the pharmacological recommendations for stepwise management of asthma given in the most recent evidence-based clinical practice guidelines for the disease. The identified reporting quality of the available health economic evidence is useful for identifying aspects where there is room for improvement in future asthma cost-effectiveness studies.
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Affiliation(s)
- Carlos E Rodriguez-Martinez
- Department of Pediatrics, School of Medicine, Universidad Nacional de Colombia, Carrera 45 No. 26-85, Bogota, Colombia.
- Department of Pediatric Pulmonology and Pediatric Critical Care Medicine, School of Medicine, Universidad El Bosque, Av. Cra 9 No. 131A-02, Bogota, Colombia.
| | - Monica P Sossa-Briceño
- Department of Internal Medicine, School of Medicine, Universidad Nacional de Colombia, Carrera 45 No. 26-85, Bogota, Colombia
| | - Jose A Castro-Rodriguez
- Division of Pediatrics, School of Medicine, Pontificia Universidad Catolica de Chile, Av Libertador Bernardo O'Higgins 340, Santiago, Región Metropolitana, Chile
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Paggiaro P, Patel S, Nicolini G, Pradelli L, Zaniolo O, Papi A. Stepping down from high dose fluticasone/salmeterol to extrafine BDP/F in asthma is cost-effective. Respir Med 2013; 107:1531-7. [PMID: 23916740 DOI: 10.1016/j.rmed.2013.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 07/05/2013] [Accepted: 07/10/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND GINA guideline recommends stepping down treatment of asthma patients where control is achieved. The aim of this analysis was to estimate the costs and health outcomes associated with step down of controlled patients on high dose fluticasone/salmeterol (FP/S 1000/100 μg daily) to either medium dose FP/S (500/100 μg) dry powder or extrafine beclometasone/formoterol (BDP/F 400/24 μg) pMDI in three European countries. METHODS A patient-level simulation Markov model was constructed to enable the simulation of three comparative arms (FP/S 1000/100, FP/S 500/100, BDP/F 400/24). Transition probabilities and healthcare resources consumption were derived from a multinational clinical trial comparing BDP/F 400/24 μg vs. FP/S 500/100 μg as step down therapy in asthma. Direct costs and health state utilities were sourced from public source and published literature. The analysis was conducted from a health system perspective, based on six months horizon. Probabilistic sensitivity analyses were conducted. RESULTS The ICER (Incremental Cost-Effectiveness Ratio) associated with high dose dry powder FP/S 1000/100 μg vs. extrafine BDP/F 400/24 μg was above 70,000 GBP and 200,000 €/QALY (Quality Adjusted Life Years). An ICER of 29,000 GBP/QALY and above 30,000 €/QALY was associated with medium dose dry powder FP/S 500/100 μg vs. BDP/F 400/24 μg. CONCLUSIONS It was found that maintaining controlled patients on high dose FP/S is not cost-effective. Extrafine BDP/F 400/24 μg daily can be considered to be a cost-effective option in the countries analyzed to maintain control of asthmatic patients stepped down from high dose FP/S 1000/100 μg daily dry powder or suspension formulations.
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Stefanovic IM, Verona E, Cicak B, Vrsalovic R. No effect of fluticasone propionate on linear growth in preschool children with asthma. Pediatr Int 2011; 53:672-676. [PMID: 21342354 DOI: 10.1111/j.1442-200x.2011.03334.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Eighty percent of asthmatic children develop asthma symptoms by the age of 5 years. Inhaled corticosteroids (ICS), depending on dosage, may cause linear growth reduction and adrenal gland suppression. There are few studies about linear growth of preschool children with asthma. The aim of the present study was to investigate whether there is any effect of fluticasone propionate (FP) on linear growth and adrenal gland function. METHODS Twenty-eight children aged 18-52 months with persistent asthma receiving ICS FP 100-200 µg daily were studied for 1 year. Patients were divided into two groups according to clinical parameters: well (group 1) and poorly controlled (group 2). Height was measured every 3 months and expressed as height standard deviation score (SDS). Cumulative dose of FP expressed in mg was calculated for every patient. Early morning levels of serum adrenocorticotropic hormone (ACTH) and cortisol were assessed at the beginning and at the end of the study. RESULTS Patients took FP for an average of 11 months in group 1 and 16 months in group 2, which was not statistically significantly different. At the end of the study height SDS difference was -0.0143 in group 1 and -0.2000 in group 2, which was not statistically significantly different (t= 0.6072, P= 0.5489). There was also no statistically significant difference for average cortisol (P= 0.4381) or ACTH (P= 0.5845) concentration at the end of the study. CONCLUSION FP 100-200 µg daily had no effect on linear growth or on the hypothalamic-pituitary-adrenal gland axis but further follow up is necessary.
