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Debray TPA, Collins GS, Riley RD, Snell KIE, Van Calster B, Reitsma JB, Moons KGM. Transparent reporting of multivariable prediction models developed or validated using clustered data (TRIPOD-Cluster): explanation and elaboration. BMJ 2023; 380:e071058. [PMID: 36750236 PMCID: PMC9903176 DOI: 10.1136/bmj-2022-071058] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/07/2022] [Indexed: 02/09/2023]
Affiliation(s)
- Thomas P A Debray
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Cochrane Netherlands, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Gary S Collins
- Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research Centre, University of Oxford, Oxford, UK
- National Institute for Health and Care Research Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford, UK
| | - Richard D Riley
- Centre for Prognosis Research, School of Medicine, Keele University, Keele, UK
| | - Kym I E Snell
- Centre for Prognosis Research, School of Medicine, Keele University, Keele, UK
| | - Ben Van Calster
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
- EPI-centre, KU Leuven, Leuven, Belgium
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands
| | - Johannes B Reitsma
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Cochrane Netherlands, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Karel G M Moons
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
- Cochrane Netherlands, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
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Behr CM, Koffijberg H, Degeling K, Vliegenthart R, IJzerman MJ. Can we increase efficiency of CT lung cancer screening by combining with CVD and COPD screening? Results of an early economic evaluation. Eur Radiol 2022; 32:3067-3075. [PMID: 34973103 PMCID: PMC9038824 DOI: 10.1007/s00330-021-08422-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/13/2021] [Accepted: 10/18/2021] [Indexed: 12/19/2022]
Abstract
Objectives Estimating the maximum acceptable cost (MAC) per screened individual for low-dose computed tomography (LDCT) lung cancer (LC) screening, and determining the effect of additionally screening for chronic obstructive pulmonary disease (COPD), cardiovascular disease (CVD), or both on the MAC. Methods A model-based early health technology assessment (HTA) was conducted to estimate whether a new intervention could be cost-effective by calculating the MAC at a willingness-to-pay (WTP) of €20k/quality-adjusted life-year (QALY) and €80k/QALY, for a population of current and former smokers, aged 50–75 years in The Netherlands. The MAC was estimated based on incremental QALYs gained from a stage shift assuming screened individuals are detected in earlier disease stages. Data were obtained from literature and publicly available statistics and validated with experts. Results The MAC per individual for implementing LC screening at a WTP of €20k/QALY was €113. If COPD, CVD, or both were included in screening, the MAC increased to €230, €895, or €971 respectively. Scenario analyses assessed whether screening-specific disease high-risk populations would improve cost-effectiveness, showing that high-risk CVD populations were more likely to improve economic viability compared to COPD. Conclusions The economic viability of combined screening is substantially larger than for LC screening alone, primarily due to benefits from CVD screening, and is dependent on the target screening population, which is key to optimise the screening program. The total cost of breast and cervical cancer screening is lower (€420) than the MAC of Big-3, indicating that Big-3 screening may be acceptable from a health economic perspective. Key Points • Once-off combined low-dose CT screening for lung cancer, COPD, and CVD in individuals aged 50–75 years is potentially cost-effective if screening would cost less than €971 per screened individual. • Multi-disease screening requires detailed insight into the co-occurrence of these diseases to identify the optimal target screening population. • With the same target screening population and WTP, lung cancer-only screening should cost less than €113 per screened individual to be cost-effective. Supplementary Information The online version contains supplementary material available at 10.1007/s00330-021-08422-7.
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Affiliation(s)
- Carina M Behr
- Health Technology and Services Research, Faculty of Behavioural and Management Science, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Hendrik Koffijberg
- Health Technology and Services Research, Faculty of Behavioural and Management Science, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Koen Degeling
- Cancer Health Services Research, University of Melbourne Centre for Cancer Research, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Melbourne, VIC 3010, Australia.,Cancer Health Services Research, Centre for Health Policy, Melbourne School of Population and Global Health, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Melbourne, VIC 3010, Australia
| | - Rozemarijn Vliegenthart
- Dept of Radiology, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Maarten J IJzerman
- Health Technology and Services Research, Faculty of Behavioural and Management Science, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands. .,Cancer Health Services Research, University of Melbourne Centre for Cancer Research, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Melbourne, VIC 3010, Australia. .,Cancer Health Services Research, Centre for Health Policy, Melbourne School of Population and Global Health, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Melbourne, VIC 3010, Australia.
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Shao QY, Wang ZJ, Ma XT, Lin XZ, Pan L, Zhou YJ. Stroke of antiplatelet and anticoagulant therapy in patients with coronary artery disease: a meta-analysis of randomized controlled trials. BMC Cardiovasc Disord 2021; 21:574. [PMID: 34852763 PMCID: PMC8638430 DOI: 10.1186/s12872-021-02384-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/15/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We performed a meta-analysis sought to investigate the risk of stroke with antiplatelet and anticoagulant therapies among patients with coronary artery disease (CAD). METHODS We searched PubMed, EMBASE, and Cochrane Library for randomized controlled trials from January 1995 to March 2020. Studies were retrieved if they reported data of stroke for patients with CAD and were randomized to receive intensive versus conservative antithrombotic therapies, including antiplatelet and oral anticoagulant (OAC). Analyses were pooled by random-effects modeling. A total of 42 studies with 301,547subjects were enrolled in this analysis. RESULTS Intensive antithrombotic therapy significantly reduced risk of all stroke (RR 0.86, 95% CI 0.80-0.94) and ischemic stroke (RR 0.80, 95% CI 0.71-0.91), but increased risk of hemorrhagic stroke (RR 1.36, 95% CI 1.00-1.86) and intracranial hemorrhage (RR 1.46, 95% CI 1.17-1.81). Subgroup analyses indicated that OAC yields more benefit to all stroke than antiplatelet therapy (OAC: RR 0.73, 95% CI 0.58-0.92; Antiplatelet: RR 0.90, 95% CI 0.83-0.97; Between-group heterogeneity P value = 0.030). The benefit of antiplatelet therapy on all stroke and ischemic stroke were mainly driven by the studies comparing longer versus shorter duration of dual antiplatelet therapy (All stroke: RR 0.86, 95% CI 0.78-0.95; ischemic stroke: RR 0.84, 95% CI 0.75-0.94). CONCLUSIONS Among CAD patients who have already received antiplatelet therapy, either strengthening antiplatelet or anticoagulant treatments significantly reduced all stroke, mainly due to the reduction of ischemic stroke, although it increased the risk of hemorrhagic stroke and intracranial hemorrhage. OAC yields more benefit to all stroke than antiplatelet therapy.
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Affiliation(s)
- Qiao Yu Shao
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Zhi Jian Wang
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China. .,Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Anzhen Avenue #2, Chaoyang District, Beijing, 100029, China.
| | - Xiao Teng Ma
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Xu Ze Lin
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Liu Pan
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China
| | - Yu Jie Zhou
- Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Disease, The Key Laboratory of Remodeling-Related Cardiovascular Disease, Ministry of Education, Beijing, China
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Jiang Y, Jiang S, Ni W. Burden of cardiovascular diseases associated with fine particulate matter in Beijing, China: an economic modelling study. BMJ Glob Health 2020; 5:bmjgh-2020-003160. [PMID: 33082134 PMCID: PMC7577033 DOI: 10.1136/bmjgh-2020-003160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 11/06/2022] Open
Abstract
Objective To evaluate the economic and humanistic burden associated with cardiovascular diseases that were attributable to fine particulate matter (≤ 2.5 μg/m3 in aerodynamic diameter; PM2.5) in Beijing. Methods This study used a health economic modelling approach to compare the actual annual average PM2.5 concentration with the PM2.5 concentration limit (35 µg/m3) as defined by the Chinese Ambient Air Quality Standard in terms of cardiovascular disease outcomes in Beijing adult population. The outcomes included medical costs, quality-adjusted life-years (QALYs) and net monetary loss (NML). Beijing annual average PM2.5 concentration was around 105 µg/m3 during 2013–2015. Therefore, we estimated the differences in cardiovascular outcomes of Beijing adults between exposure to the PM2.5 concentration of 105 µg/m3 and exposure to the concentration of 35 µg/m3. According to WHO estimates, the hazard ratios of coronary heart disease and stroke associated with the increase of PM2.5 concentration from 35 to 105 µg/m3 were 1.15 and 1.29, respectively. Results The total 1-year excess medical costs of cardiovascular diseases associated with PM2.5 pollution in Beijing was US$147.9 million and the total 1-year QALY loss was 92 574 in 2015, amounting to an NML of US$2281.8 million. The expected lifetime incremental costs for a male Beijing adult and a female Beijing adult were US$237 and US$163, the corresponding QALY loss was 0.14 and 0.12, and the corresponding NML was US$3514 and US$2935. Conclusions PM2.5-related cardiovascular diseases imposed high economic and QALY burden on Beijing society. Continuous and intensive investment on reducing PM2.5 concentration is warranted even when only cardiovascular benefits are considered.