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Affiliation(s)
- Iva M Stefanovic
- Department of Pediatrics, University Hospital Sestre Milosrdnice, Vinogradska, Zagreb, Croatia
| | - Eva Verona
- Department of Pediatrics, University Hospital Sestre Milosrdnice, Vinogradska, Zagreb, Croatia
| | - Biserka Cicak
- Department of Pediatrics, University Hospital Sestre Milosrdnice, Vinogradska, Zagreb, Croatia
| | - Renata Vrsalovic
- Department of Pediatrics, University Hospital Sestre Milosrdnice, Vinogradska, Zagreb, Croatia
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Wang L, Hollenbeak CS, Mauger DT, Zeiger RS, Paul IM, Sorkness CA, Lemanske RF, Martinez FD, Strunk RC, Szefler SJ, Taussig LM. Cost-effectiveness analysis of fluticasone versus montelukast in children with mild-to-moderate persistent asthma in the Pediatric Asthma Controller Trial. J Allergy Clin Immunol 2011; 127:161-6, 166.e1. [PMID: 21211651 PMCID: PMC3061816 DOI: 10.1016/j.jaci.2010.10.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2010] [Revised: 09/15/2010] [Accepted: 10/15/2010] [Indexed: 11/17/2022]
Abstract
BACKGROUND Cost-effectiveness analyses of asthma controller regimens for adults exist, but similar evaluations exclusively for children are few. OBJECTIVE We sought to compare the cost-effectiveness of 2 commonly used asthma controllers, fluticasone and montelukast, with data from the Pediatric Asthma Controller Trial. METHODS We compared the cost-effectiveness of low-dose fluticasone with that of montelukast in a randomized, controlled, multicenter clinical trial in children with mild-to-moderate persistent asthma. Analyses were also conducted on subgroups based on phenotypic factors. Effectiveness measures included (1) the number of asthma-control days, (2) the percentage of participants with an increase over baseline of FEV(1) of 12% or greater, and (3) the number of exacerbations avoided. Costs were analyzed from both a US health care payer's perspective and a societal perspective. RESULTS For all cost-effectiveness measures studied, fluticasone cost less and was more effective than montelukast. For example, fluticasone treatment cost $430 less in mean direct cost (P < .01) and resulted in 40 more asthma-control days (P < .01) during the 48-week study period. Considering sampling uncertainty, fluticasone cost less and was more effective at least 95% of the time. For the high exhaled nitric oxide (eNO) phenotypic subgroup (eNO ≥25 ppb) and more responsive PC(20) subgroup (PC(20) <2 mg/mL), fluticasone was cost-effective compared with montelukast for all cost-effectiveness measures, whereas not all the effectiveness measures were statistically different for the other 2 phenotypic subgroups. CONCLUSION For children with mild-to-moderate persistent asthma, low-dose fluticasone had lower cost and higher effectiveness compared with montelukast, especially in those with more airway inflammation, as indicated by increased levels of eNO and more responsivity to methacholine.