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Affiliation(s)
- Yawen Jiang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Shan Jiang
- School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Weiyi Ni
- Department of Pharmaceutical and Health Economics, University of Southern California, Los Angeles, California, USA
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Abraham JM, Oldenburg N, Eder M, Luepker R. Organizational Costs and Benefits of a Health System Quality Improvement Intervention to Increase Aspirin Use for Primary Prevention of Heart Attack and Stroke. Am J Med Qual 2020; 36:297-303. [PMID: 33025796 DOI: 10.1177/1062860620962572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Performance improvement on clinical quality outcomes typically requires significant effort by personnel in health care organizations. Understanding the cost of quality improvement is important given diffusion of value-based contracting. This study investigates the organizational costs and benefits associated with planning and implementing the Ask about Aspirin intervention to increase use of low-dose aspirin in clinically recommended patient populations. Data from 4 health systems in Minnesota were used to estimate personnel effort and labor resource costs as well as corresponding benefits, measured as the change in aspirin use among eligible candidates during the study period. Overall personnel effort across the 4 systems was approximately 3900 hours with corresponding resource costs estimated to be $214,385. Aspirin use increased 4.7% overall, corresponding to roughly 1530 new users in the aspirin candidate population. Significant variation was observed by system in total hours reported, distribution of effort by activity type, and in benefits realized from the intervention.
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Cost-effectiveness analysis of aspirin for primary prevention of cardiovascular events among patients with type 2 diabetes in China. PLoS One 2019; 14:e0224580. [PMID: 31790409 PMCID: PMC6886850 DOI: 10.1371/journal.pone.0224580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 10/16/2019] [Indexed: 11/23/2022] Open
Abstract
The use of aspirin for primary prevention of cardiovascular disease (CVD) in patients with diabetes mellitus (DM) is associated with lower rates of cardiovascular events but increased risks of bleeding complications. We aimed to examine the cost-effectiveness of aspirin therapy for primary prevention of CVD in Chinese DM patients. A life-long Markov model was developed to compare aspirin therapy (100mg daily) versus no use of aspirin in DM patients with no history of CVD. Model validation was conducted by comparing the simulated event rates with data reported in a clinical trial. Direct medical costs and quality-adjusted life-years gained (QALYs) were the primary outcomes from the perspective of healthcare system in China. Sensitivity analyses were performed to examine the uncertainty of model inputs. Base-case analysis showed aspirin therapy was more costly (USD1,086 versus USD819) with higher QALYs gained (11.94 versus 11.86 QALYs) compared to no use of aspirin. The base-case results were sensitive to the odds ratio of all-cause death in aspirin therapy versus no use of aspirin. Probabilistic sensitivity analysis found that aspirin therapy gained an additional 0.066 QALYs (95% CI: -0.167 QALYs-0.286 QALYs) at higher cost by USD352 (95% CI: USD130-644)). Using 30,000 USD/QALY as willingness-to-pay threshold, aspirin therapy and no use of aspirin were the preferred option in 68.71% and 31.29% of 10,000 Monte Carlo simulations, respectively. In conclusion, aspirin therapy appears to be cost-effective compared with no use of aspirin in primary prevention of CVD in Chinese DM patients.
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Jenniskens K, Lagerweij GR, Naaktgeboren CA, Hooft L, Moons KGM, Poldervaart JM, Koffijberg H, Reitsma JB. Decision analytic modeling was useful to assess the impact of a prediction model on health outcomes before a randomized trial. J Clin Epidemiol 2019; 115:106-115. [PMID: 31330250 DOI: 10.1016/j.jclinepi.2019.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/11/2019] [Accepted: 07/16/2019] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To demonstrate how decision analytic models (DAMs) can be used to quantify impact of using a (diagnostic or prognostic) prediction model in clinical practice and provide general guidance on how to perform such assessments. STUDY DESIGN AND SETTING A DAM was developed to assess the impact of using the HEART score for predicting major adverse cardiac events (MACE). Impact on patient health outcomes and health care costs was assessed in scenarios by varying compliance with and informed deviation (ID) (using additional clinical knowledge) from HEART score management recommendations. Probabilistic sensitivity analysis was used to assess estimated impact robustness. RESULTS Impact of using the HEART score on health outcomes and health care costs was influenced by an interplay of compliance with and ID from HEART score management recommendations. Compliance of 50% (with 0% ID) resulted in increased missed MACE and costs compared with usual care. Any compliance combined with at least 50% ID reduced both costs and missed MACE. Other scenarios yielded a reduction in missed MACE at higher costs. CONCLUSION Decision analytic modeling is a useful approach to assess impact of using a prediction model in practice on health outcomes and health care costs. This approach is recommended before conducting an impact trial to improve its design and conduct.
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Affiliation(s)
- Kevin Jenniskens
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands.
| | - Ghizelda R Lagerweij
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Christiana A Naaktgeboren
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Lotty Hooft
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands; Cochrane Netherlands, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Karel G M Moons
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands; Cochrane Netherlands, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Judith M Poldervaart
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Hendrik Koffijberg
- Department of Health Technology and Services Research, Technical Medical Centre, University of Twente, Enschede, The Netherlands
| | - Johannes B Reitsma
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands; Cochrane Netherlands, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
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Jiang Y, Ni W. Economic Evaluation of the 2016 Chinese Guideline and Alternative Risk Thresholds of Initiating Statin Therapy for the Management of Atherosclerotic Cardiovascular Disease. PHARMACOECONOMICS 2019; 37:943-952. [PMID: 30875022 DOI: 10.1007/s40273-019-00791-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
OBJECTIVE The 2016 Chinese guidelines for the management of dyslipidemia recommended mixed rules that centered around a 10% 10-year risk threshold to initiate statins for the primary prevention of atherosclerotic cardiovascular disease (ASCVD). The present study aimed to evaluate the cost-effectiveness of the guideline statin-initiation strategy and alternative strategies. METHODS A decision analytic model using discrete event simulation with event probabilities based on a validated ASCVD risk prediction tool for Chinese was constructed. Risk factor inputs were from the dataset of a nationally representative survey of middle-aged and elderly Chinese. Data of statin treatment effectiveness were from a published meta-analysis. Other key input data were identified from the literature or relevant databases. The strategies we evaluated were the guideline strategy, a 15% 10-year risk threshold strategy and a 20% 10-year risk threshold strategy. After excluding any extended dominance strategies, the incremental costs per quality-adjusted life year (QALY) gained of each strategy was calculated. RESULTS The 20% 10-year risk threshold strategy was an extended dominance option. The incremental costs per QALY gained from the 15% 10-year risk threshold strategy compared with no treatment and the guideline strategy compared with the 15% 10-year risk threshold strategy were CN¥69,309 and CN¥154,944, respectively. The results were robust in most sensitivity analyses. CONCLUSIONS The guideline strategy and the 15% 10-year risk threshold strategy are optimal when using the three times and the two times the gross domestic product per capita willingness-to-pay standards, respectively.
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Affiliation(s)
- Yawen Jiang
- Department of Pharmaceutical and Health Economics, University of Southern California, USC Schaeffer Center, 635 Downey Way, Verna and Peter Dauterive Hall (VPD), Suite 210, Los Angeles, CA, 90089-3333, USA.
| | - Weiyi Ni
- Department of Pharmaceutical and Health Economics, University of Southern California, USC Schaeffer Center, 635 Downey Way, Verna and Peter Dauterive Hall (VPD), Suite 210, Los Angeles, CA, 90089-3333, USA
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Raber I, McCarthy CP, Vaduganathan M, Bhatt DL, Wood DA, Cleland JGF, Blumenthal RS, McEvoy JW. The rise and fall of aspirin in the primary prevention of cardiovascular disease. Lancet 2019; 393:2155-2167. [PMID: 31226053 DOI: 10.1016/s0140-6736(19)30541-0] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 12/21/2022]
Abstract
Aspirin is one of the most frequently used drugs worldwide and is generally considered effective for the secondary prevention of cardiovascular disease. By contrast, the role of aspirin in primary prevention of cardiovascular disease is controversial. Early trials evaluating aspirin for primary prevention, done before the turn of the millennium, suggested reductions in myocardial infarction and stroke (although not mortality), and an increased risk of bleeding. In an effort to balance the risks and benefits of aspirin, international guidelines on primary prevention of cardiovascular disease have typically recommended aspirin only when a substantial 10-year risk of cardiovascular events exists. However, in 2018, three large randomised clinical trials of aspirin for the primary prevention of cardiovascular disease showed little or no benefit and have even suggested net harm. In this narrative Review, we reappraise the role of aspirin in primary prevention of cardiovascular disease, contextualising data from historical and contemporary trials.