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Affiliation(s)
- Li Wang
- Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
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Zhang L, Axelsson I, Chung M, Lau J. Dose response of inhaled corticosteroids in children with persistent asthma: a systematic review. Pediatrics 2011; 127:129-38. [PMID: 21135001 DOI: 10.1542/peds.2010-1223] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE To assess the dose-response relationship (benefits and harms) of inhaled corticosteroids (ICSs) in children with persistent asthma. METHODS We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) that compared ≥2 doses of ICSs in children aged 3 to 18 years with persistent asthma. Medline was searched for articles published between 1950 and August 2009. Main outcomes of our analyses included morning and evening peak expiratory flow, forced expiratory volume in 1 second, asthma symptom score, β(2)-agonist use, withdrawal because of lack of efficacy, and adverse events. Meta-analyses were performed to compare moderate (300-400 μg/day) with low (≤200 μg/day beclomethasone-equivalent) doses of ICSs. RESULTS Fourteen RCTs (5768 asthmatic children) that evaluated 5 ICSs were included. The pooled standardized mean difference from 6 trials revealed a small but statistically significant increase of moderate over low doses in improving forced expiratory volume in 1 second (standardized mean difference: 0.11 [95% confidence interval: 0.01-0.21]) among children with mild-to-moderate asthma. There was no significant difference between 2 doses in terms of other efficacy outcomes. Local adverse events were uncommon, and there was no evidence of dose-response relationship at low-to-moderate doses. CONCLUSIONS Compared with low doses, moderate doses of ICSs may not provide clinically relevant therapeutic advantage in children with mild-to-moderate persistent asthma. Additional RCTs are needed to clarify the dose-response relationship of ICSs in persistent childhood asthma.
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Affiliation(s)
- Linjie Zhang
- Maternal and Child Health Unit, Faculty of Medicine, Federal University of Rio Grande, Rua Visconde de Paranagua 102, Centro, Rio Grande-RS, Brazil.
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Bahadori K, Quon BS, Doyle-Waters MM, Marra C, Fitzgerald JM. A systematic review of economic evaluations of therapy in asthma. J Asthma Allergy 2010; 3:33-42. [PMID: 21437038 PMCID: PMC3047905 DOI: 10.2147/jaa.s11038] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Indexed: 11/23/2022] Open
Abstract
Background: Asthma’s cost-effectiveness is a major consideration in the evaluation of its treatment options. Our objective was to perform a systematic review of the cost-effectiveness of asthma medications. Methods: We performed a systematic search of MEDLINE, EMBASE, CINAHL, Cochrane Database of Systematic Reviews, OHE-HEED, Database of Abstracts of Reviews of Effects, Cochrane Central Register of Controlled Trials, Health Technology Assessments Database, NHS Economic Evaluation Database, and Web of Science and reviewed references from key articles between 1990 and Jan 2008. Results: A total of 49 RCTs met the inclusion criteria. Maintenance therapy with inhaled corticosteroids was found to be very cost-effective and in uncontrolled asthmatics patients currently being treated with ICS, the combination of an ICS/LABA represents a safe, cost-effective treatment. The simplified strategy using budesonide and formoterol for maintenance and reliever therapy was also found to be as cost-effective as salmeterol/fluticasone plus salbutamol. Omalizumab was found to be cost-effective. An important caveat with regard to the published literature is the relatively high proportion of economic evaluations which are funded by the manufacturers of specific drug treatments. Conclusion: Future studies should be completed independent of industry support and ensure that the comparator arms within studies should include dosages of drugs that are equivalent.
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Reddel HK, Taylor DR, Bateman ED, Boulet LP, Boushey HA, Busse WW, Casale TB, Chanez P, Enright PL, Gibson PG, de Jongste JC, Kerstjens HAM, Lazarus SC, Levy ML, O'Byrne PM, Partridge MR, Pavord ID, Sears MR, Sterk PJ, Stoloff SW, Sullivan SD, Szefler SJ, Thomas MD, Wenzel SE. An Official American Thoracic Society/European Respiratory Society Statement: Asthma Control and Exacerbations. Am J Respir Crit Care Med 2009; 180:59-99. [DOI: 10.1164/rccm.200801-060st] [Citation(s) in RCA: 1321] [Impact Index Per Article: 88.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Hughes DA, Tilson L, Drummond M. Estimating drug costs in economic evaluations in Ireland and the UK: an analysis of practice and research recommendations. PHARMACOECONOMICS 2009; 27:635-643. [PMID: 19712007 DOI: 10.2165/10899570-000000000-00000] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Cost estimates for the drug of interest, its comparator and concomitant drugs are an important component of pharmacoeconomic evaluations. However, whilst in general considerable efforts are made by analysts to ensure valid and accurate parameter inputs, the methods for estimating drug costs are often lacking. We reviewed recent pharmacoeconomic evaluations undertaken in Ireland and the UK and documented the sources of data for drug costs and the methods of cost estimation. Methods were often inadequately described and, where adequate information was available, there was considerable variation and limitations in the methods used, thereby reducing the comparability of studies. Data from a sample of studies from other Northern European countries suggested that the findings from Ireland and the UK were not atypical. In order to improve current practice we suggest a methodological checklist for use in future studies.
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Affiliation(s)
- Dyfrig A Hughes
- Centre for Economics and Policy in Health, College of Health and Behavioural Sciences, Bangor University, Bangor, Wales.
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Berger WE, Shapiro GG. The use of inhaled corticosteroids for persistent asthma in infants and young children. Ann Allergy Asthma Immunol 2004; 92:387-399; quiz 399-402, 463. [PMID: 15104189 DOI: 10.1016/s1081-1206(10)61773-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To review pediatric trials of inhaled corticosteroid (ICS) therapy and summarize data on the pediatric use of devices to facilitate delivery of ICSs. DATA SOURCES Relevant articles regarding ICS treatment of persistent asthma in children younger than 5 years were identified from MEDLINE and reference lists of review articles. STUDY SELECTION Key articles were selected by the authors. RESULTS Clinical trials from the United States and Europe consistently demonstrated that ICS therapy is the most favorable treatment option with regard to safety and efficacy for infants and young children with persistent asthma. This contention is supported by numerous trials of budesonide inhalation suspension in children ranging from 6 months through 8 years of age and data from older children treated with fluticasone propionate. CONCLUSIONS As the only corticosteroid available in the United States as a nebulized formulation and the only ICS product extensively studied in young children and infants, budesonideinhalation suspension is an appropriate first-line therapy for treatment of persistent asthma in this population.
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Affiliation(s)
- William E Berger
- Allergy and Asthma Associates of Southern California, Mission Viejo, California 92691, USA.
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Bisgaard H, Allen D, Milanowski J, Kalev I, Willits L, Davies P. Twelve-month safety and efficacy of inhaled fluticasone propionate in children aged 1 to 3 years with recurrent wheezing. Pediatrics 2004; 113:e87-94. [PMID: 14754977 DOI: 10.1542/peds.113.2.e87] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Our aim was to compare the 12-month safety and efficacy of fluticasone propionate (FP) and sodium cromoglycate (SCG) in children aged 1 to 3 years with mild to moderate recurrent wheeze. METHODS The study was a randomized, parallel-group, open-label multicenter study of 625 children, aged 1 to 3 years, with recurrent wheeze randomized in a 3:1 ratio to treatment for 52 weeks with FP (100 microg twice daily) via metered-dose inhaler and Babyhaler spacer device or SCG (5 mg 4 times daily) via metered-dose inhaler and Nebuhaler spacer device, respectively. RESULTS There was no significant difference in mean adjusted growth rates between the 2 groups: 84.0 mm/year in the FP group versus 86.4 mm/year in the SCG group (difference FP-SCG: -2.4 mm/year; 95% confidence interval: -6.6 to 1.8). Growth comparisons were independent of age, gender, previous use of steroid, or whether measured as length and/or height. Serum and urinary cortisol concentrations showed a statistically significant suppression of 10% and 14%, respectively, but the number of patients with serum cortisol levels below the lower normal limit was reduced during the trial. Both treatments were well tolerated. The most common drug-related adverse events were cough (2% FP vs 1% SCG) and hoarseness (1% FP vs 0% SCG). One incident of cataract was observed at baseline and 1 after FP treatment; the latter had resolved after 12 months. The efficacy of FP was superior to SCG with fewer cases of symptom worsening, exacerbations, and requirements for oral steroid treatment and more symptom-free days and days without use of rescue treatment. CONCLUSIONS Twelve months of treatment with inhaled FP (100 microg twice daily) in preschool children aged 1 to 3 years with recurrent wheeze has no effect on growth and no other clinically important side effects but is more efficacious than SCG.