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Affiliation(s)
- Inbar Raber
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Cian P McCarthy
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Muthiah Vaduganathan
- Brigham and Women's Hospital Heart and Vascular Center, Harvard Medical School, Boston, MA, USA
| | - Deepak L Bhatt
- Brigham and Women's Hospital Heart and Vascular Center, Harvard Medical School, Boston, MA, USA
| | - David A Wood
- National Institute for Prevention and Cardiovascular Health, National University of Ireland, Galway, Ireland; National Heart and Lung Institute, Imperial College, London, UK
| | - John G F Cleland
- National Heart and Lung Institute, Imperial College, London, UK; Robertson Centre for Biostatistics and Clinical Trials, University of Glasgow, Glasgow, UK
| | - Roger S Blumenthal
- Ciccarone Center for the Prevention of Cardiovascular Disease, Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - John W McEvoy
- National Institute for Prevention and Cardiovascular Health, National University of Ireland, Galway, Ireland; Ciccarone Center for the Prevention of Cardiovascular Disease, Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, USA; Division of Cardiology, Department of Medicine, Saolta University Healthcare Group, University College Hospital Galway, Galway, Ireland.
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Cost-effectiveness analysis of short-duration dual antiplatelet therapy with newer drug-eluting stent platforms versus longer-duration dual antiplatelet therapy with a second-generation drug-eluting stent in elective percutaneous coronary intervention. Coron Artery Dis 2019; 30:177-182. [PMID: 30676386 DOI: 10.1097/mca.0000000000000694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The cost-effectiveness of newer drug-eluting stents (DES) such as biodegradable-polymer or polymer-free stents with shorter dual antiplatelet therapy (DAPT) duration is unknown. We evaluated the cost-effectiveness of treatment with newer DES that may allow for shorter DAPT duration. PATIENTS AND METHODS We performed a cost-effectiveness analysis of treatment with newer DES platforms followed by 1 or 3 months of DAPT compared with standard second-generation DES followed by 6 or 12 months of DAPT in patients with stable coronary disease. A Markov model simulated distinct health states over a lifetime. Probabilistic sensitivity analysis and one-way sensitivity analyses were performed. A high-risk bleeding scenario was also evaluated. RESULTS Among patients with typical bleeding risk, second-generation DES and 6 months of DAPT was less expensive and resulted in marginally higher quality-adjusted life years compared with other strategies. A newer DES platform and 3 months of DAPT was preferred when the risk of fatal bleeding was two times greater than baseline, or when bleeding increased long-term mortality by a factor of 1.5. In a probabilistic sensitivity analysis, second-generation DES and 6 months of DAPT was preferred in 58% of iterations, whereas in a high-risk bleeding patient scenario, a newer DES and 3 months of DAPT was preferred in 52% of iterations. CONCLUSION A DES that allows 3 months of DAPT without increasing stent-related events is likely to be cost-effective among patients at elevated risk of bleeding, but not in patients with average bleeding risk.
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Clopidogrel Pharmacokinetics in Malaysian Population Groups: The Impact of Inter-Ethnic Variability. Pharmaceuticals (Basel) 2018; 11:ph11030074. [PMID: 30049953 PMCID: PMC6161187 DOI: 10.3390/ph11030074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/06/2018] [Accepted: 07/08/2018] [Indexed: 12/13/2022] Open
Abstract
Malaysia is a multi-ethnic society whereby the impact of pharmacogenetic differences between ethnic groups may contribute significantly to variability in clinical therapy. One of the leading causes of mortality in Malaysia is cardiovascular disease (CVD), which accounts for up to 26% of all hospital deaths annually. Clopidogrel is used as an adjunct treatment in the secondary prevention of cardiovascular events. CYP2C19 plays an integral part in the metabolism of clopidogrel to the active metabolite clopi-H4. However, CYP2C19 genetic polymorphism, prominent in Malaysians, could influence target clopi-H4 plasma concentrations for clinical efficacy. This study addresses how inter-ethnicity variability within the Malaysian population impacts the attainment of clopi-H4 target plasma concentration under different CYP2C19 polymorphisms through pharmacokinetic (PK) modelling. We illustrated a statistically significant difference (P < 0.001) in the clopi-H4 Cmax between the extensive metabolisers (EM) and poor metabolisers (PM) phenotypes with either Malay or Malaysian Chinese population groups. Furthermore, the number of PM individuals with peak clopi-H4 concentrations below the minimum therapeutic level was partially recovered using a high-dose strategy (600 mg loading dose followed by a 150 mg maintenance dose), which resulted in an approximate 50% increase in subjects attaining the minimum clopi-H4 plasma concentration for a therapeutic effect.
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Mouat MA, Coleman JLJ, Smith NJ. GPCRs in context: sexual dimorphism in the cardiovascular system. Br J Pharmacol 2018; 175:4047-4059. [PMID: 29451687 DOI: 10.1111/bph.14160] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/31/2018] [Accepted: 02/09/2018] [Indexed: 12/31/2022] Open
Abstract
Cardiovascular disease (CVD) remains the largest cause of mortality worldwide, and there is a clear gender gap in disease occurrence, with men being predisposed to earlier onset of CVD, including atherosclerosis and hypertension, relative to women. Oestrogen may be a driving factor for female-specific cardioprotection, though androgens and sex chromosomes are also likely to contribute to sexual dimorphism in the cardiovascular system (CVS). Many GPCR-mediated processes are involved in cardiovascular homeostasis, and some exhibit clear sex divergence. Here, we focus on the G protein-coupled oestrogen receptor, endothelin receptors ETA and ETB and the eicosanoid G protein-coupled receptors (GPCRs), discussing the evidence and potential mechanisms leading to gender dimorphic responses in the vasculature. The use of animal models and pharmacological tools has been essential to understanding the role of these receptors in the CVS and will be key to further delineating their sex-specific effects. Ultimately, this may illuminate wider sex differences in cardiovascular pathology and physiology. LINKED ARTICLES This article is part of a themed section on Molecular Pharmacology of GPCRs. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.21/issuetoc.
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Affiliation(s)
- Margaret A Mouat
- Molecular Pharmacology Laboratory, Division of Molecular Cardiology and Biophysics, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St Vincent's Clinical School, University of New South Wales, NSW, Australia
| | - James L J Coleman
- Molecular Pharmacology Laboratory, Division of Molecular Cardiology and Biophysics, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St Vincent's Clinical School, University of New South Wales, NSW, Australia
| | - Nicola J Smith
- Molecular Pharmacology Laboratory, Division of Molecular Cardiology and Biophysics, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia.,St Vincent's Clinical School, University of New South Wales, NSW, Australia
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Michaud TL, You W, Wilson KE, Su D, McGuire TJ, Almeida FA, Bayer AL, Estabrooks PA. Cost effectiveness and return on investment of a scalable community weight loss intervention. Prev Med 2017; 105:295-303. [PMID: 28987334 PMCID: PMC5918290 DOI: 10.1016/j.ypmed.2017.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/16/2017] [Accepted: 10/03/2017] [Indexed: 01/22/2023]
Abstract
This study assessed the lifetime health and economic consequences of an efficacious scalable community weight loss program for overweight and obese adults. We applied a state-transition Markov model to project lifetime economic outcome (US dollar) and the degree of disease averted as a result of a weight loss intervention, compared with no intervention, from a payer perspective. Effect sizes of the intervention on weight loss, by sex, race and ethnicity, and body mass index (BMI) of participants, were derived from a 12-month community program. Relative risk of diseases across BMI levels and other parameters were informed by the literature. A return on investment (ROI) analysis was conducted to present the overall cost-benefit of the program. Simulation results showed that among 33,656 participants and at a cost of $2.88 million, the program was predicted to avert (with a corresponding estimated medical costs saved of) 78 cases of coronary heart disease ($28 million), 9 cases of strokes ($971,832), 92 cases of type 2 diabetes ($24 million), 1 case of colorectal cancer ($357,022), and 3 cases of breast cancer ($483,259) over the participant lifetime. The estimated medical costs saved per participant was $1403 ($1077 of African American men and $1532 of Hispanic men), and the ROI was $16.7 ($12.8 for African American men and $18.3 for Hispanic men) for every $1 invested. We concluded that a scalable efficacious community weight loss program provides a cost-effective approach with significant ROI, which will assist informed decisions for future adoption and dissemination.
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Affiliation(s)
- Tzeyu L Michaud
- Department of Health Promotion, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA; Center for Reducing Health Disparities, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA.
| | - Wen You
- Department of Agricultural and Applied Economics, Virginia Tech, Blacksburg, VA, USA
| | - Kathryn E Wilson
- Department of Health Promotion, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Dejun Su
- Department of Health Promotion, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA; Center for Reducing Health Disparities, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Fabio A Almeida
- Department of Health Promotion, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA; Center for Reducing Health Disparities, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Amy L Bayer
- Prevention and Chronic Care Solutions, Kaiser Permanente Colorado, Denver, CO, USA
| | - Paul A Estabrooks
- Department of Health Promotion, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
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Ladapo JA, Richards AK, DeWitt CM, Harawa NT, Shoptaw S, Cunningham WE, Mafi JN. Disparities in the Quality of Cardiovascular Care Between HIV-Infected Versus HIV-Uninfected Adults in the United States: A Cross-Sectional Study. J Am Heart Assoc 2017; 6:JAHA.117.007107. [PMID: 29138182 PMCID: PMC5721786 DOI: 10.1161/jaha.117.007107] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Cardiovascular disease is emerging as a major cause of morbidity and mortality among patients with HIV. We compared use of national guideline-recommended cardiovascular care during office visits among HIV-infected versus HIV-uninfected adults. METHODS AND RESULTS We analyzed data from a nationally representative sample of HIV-infected and HIV-uninfected patients aged 40 to 79 years in the National Ambulatory Medical Care Survey/National Hospital Ambulatory Medical Care Survey, 2006 to 2013. The outcome was provision of guideline-recommended cardiovascular care. Logistic regressions with propensity score weighting adjusted for clinical and demographic factors. We identified 1631 visits by HIV-infected patients and 226 862 visits by HIV-uninfected patients with cardiovascular risk factors, representing ≈2.2 million and 602 million visits per year in the United States, respectively. The proportion of visits by HIV-infected versus HIV-uninfected adults with aspirin/antiplatelet therapy when patients met guideline-recommended criteria for primary prevention or had cardiovascular disease was 5.1% versus 13.8% (P=0.03); the proportion of visits with statin therapy when patients had diabetes mellitus, cardiovascular disease, or dyslipidemia was 23.6% versus 35.8% (P<0.01). There were no differences in antihypertensive medication therapy (53.4% versus 58.6%), diet/exercise counseling (14.9% versus 16.9%), or smoking cessation advice/pharmacotherapy (18.8% versus 22.4%) between HIV-infected versus HIV-uninfected patients, respectively. CONCLUSIONS Physicians generally underused guideline-recommended cardiovascular care and were less likely to prescribe aspirin and statins to HIV-infected patients at increased risk-findings that may partially explain higher rates of adverse cardiovascular events among patients with HIV. US policymakers and professional societies should focus on improving the quality of cardiovascular care that HIV-infected patients receive.
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Affiliation(s)
- Joseph A Ladapo
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Adam K Richards
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Cassandra M DeWitt
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Nina T Harawa
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Steven Shoptaw
- Department of Family Medicine, University of California, Los Angeles, CA
| | - William E Cunningham
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - John N Mafi
- Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA, Los Angeles, CA.,RAND Corporation, Santa Monica, CA
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Van't Hof JR, Duval S, Walts A, Kopecky SL, Luepker RV, Hirsch AT. Contemporary Primary Prevention Aspirin Use by Cardiovascular Disease Risk: Impact of US Preventive Services Task Force Recommendations, 2007-2015: A Serial, Cross-sectional Study. J Am Heart Assoc 2017; 6:e006328. [PMID: 28974502 PMCID: PMC5721844 DOI: 10.1161/jaha.117.006328] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 08/08/2017] [Indexed: 01/13/2023]
Abstract
BACKGROUND No previous study has evaluated the impact of past US Preventive Services Task Force statements on primary prevention (PP) aspirin use in a primary care setting. The aim of this study was to evaluate temporal changes in PP aspirin use in a primary care population, stratifying patients by their 10-year global cardiovascular disease risk, in response to the 2009 statement. METHODS AND RESULTS This study estimated biannual aspirin use prevalence using electronic health record data from primary care clinics within the Fairview Health System (Minnesota) from 2007 to 2015. A total of 94 270 patient encounters had complete data to estimate a 10-year cardiovascular disease risk score using the 2013 American College of Cardiology/American Heart Association global risk estimator. Patients were stratified into low- (<10%), intermediate- (10-20%), and high- (≥20%) risk groups. Over the 9-year period, PP aspirin use averaged 43%. When stratified by low, intermediate and high risk, average PP aspirin use was 41%, 63%, and 73%, respectively. Average PP aspirin use decreased after the publication of the 2009 US Preventive Services Task Force recommendation statement: from 45% to 40% in the low-risk group; from 66% to 62% in the intermediate-risk group; and from 76% to 73% in the high-risk group, before and after the guideline. CONCLUSIONS Publication of the 2009 US Preventive Services Task Force recommendation was not associated with an increase in aspirin use. High risk PP patients utilized aspirin at high rates. Patients at intermediate risk were less intensively treated, and patients at low risk used aspirin at relatively high rates. These data may inform future aspirin guideline dissemination.
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Affiliation(s)
- Jeremy R Van't Hof
- Cardiovascular Division and Lillehei Heart Institute University of Minnesota Medical School, Minneapolis, MN
| | - Sue Duval
- Cardiovascular Division and Lillehei Heart Institute University of Minnesota Medical School, Minneapolis, MN
| | - Adrienne Walts
- Cardiovascular Division and Lillehei Heart Institute University of Minnesota Medical School, Minneapolis, MN
| | | | - Russell V Luepker
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Alan T Hirsch
- Cardiovascular Division and Lillehei Heart Institute University of Minnesota Medical School, Minneapolis, MN
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
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Sex and gender differences in chronic kidney disease: progression to end-stage renal disease and haemodialysis. Clin Sci (Lond) 2017; 130:1147-63. [PMID: 27252402 DOI: 10.1042/cs20160047] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/29/2016] [Indexed: 01/04/2023]
Abstract
Sex and gender differences are of fundamental importance in most diseases, including chronic kidney disease (CKD). Men and women with CKD differ with regard to the underlying pathophysiology of the disease and its complications, present different symptoms and signs, respond differently to therapy and tolerate/cope with the disease differently. Yet an approach using gender in the prevention and treatment of CKD, implementation of clinical practice guidelines and in research has been largely neglected. The present review highlights some sex- and gender-specific evidence in the field of CKD, starting with a critical appraisal of the lack of inclusion of women in randomized clinical trials in nephrology, and thereafter revisits sex/gender differences in kidney pathophysiology, kidney disease progression, outcomes and management of haemodialysis care. In each case we critically consider whether apparent discrepancies are likely to be explained by biological or psycho-socioeconomic factors. In some cases (a few), these findings have resulted in the discovery of disease pathways and/or therapeutic opportunities for improvement. In most cases, they have been reported as merely anecdotal findings. The aim of the present review is to expose some of the stimulating hypotheses arising from these observations as a preamble for stricter approaches using gender for the prevention and treatment of CKD and its complications.
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Amirsadri M, Sedighi MJ. Cost-effectiveness evaluation of aspirin in primary prevention of myocardial infarction amongst males with average cardiovascular risk in Iran. Res Pharm Sci 2017; 12:144-153. [PMID: 28515767 PMCID: PMC5385729 DOI: 10.4103/1735-5362.202453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Aspirin is one of the certified medicines commonly used for the secondary prevention of myocardial infarction (MI). Aspirin side effects and gastrointestinal bleeding, in particular, have arisen debates on its use for the primary prevention of MI. The present research evaluates the cost-effectiveness of the use of aspirin in the primary prevention of MI among Iranian men with average cardiovascular disease (CVD) risk, using Markov modeling technique. The incremental cost-effectiveness ratios (ICERs) estimated to be 864 USA dollars (USD) per quality-adjusted life years (QALY) gained and 782 USD per life years gained (LYG) for each patient in the base-case scenario (public tariffs and no discounting). This research proves cost-effectiveness of the use of aspirin in the primary prevention of MI in targeted population, since the assessed ICERs are quite under the recommended threshold by WHO which is one gross domestic product (GDP) per capita ($5315.1 for Iran in 2015).
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Affiliation(s)
- Mohammadreza Amirsadri
- Department of Clinical Pharmacy and Pharmacy Practice and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Mohammad Javad Sedighi
- Department of Clinical Pharmacy and Pharmacy Practice and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
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Dysregulation of lipids in Alzheimer's disease and their role as potential biomarkers. Alzheimers Dement 2017; 13:810-827. [PMID: 28242299 DOI: 10.1016/j.jalz.2017.01.008] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Revised: 11/17/2016] [Accepted: 01/03/2017] [Indexed: 12/14/2022]
Abstract
The brain is highly enriched in lipids, and an intensive study of these lipids may be informative, not only of normal brain function but also of changes with age and in disease. In recent years, the development of highly sensitive mass spectrometry platforms and other high-throughput technologies has enabled the discovery of complex changes in the entire lipidome. This lipidomics approach promises to be a particularly useful tool for identifying diagnostic biomarkers for early detection of age-related neurodegenerative disease, such as Alzheimer's disease (AD), which has till recently been limited to protein- and gene-centric approaches. This review highlights known lipid changes affecting the AD brain and presents an update on the progress of lipid biomarker research in AD. Important considerations for designing large-scale lipidomics experiments are discussed to help standardize findings across different laboratories, as well as challenges associated with moving toward clinical application.