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Affiliation(s)
- Hans Bisgaard
- Department of Pediatrics, Copenhagen University Hospital, Copenhagen, Denmark.
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Abstract
Formal economic evaluation is playing an increasingly important role in health-care decision-making. This is shown by the requirement to present economic data to support applications for public reimbursement for new pharmaceuticals in Australia and the provinces of Canada, and by the appraisal process initiated by the National Institute for Clinical Excellence in the U.K. This growing role of economic analysis applies as much to the field of asthma as anywhere. This paper provides a detailed review of applied economic studies in asthma. The review is used to explore a range of methodological issues in the field including the choice of perspective and maximand, whether to use disease-specific or generic measures of outcome and whether decision-makers should receive disaggregated cost and consequence data or results that focus on an incremental cost-effectiveness ratio. It is concluded that, given the heterogeneity in decision-makers' objectives and constraints, economic studies should be planned and executed in such a way as to maximize flexibility in how results are presented.
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Affiliation(s)
- M J Sculpher
- Centre for Health Economics, University of York, Heslington, York, UK.
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García-Marcos L, Schuster A, Cobos Barroso N. Inhaled corticosteroids plus long-acting beta2-agonists as a combined therapy in asthma. Expert Opin Pharmacother 2003; 4:23-39. [PMID: 12517241 DOI: 10.1517/14656566.4.1.23] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Inhaled corticosteroids (ICS) are the mainstay of asthma treatment. Since 1994, when the first trial showed an equivalent effect of doubling the ICS dose or adding salmeterol, it has repeatedly been shown that the combinations of beclomethasone dipropionate and salmeterol, budesonide and formoterol, or fluticasone propionate and salmeterol have at least the same efficacy as doubling the dose of the ICS in adults, though a conclusive trial in asthmatic children is still lacking. The addition of a long-acting beta(2)-agonist (LABA) to ICS appears more efficacious than adding a short-acting beta(2)-agonist or an antileukotriene, even though available data are sparse. Concurrent (two inhalers) and combination (same inhaler) modes of administration are equivalent from the clinical point of view, as is also true regarding administration via metered dose inhaler or dry powder inhaler. Using a single inhaler might eventually have a positive effect on treatment compliance, but there are no confirmatory data yet. Despite some clues regarding a presumed agonist effect of ICS and LABAs, there are still more doubts than certainties. Even though there are still unanswered questions, the data available strongly suggest that the fixed combination of ICS and LABAs using the same inhaler is an efficacious, safe and practical approach for those asthmatic patients who are not well controlled with low doses of ICS alone.
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Affiliation(s)
- Luis García-Marcos
- Department of Pediatrics, University of Murcia and Pediatric Research Unit, Dirección Salud Area II, Cartagena, Piazza San Agustín, 330201 Cartagena, Spain.
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Carter ER. Fluticasone vs placebo in toddlers with asthma: good science or questionable ethics? Chest 2002; 122:2267-8; author reply 2268. [PMID: 12475881 DOI: 10.1378/chest.122.6.2267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Abstract
Health economics is receiving more attention as decision-makers--whether purchaser, physician, or patient--are looking for a more comprehensive understanding of the impact of adopting new healthcare strategies. In this article we review the recent advances in the health economics of asthma and allergy. In burden of illness studies, estimates of the economic burden of asthma and allergy were reported from countries and regions not previously detailing these costs. There were economic evaluations comparing medications and those that evaluated disease management programs. The recent studies of pharmaceuticals have focused on evaluating the cost-effectiveness of various controller medications for the treatment of asthma. Although mostly observational, such studies increase the evidence that these medications are relatively cost-effective. A few recent economic evaluations have been published examining disease management and education programs. These studies are generally long-term evaluations and have not shown consistent health economic impact. The field of health economics in asthma and allergy continues to evolve and aims to provide information to aid in decision making.
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Affiliation(s)
- Todd A Lee
- The Midwest Center for Health Services and Policy Research, Hines VA Hospital, Hines, Illinois 60141, USA.
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