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Dehmer SP, Maciosek MV, LaFrance AB, Flottemesch TJ. Health Benefits and Cost-Effectiveness of Asymptomatic Screening for Hypertension and High Cholesterol and Aspirin Counseling for Primary Prevention. Ann Fam Med 2017; 15:23-36. [PMID: 28376458 PMCID: PMC5217841 DOI: 10.1370/afm.2015] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 10/14/2016] [Accepted: 10/29/2016] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Our aim was to update estimates of the health and economic impact of clinical services recommended for the primary prevention of cardiovascular disease (CVD) for the comparative rankings of the National Commission on Prevention Priorities, and to explore differences in outcomes by sex and race/ethnicity. METHODS We used a single, integrated, microsimulation model to generate comparable results for 3 services recommended by the US Preventive Services Task Force: aspirin counseling for the primary prevention of CVD and colorectal cancer, screening and treatment for lipid disorders (usually high cholesterol), and screening and treatment for hypertension. Analyses compare lifetime outcomes from the societal perspective for a US-representative birth cohort of 100,000 persons with and without access to each clinical preventive service. Primary outcomes are health impact, measured by the net difference in lifetime quality-adjusted life years (QALYs), and cost-effectiveness, measured in incremental cost per QALY or cost savings per person in 2012 dollars. Results are also presented for population subgroups defined by sex and race/ethnicity. RESULTS Health impact is highest for hypertension screening and treatment (15,600 QALYs), but is closely followed by cholesterol screening and treatment (14,300 QALYs). Aspirin counseling has a lower health impact (2,200 QALYs) but is found to be cost saving ($31 saved per person). Cost-effectiveness for cholesterol and hypertension screening and treatment is $33,800 per QALY and $48,500 per QALY, respectively. Findings favor hypertension over cholesterol screening and treatment for women, and opportunities to reduce disease burden across all services are greatest for the non-Hispanic black population. CONCLUSIONS All 3 CVD preventive services continue to rank highly among other recommended preventive services for US adults, but individual priorities can be tailored in practice by taking a patient's demographic characteristics and clinical objectives into account.
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20
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Sarma A, Scott NS. Aspirin Use in Women: Current Perspectives and Future Directions. Curr Atheroscler Rep 2016; 18:74. [DOI: 10.1007/s11883-016-0630-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Luepker RV, Steffen LM, Duval S, Zantek ND, Zhou X, Hirsch AT. Population Trends in Aspirin Use for Cardiovascular Disease Prevention 1980-2009: The Minnesota Heart Survey. J Am Heart Assoc 2015; 4:e002320. [PMID: 26702085 PMCID: PMC4845283 DOI: 10.1161/jaha.115.002320] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 10/15/2015] [Indexed: 11/20/2022]
Abstract
BACKGROUND Daily low-dose aspirin is recommended for primary prevention of myocardial infarction and stroke in higher-risk patients. Population trends in aspirin use for cardiovascular disease (CVD) prevention in an urban population (Minneapolis/St. Paul, 2010 population 2.85 million) from 1980 to 2009 were evaluated. METHODS AND RESULTS Surveys of randomly selected adults aged 25 to 74 years were collected at 5-year intervals. Self-reports of regular aspirin use for CVD prevention and history of CVD were obtained. Six cross-sectional surveys included 12 281 men and 14 258 women. Age-adjusted aspirin use for primary prevention increased during this period from 1% to 21% among men and 1% to 12% among women. Aspirin use was highest in those aged 65 to 74 years. For secondary prevention, age-adjusted aspirin use increased from 19% to 74% among men and 11% to 64% among women. While data are based on self-report, a substudy using a biochemical indicator of aspirin use (serum thromboxane B2) supports the validity of self-report. CONCLUSIONS Aspirin for CVD prevention is commonly used by a large and growing portion of the general population. It is not known if this is based on professional advice or self-prescribed use. It is also likely that many who would benefit do not use aspirin and others use aspirin inappropriately.
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Affiliation(s)
- Russell V. Luepker
- Division of Epidemiology and Community HealthSchool of Public HealthUniversity of MinnesotaMinneapolisMN
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMN
| | - Lyn M. Steffen
- Division of Epidemiology and Community HealthSchool of Public HealthUniversity of MinnesotaMinneapolisMN
| | - Sue Duval
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMN
| | - Nicole D. Zantek
- Laboratory Medicine and PathologyUniversity of MinnesotaMinneapolisMN
| | - Xia Zhou
- Division of Epidemiology and Community HealthSchool of Public HealthUniversity of MinnesotaMinneapolisMN
| | - Alan T. Hirsch
- Division of Epidemiology and Community HealthSchool of Public HealthUniversity of MinnesotaMinneapolisMN
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of Minnesota Medical SchoolMinneapolisMN
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Michaud TL, Abraham J, Jalal H, Luepker RV, Duval S, Hirsch AT. Cost-Effectiveness of a Statewide Campaign to Promote Aspirin Use for Primary Prevention of Cardiovascular Disease. J Am Heart Assoc 2015; 4:e002321. [PMID: 26702086 PMCID: PMC4845274 DOI: 10.1161/jaha.115.002321] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 10/23/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND The U.S. Preventive Services Task Force in 2009 recommended increased aspirin use for primary prevention of cardiovascular disease (CVD) in men ages 45 to 79 years and women ages 55 to 79 years for whom benefit outweighs risk. This study estimated the clinical efficacy and cost-effectiveness of a statewide public and health professional awareness campaign to increase regular aspirin use among the target population in Minnesota to reduce first CVD events. METHODS AND RESULTS A state-transition Markov model was developed, adopting a payer perspective and lifetime time horizon. The main outcomes of interest were quality-adjusted life years, costs, and the number of CVD events averted among those without a prior CVD history. The model was based on real-world data about campaign effectiveness from representative state-specific aspirin use and event rates, and estimates from the scholarly literature. Implementation of a campaign was predicted to avert 9874 primary myocardial infarctions in men and 1223 primary ischemic strokes in women in the target population. Increased aspirin use was associated with as many as 7222 more major gastrointestinal bleeding episodes. The cost-effectiveness analysis indicated cost-saving results for both the male and female target populations. CONCLUSIONS Using current U.S. Preventive Services Task Force recommendations, a state public and health professional awareness campaign would likely provide clinical benefit and be economically attractive. With clinician adjudication of individual benefit and risk, mechanisms can be made available that would facilitate achievement of aspirin's beneficial impact on lowering risk of primary CVD events, with minimization of adverse outcomes.
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Affiliation(s)
- Tzeyu L. Michaud
- Center for Reducing Health DisparitiesCollege of Public HealthUniversity of Nebraska Medical CenterOmahaNE
- Department of Health Promotion, Social and Behavioral HealthCollege of Public HealthUniversity of Nebraska Medical CenterOmahaNE
| | - Jean Abraham
- Division of Health Policy and ManagementUniversity of MinnesotaMinneapolisMN
| | - Hawre Jalal
- Department of Health Policy and ManagementUniversity of PittsburghPA
| | - Russell V. Luepker
- Division of Epidemiology and Community HealthUniversity of MinnesotaMinneapolisMN
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of MinnesotaMinneapolisMN
| | - Sue Duval
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of MinnesotaMinneapolisMN
| | - Alan T. Hirsch
- Division of Epidemiology and Community HealthUniversity of MinnesotaMinneapolisMN
- Lillehei Heart Institute and Cardiovascular DivisionUniversity of MinnesotaMinneapolisMN
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Drost JT, Grutters JPC, van der Wilt GJ, van der Schouw YT, Maas AHEM. Yearly hypertension screening in women with a history of pre-eclampsia: a cost-effectiveness analysis. Neth Heart J 2015; 23:585-91. [PMID: 26449244 PMCID: PMC4651960 DOI: 10.1007/s12471-015-0760-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background Women with a history of preeclampsia are at increased risk for future hypertension and cardiovascular disease (CVD); until now it is not clear whether preventive measures are needed. Methods A decision-analytic Markov model was constructed to evaluate healthcare costs and effects of screening and treatment (100 % compliance) for hypertension post preeclampsia based on the available literature. Cardiovascular events and CVD mortality were defined as health states. Outcomes were measured in absolute costs, events, life-years and quality-adjusted life-years (QALYs). Sensitivity and threshold analyses were performed to address uncertainty. Results Over a 20-year time horizon, events occurred in 7.2 % of the population after screening, and in 8.5 % of the population without screening. QALYs increased from 16.37 (no screening strategy) to 16.40 (screening strategy), an increment of 0.03 (95 % CI 0.01;0.05) QALYs. Total expected costs were € 8016 in the screening strategy, and € 9087 in the none screening strategy (expected saving of € 1071 (95 % CI − 3146;-87) per person). Conclusion Annual hypertension screening and treatment in women with a history of preeclampsia may save costs, for at least a similar quality of life and survival due to prevented CVD compared with standard care. Electronic supplementary material The online version of this article (doi:10.1007/s12471-015-0760-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- J T Drost
- Department of Cardiology, Isala Klinieken, 8000, PO Box 10500, GM Zwolle, the Netherlands.
| | - J P C Grutters
- Department for Health Evidence, Radboud University Medical Center, Nijmegen, the Netherlands
| | - G-J van der Wilt
- Department for Health Evidence, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Y T van der Schouw
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
| | - A H E M Maas
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
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Naue VM, Camargo G, Sabioni LR, Lima RDSL, Derenne ME, Lorenzo ARD, Freire MDC, Azevedo Filho CF, Resende ES, Gottlieb I. Changes in Medical Management after Coronary CT Angiography. Arq Bras Cardiol 2015; 105:410-7. [PMID: 26559988 PMCID: PMC4633005 DOI: 10.5935/abc.20150088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 05/06/2015] [Indexed: 11/25/2022] Open
Abstract
Introduction Coronary computed tomography angiography (CCTA) allows for non-invasive coronary
artery disease (CAD) phenotyping. There are still some uncertainties regarding the
impact this knowledge has on the clinical care of patients. Objective To determine whether CAD phenotyping by CCTA influences clinical decision making
by the prescription of cardiovascular drugs and their impact on non-LDL
cholesterol (NLDLC) levels. Methods We analysed consecutive patients from 2008 to 2011 submitted to CCTA without
previous diagnosis of CAD that had two serial measures of NLDLC, one up to 3
months before CCTA and the second from 3 to 6 months after. Results A total of 97 patients were included, of which 69% were men, mean age 64 ±
12 years. CCTA revealed that 18 (18%) patients had no CAD, 38 (39%) had
non-obstructive (< 50%) lesions and 41 (42%) had at least one obstructive
≥ 50% lesion. NLDLC was similar at baseline between the grups (138 ±
52 mg/dL vs. 135 ± 42 mg/dL vs. 131 ± 44 mg/dL, respectively, p =
0.32). We found significative reduction in NLDLC among patients with obstrctive
lesions (-18%, p = 0.001). We also found a positive relationship between clinical
treatment intensification with aspirin and cholesterol reducing drugs and the
severity of CAD. Conclusion Our data suggest that CCTA results were used for cardiovascular clinical treatment
titration, with especial intensification seen in patients with obstructive
≥50% CAD.
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van Kempen BJH, Ferket BS, Steyerberg EW, Max W, Myriam Hunink MG, Fleischmann KE. Comparing the cost-effectiveness of four novel risk markers for screening asymptomatic individuals to prevent cardiovascular disease (CVD) in the US population. Int J Cardiol 2015; 203:422-31. [PMID: 26547049 DOI: 10.1016/j.ijcard.2015.10.171] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/17/2015] [Accepted: 10/19/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND High sensitivity CRP (hsCRP), coronary artery calcification on CT (CT calcium), carotid artery intima media thickness on ultrasound (cIMT) and ankle-brachial index (ABI) improve prediction of cardiovascular disease (CVD) risk, but the benefit of screening with these novel risk markers in the U.S. population is unclear. METHODS AND RESULTS A microsimulation model evaluating lifelong cost-effectiveness for individuals aged 40-85 at intermediate risk of CVD, using 2003-2004 NHANES-III (N=3736), Framingham Heart Study, U.S. Vital Statistics, meta-analyses of independent predictive effects of the four novel risk markers and treatment effects was constructed. Using both an intention-to-treat (assumes adherence <100% and incorporates disutility from taking daily medications) and an as-treated (100% adherence and no disutility) analysis, quality adjusted life years (QALYs), lifetime costs (2014 US $), and incremental cost-effectiveness ratios (ICER in $/QALY gained) of screening with hsCRP, CT coronary calcium, cIMT and ABI were established compared with current practice, full adherence to current guidelines, and ubiquitous statin therapy. In the intention-to-treat analysis in men, screening with CT calcium was cost effective ($32,900/QALY) compared with current practice. In women, screening with hsCRP was cost effective ($32,467/QALY). In the as-treated analysis, statin therapy was both more effective and less costly than all other strategies for both men and women. CONCLUSIONS When a substantial disutility from taking daily medication is assumed, screening men with CT coronary calcium is likely to be cost-effective whereas screening with hsCRP has value in women. The individual perceived disutility for taking daily medication should play a key role in the decision.
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Affiliation(s)
- Bob J H van Kempen
- Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands; Department of Radiology, Erasmus MC, Rotterdam, The Netherlands
| | - Bart S Ferket
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, USA
| | | | - Wendy Max
- Institute for Health & Aging and Department of Social and Behavioral Sciences, University of California, San Francisco, CA, USA
| | - M G Myriam Hunink
- Department of Epidemiology, Erasmus MC, Rotterdam, The Netherlands; Department of Radiology, Erasmus MC, Rotterdam, The Netherlands; Department of Health Policy and Management, Harvard School of Public Health, Boston, MA, USA.
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Greving JP, Diener HC, Csiba L, Hacke W, Kappelle LJ, Koudstaal PJ, Leys D, Mas JL, Sacco RL, Sivenius J, Algra A. Individual patient data meta-analysis of antiplatelet regimens after noncardioembolic stroke or TIA: rationale and design. Int J Stroke 2015; 10 Suppl A100:145-50. [DOI: 10.1111/ijs.12581] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 06/16/2015] [Indexed: 11/29/2022]
Abstract
Background The Cerebrovascular Antiplatelet Trialists’ Collaborative Group was formed to obtain and analyze individual patient data from the major randomized trials of common antiplatelet regimens after cerebral ischemia. Although the risk of stroke can be reduced by antiplatelet drugs, there continues to be uncertainty about the balance of risk and benefits of different antiplatelet regimens for an individual patient. Aims Our aim is to provide clinicians with a thorough evidence-based answer on these therapeutic alternatives. Methods We have identified six large randomized trials and plan to meta-analyze the data on an individual patient level. In total, these trials have enrolled 46 948 patients with cerebral ischemia. Uniquely, the Cerebrovascular Antiplatelet Trialists’ Collaborative Group has secured access to the individual data of all of these trials, with the participation of key investigators and pharmaceutical companies. Our principal objective includes deriving a reliable estimate of the efficacy of different antiplatelet regimens on key outcomes including serious vascular events, major ischemic events, major bleeding, and intracranial hemorrhage. Results We propose to redefine composite outcome events, if necessary, to achieve comparability. Further, we aim to build and validate prognostic models for the risk of major bleeding and intracranial hemorrhage and to build a decision model that may support evidence-based decision making about which antiplatelet regimen would be most effective in different risk groups of patients. Conclusions This paper outlines inclusion criteria, outcome measures, baseline characteristics, and planned statistical analysis.
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Affiliation(s)
| | - Jacoba P. Greving
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - László Csiba
- Department of Neurology, University of Debrecen Medical and Health Science Center, Debrecen, Hungary
| | - Werner Hacke
- Department of Neurology, University of Heidelberg, Heidelberg, Germany
| | - L. Jaap Kappelle
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Peter J. Koudstaal
- Department of Neurology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Didier Leys
- Department of Neurology, Roger Salengro Hospital, Lille, France
| | - Jean-Louis Mas
- Department of Neurology, Hôpital Sainte-Anne, Université Paris Descartes, Paris, France
| | - Ralph L. Sacco
- Department of Neurology, Miller School of Medicine, University of Miami, Coral Gables, FL, USA
| | - Juhani Sivenius
- Department of Neurology, University Hospital of Kuopio and University of Eastern Finland, Kuopio, Finland
| | - Ale Algra
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
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Bellanti F, van Wijk RC, Danhof M, Della Pasqua O. Integration of PKPD relationships into benefit-risk analysis. Br J Clin Pharmacol 2015; 80:979-91. [PMID: 25940398 DOI: 10.1111/bcp.12674] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 04/10/2015] [Accepted: 04/17/2015] [Indexed: 12/19/2022] Open
Abstract
AIM Despite the continuous endeavour to achieve high standards in medical care through effectiveness measures, a quantitative framework for the assessment of the benefit-risk balance of new medicines is lacking prior to regulatory approval. The aim of this short review is to summarise the approaches currently available for benefit-risk assessment. In addition, we propose the use of pharmacokinetic-pharmacodynamic (PKPD) modelling as the pharmacological basis for evidence synthesis and evaluation of novel therapeutic agents. METHODS A comprehensive literature search has been performed using MESH terms in PubMed, in which articles describing benefit-risk assessment and modelling and simulation were identified. In parallel, a critical review of multi-criteria decision analysis (MCDA) is presented as a tool for characterising a drug's safety and efficacy profile. RESULTS A definition of benefits and risks has been proposed by the European Medicines Agency (EMA), in which qualitative and quantitative elements are included. However, in spite of the value of MCDA as a quantitative method, decisions about benefit-risk balance continue to rely on subjective expert opinion. By contrast, a model-informed approach offers the opportunity for a more comprehensive evaluation of benefit-risk balance before extensive evidence is generated in clinical practice. CONCLUSIONS Benefit-risk balance should be an integral part of the risk management plan and as such considered before marketing authorisation. Modelling and simulation can be incorporated into MCDA to support the evidence synthesis as well evidence generation taking into account the underlying correlations between favourable and unfavourable effects. In addition, it represents a valuable tool for the optimization of protocol design in effectiveness trials.
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Affiliation(s)
- Francesco Bellanti
- Division of Pharmacology, Leiden Academic Centre for Drug Research, the Netherlands
| | - Rob C van Wijk
- Division of Pharmacology, Leiden Academic Centre for Drug Research, the Netherlands
| | - Meindert Danhof
- Division of Pharmacology, Leiden Academic Centre for Drug Research, the Netherlands
| | - Oscar Della Pasqua
- Division of Pharmacology, Leiden Academic Centre for Drug Research, the Netherlands.,Clinical Pharmacology & Therapeutics, University College London, London.,Clinical Pharmacology Modelling & Simulation, GlaxoSmithKline, Stockley Park, UK
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Garg P, Galper BZ, Cohen DJ, Yeh RW, Mauri L. Balancing the risks of bleeding and stent thrombosis: a decision analytic model to compare durations of dual antiplatelet therapy after drug-eluting stents. Am Heart J 2015; 169:222-233.e5. [PMID: 25641531 DOI: 10.1016/j.ahj.2014.11.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 11/05/2014] [Indexed: 01/17/2023]
Abstract
BACKGROUND After coronary stent placement, whether dual antiplatelet therapy (DAPT) duration should be extended to prevent late stent thrombosis (ST) or adverse cardiovascular events is uncertain. METHODS To define the reduction in ischemic events required to outweigh increased bleeding with longer-duration DAPT, we developed a decision-analytic Markov model comparing DAPT durations of 6, 12, and 30 months after DES. Separate models were developed for patients presenting with and without an acute coronary syndrome (ACS). We used sensitivity analyses to identify the incremental benefit of longer-duration DAPT on either ST or the composite of cardiac death, myocardial infarction, and ischemic stroke (major adverse cardiovascular and cerebrovascular events [MACCEs]) required to outweigh the increased risk of bleeding associated with longer DAPT. The outcome from each strategy was quantified in terms of quality-adjusted life years. RESULTS In the non-ACS population, in order for 30 months of DAPT to be preferred over 12 months of therapy, DAPT would have to result in a 78% reduction in the risk of ST (relative risk [RR] 0.22, 3.1 fewer events per 1000) and only a 5% reduction in MACCE (RR 0.95, 2.2 fewer events per 1000) as compared with aspirin alone. For the ACS population, DAPT would have to result in a 44% reduction in the risk of ST (RR 0.56, 3.4 fewer events per 1000) but only a 2% reduction in MACCE (RR 0.98, 2.3 fewer events per 1000) as compared with aspirin alone, for 30 months of DAPT to be preferred for 12 months. CONCLUSIONS Small absolute differences in the risk of ischemic events with longer DAPT would be sufficient to outweigh the known bleeding risks.
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Affiliation(s)
- Pallav Garg
- Division of Cardiology, London Health Sciences Center, London, Ontario, Canada
| | - Benjamin Z Galper
- Division of Cardiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - David J Cohen
- Division of Cardiology, Saint Luke's Mid-America Heart Institute, University of Missouri-Kansas City, Kansas City, MO
| | - Robert W Yeh
- Division of Cardiology, Massachusetts General Medical Hospital, Harvard Medical School, Boston, MA; Division of Cardiology, Harvard Clinical Research Institute, Boston, MA
| | - Laura Mauri
- Division of Cardiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Division of Cardiology, Harvard Clinical Research Institute, Boston, MA.
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Cuzick J, Thorat MA, Bosetti C, Brown PH, Burn J, Cook NR, Ford LG, Jacobs EJ, Jankowski JA, La Vecchia C, Law M, Meyskens F, Rothwell PM, Senn HJ, Umar A. Estimates of benefits and harms of prophylactic use of aspirin in the general population. Ann Oncol 2015; 26:47-57. [PMID: 25096604 PMCID: PMC4269341 DOI: 10.1093/annonc/mdu225] [Citation(s) in RCA: 238] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/14/2014] [Accepted: 06/09/2014] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Accumulating evidence supports an effect of aspirin in reducing overall cancer incidence and mortality in the general population. We reviewed current data and assessed the benefits and harms of prophylactic use of aspirin in the general population. METHODS The effect of aspirin for site-specific cancer incidence and mortality, cardiovascular events was collated from the most recent systematic reviews. Studies identified through systematic Medline search provided data regarding harmful effects of aspirin and baseline rates of harms like gastrointestinal bleeding and peptic ulcer. RESULTS The effects of aspirin on cancer are not apparent until at least 3 years after the start of use, and some benefits are sustained for several years after cessation in long-term users. No differences between low and standard doses of aspirin are observed, but there were no direct comparisons. Higher doses do not appear to confer additional benefit but increase toxicities. Excess bleeding is the most important harm associated with aspirin use, and its risk and fatality rate increases with age. For average-risk individuals aged 50-65 years taking aspirin for 10 years, there would be a relative reduction of between 7% (women) and 9% (men) in the number of cancer, myocardial infarction or stroke events over a 15-year period and an overall 4% relative reduction in all deaths over a 20-year period. CONCLUSIONS Prophylactic aspirin use for a minimum of 5 years at doses between 75 and 325 mg/day appears to have favourable benefit-harm profile; longer use is likely to have greater benefits. Further research is needed to determine the optimum dose and duration of use, to identify individuals at increased risk of bleeding, and to test effectiveness of Helicobacter pylori screening-eradication before starting aspirin prophylaxis.
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Affiliation(s)
- J Cuzick
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK.
| | - M A Thorat
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - C Bosetti
- Department of Epidemiology, IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Milan, Italy
| | - P H Brown
- Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - J Burn
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - N R Cook
- Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston
| | - L G Ford
- Division of Cancer Prevention, National Cancer Institute, National Institutes of Health, Bethesda
| | - E J Jacobs
- Epidemiology Research Program, American Cancer Society, Atlanta, USA
| | - J A Jankowski
- Centre for Biomedical Research-Translational and Stratified Medicine, Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth; Centre for Digestive Diseases, Blizard Institute of Cell and Molecular Science, Queen Mary University of London, London, UK
| | - C La Vecchia
- Department of Epidemiology, IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Milan, Italy; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - M Law
- Centre for Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - F Meyskens
- Chao Family Comprehensive Cancer Center, University of California, Irvine, Irvine, USA
| | - P M Rothwell
- Stroke Prevention Research Unit, Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, UK
| | - H J Senn
- Tumor and Breast Center ZeTuP, St Gallen, Switzerland
| | - A Umar
- Gastrointestinal and Other Cancers Research Group, Division of Cancer Prevention, National Cancer Institute, National Institutes of Health, Bethesda, USA
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Chen CX, Hay JW. Cost-effectiveness analysis of alternative screening and treatment strategies for heterozygous familial hypercholesterolemia in the United States. Int J Cardiol 2014; 181:417-24. [PMID: 25569270 DOI: 10.1016/j.ijcard.2014.12.070] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 12/21/2014] [Indexed: 11/18/2022]
Abstract
BACKGROUND/OBJECTIVES Familial hypercholesterolemia (FH) is a genetic disorder that leads to premature heart disease or stroke if untreated. Statins are effective for individuals with FH but less than 20% of actual cases are diagnosed in the US and many people are not adherent to treatment. Using new knowledge regarding mutations responsible for FH, some European countries have developed genetic FH screening strategies, many of which have been shown to be cost-effective. This study evaluates the cost-effectiveness of genetic screening and lipid-based screening with statin adherence measures compared to lipid-based screening alone in the US. METHODS A decision tree was used to estimate disease detection with the three screening strategies, while a Markov model was used to model disease progression until death, quality-adjusted life years (QALYs) and costs from a US societal perspective. RESULTS The results showed that Genetic Screening cost $15,594 for 18.29 QALYs per person and Lipid Screening with adherence measures cost $16,385 for 18.77 QALYs compared with $10,396 for 18.28 QALYs for Lipid Screening alone. The incremental cost-effectiveness ratio (ICER) of Genetic Screening versus Lipid Screening was $519,813/QALY and that of Lipid Screening with adherence measures versus Lipid Screening alone was $12,223/QALY. At a US willingness-to-pay threshold of $150,000/QALY Genetic Screening is not cost-effective compared with Lipid Screening. Sensitivity analyses showed that results were robust to reasonable variations in model parameters. CONCLUSIONS Although genetic screening is currently not a cost-effective option in the US, health outcomes for FH individuals could benefit from adherence measures encouraging statin use.
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Affiliation(s)
- Christina X Chen
- Department of Clinical Pharmacy and Pharmaceutical Economics and Policy, School of Pharmacy, University of Southern California, Los Angeles, CA 90089-3333, USA.
| | - Joel W Hay
- Department of Clinical Pharmacy and Pharmaceutical Economics and Policy, School of Pharmacy, University of Southern California, Los Angeles, CA 90089-3333, USA.
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Ishikawa H, Mutoh M, Suzuki S, Tokudome S, Saida Y, Abe T, Okamura S, Tajika M, Joh T, Tanaka S, Kudo SE, Matsuda T, Iimuro M, Yukawa T, Takayama T, Sato Y, Lee K, Kitamura S, Mizuno M, Sano Y, Gondo N, Sugimoto K, Kusunoki M, Goto C, Matsuura N, Sakai T, Wakabayashi K. The preventive effects of low-dose enteric-coated aspirin tablets on the development of colorectal tumours in Asian patients: a randomised trial. Gut 2014; 63:1755-9. [PMID: 24488498 DOI: 10.1136/gutjnl-2013-305827] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE To evaluate the influence of low-dose, enteric-coated aspirin tablets (100 mg/day for 2 years) on colorectal tumour recurrence in Asian patients with single/multiple colorectal tumours excised by endoscopy. DESIGN A double-blinded, randomised, placebo-controlled multicentre clinical trial was conducted. PARTICIPANTS 311 subjects with single/multiple colorectal adenomas and adenocarcinomas excised by endoscopy were enrolled in the study (152 patients in the aspirin group and 159 patients in the placebo group). Enrolment began at the hospitals (n=19) in 2007 and was completed in 2009. RESULTS The subjects treated with aspirin displayed reduced colorectal tumourigenesis and primary endpoints with an adjusted OR of 0.60 (95% CI 0.36 to 0.98) compared with the subjects in the placebo group. Subgroup analysis revealed that subjects who were non-smokers, defined as those who had smoked in the past or who had never smoked, had a marked reduction in the number of recurrent tumours in the aspirin-treated group. The adjusted OR for aspirin treatment in non-smokers was 0.37 (CI 0.21 to 0.68, p<0.05). Interestingly, the use of aspirin in smokers resulted in an increased risk, with an OR of 3.44. In addition, no severe adverse effects were observed in either group. CONCLUSIONS Low-dose, enteric-coated aspirin tablets reduced colorectal tumour recurrence in an Asian population. The results are consistent with those obtained from other randomised controlled trials in Western countries. THE CLINICAL TRIAL REGISTRY WEBSITE AND THE CLINICAL TRIAL NUMBER: http://www.umin.ac.jp (number UMIN000000697).
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Affiliation(s)
- Hideki Ishikawa
- Department of Molecular-Targeting Cancer Prevention, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Michihiro Mutoh
- Division of Cancer Prevention Research, National Cancer Center Research Institute, Tokyo, Japan
| | - Sadao Suzuki
- Department of Public Health, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan
| | - Shinkan Tokudome
- Department of Public Health, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan National Institute of Health and Nutrition, Tokyo, Japan
| | | | - Takashi Abe
- Department of Gastroenterology, Takarazuka Municipal Hospital, Hyogo, Japan
| | - Shozo Okamura
- Department of Internal Medicine, Toyohashi Municipal Hospital, Aichi, Japan
| | - Masahiro Tajika
- Department of Endoscopy, Aichi Cancer Center Hospital, Aichi, Japan
| | - Takashi Joh
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan
| | - Shinji Tanaka
- Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan
| | - Shin-Ei Kudo
- Digestive Disease Center Northern Yokohama Hospital Showa University, School of Medicine, Kanagawa, Japan
| | - Takahisa Matsuda
- Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan
| | - Masaki Iimuro
- Higashisumiyoshi Morimoto Hospital, Osaka, Japan Department of Lower Gastroenterology, Hyogo College of Medicine, Hyogo, Japan
| | | | - Tetsuji Takayama
- Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yasushi Sato
- 4th Department of Internal Medicine, Sapporo Medical University, School of Medicine, Hokkaido, Japan
| | - Kyowon Lee
- Moriguchi Keijinkai Hospital, Osaka, Japan
| | - Shinji Kitamura
- Department of Gastroenterology, Sakai City Hospital, Osaka, Japan
| | - Motowo Mizuno
- Department of Internal Medicine, Hiroshima City Hospital, Hiroshima, Japan
| | - Yasushi Sano
- Division of Digestive Endoscopy and Gastrointestinal Oncology, National Cancer Center Hospital East, Chiba, Japan
| | | | | | - Masato Kusunoki
- Department of Gastrointestinal and Pediatric Surgery Division of Reparative Medicine, Institute of Life Sciences, Mie University Graduate School of Medicine, Mie, Japan
| | - Chiho Goto
- Department of Health and Nutrition, Nagoya-Bunri University, Aichi, Japan
| | - Nariaki Matsuura
- Department of Functional Diagnostic Science, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Toshiyuki Sakai
- Department of Molecular-Targeting Cancer Prevention, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Keiji Wakabayashi
- Graduate Division of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
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Fosmire Rundgren EW, Anderson SL, Marrs JC. Evaluation of Aspirin Use in Patients With Diabetes Receiving Care in Community Health. Ann Pharmacother 2014; 49:170-7. [DOI: 10.1177/1060028014554444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: The American Diabetes Association (ADA) recommends low-dose aspirin therapy as a primary prevention strategy in patients with type 1 or type 2 diabetes mellitus (DM) at increased cardiovascular risk. However, not all patients who are indicated are taking aspirin therapy, and it is not routinely documented in the electronic health record (EHR). Objective: To determine frequencies of appropriate aspirin use and documentation in the EHR in adult patients with DM. Methods: Adult patients with DM were randomized and contacted for participation in a telephonic survey between January and October 2013. Patients who consented were administered a standardized oral telephone survey regarding aspirin use. Patient demographics, current medications, allergies, past medical history, and pertinent laboratory values were collected. Patients were then stratified by the ADA-defined indication for aspirin. The primary outcomes were rates of appropriate aspirin use and documentation of aspirin therapy in the EHR. Results: Investigators contacted 276 patients for inclusion. Of the 81 patients surveyed, 74% were indicated for aspirin therapy. Nearly all (92.3%) patients reporting aspirin use were indicated for aspirin therapy compared with only 57.1% of patients who did not report aspirin but were indicated ( P = 0.0003). Alternatively, 96.7% of patients with aspirin use documented in their EHR were indicated for aspirin therapy compared with only 60.8% of patients who did not have aspirin use documented in the EHR but had an indication ( P = 0.0002). Approximately 20% of the patients indicated for and reporting aspirin use did not have aspirin documented in their EHR. Conclusions: Aspirin use in patients with DM who are indicated for therapy is significantly underutilized and underdocumented.
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Affiliation(s)
| | - Sarah L. Anderson
- University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Joel C. Marrs
- University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
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Affiliation(s)
- Michael Pignone
- Department of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC (M.P.)
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34
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Wiley B, Fuster V. The Concept of the Polypill in the Prevention of Cardiovascular
Disease. Ann Glob Health 2014; 80:24-34. [DOI: 10.1016/j.aogh.2013.12.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Green LE, Dinh TA, Hinds DA, Walser BL, Allman R. Economic evaluation of using a genetic test to direct breast cancer chemoprevention in white women with a previous breast biopsy. APPLIED HEALTH ECONOMICS AND HEALTH POLICY 2014; 12:203-217. [PMID: 24595521 DOI: 10.1007/s40258-014-0089-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Tamoxifen therapy reduces the risk of breast cancer but increases the risk of serious adverse events including endometrial cancer and thromboembolic events. OBJECTIVES The cost effectiveness of using a commercially available breast cancer risk assessment test (BREVAGen™) to inform the decision of which women should undergo chemoprevention by tamoxifen was modeled in a simulated population of women who had undergone biopsies but had no diagnosis of cancer. METHODS A continuous time, discrete event, mathematical model was used to simulate a population of white women aged 40-69 years, who were at elevated risk for breast cancer because of a history of benign breast biopsy. Women were assessed for clinical risk of breast cancer using the Gail model and for genetic risk using a panel of seven common single nucleotide polymorphisms. We evaluated the cost effectiveness of using genetic risk together with clinical risk, instead of clinical risk alone, to determine eligibility for 5 years of tamoxifen therapy. In addition to breast cancer, the simulation included health states of endometrial cancer, pulmonary embolism, deep-vein thrombosis, stroke, and cataract. Estimates of costs in 2012 US dollars were based on Medicare reimbursement rates reported in the literature and utilities for modeled health states were calculated as an average of utilities reported in the literature. A 50-year time horizon was used to observe lifetime effects including survival benefits. RESULTS For those women at intermediate risk of developing breast cancer (1.2-1.66 % 5-year risk), the incremental cost-effectiveness ratio for the combined genetic and clinical risk assessment strategy over the clinical risk assessment-only strategy was US$47,000, US$44,000, and US$65,000 per quality-adjusted life-year gained, for women aged 40-49, 50-59, and 60-69 years, respectively (assuming a price of US$945 for genetic testing). Results were sensitive to assumptions about patient adherence, utility of life while taking tamoxifen, and cost of genetic testing. CONCLUSIONS From the US payer's perspective, the combined genetic and clinical risk assessment strategy may be a moderately cost-effective alternative to using clinical risk alone to guide chemoprevention recommendations for women at intermediate risk of developing breast cancer.
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Affiliation(s)
- Linda E Green
- Department of Mathematics, University of North Carolina at Chapel Hill, CB#3250, Chapel Hill, NC, 27599, USA,
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36
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de Groot NL, van Haalen HGM, Spiegel BMR, Laine L, Lanas A, Focks JJ, Siersema PD, van Oijen MGH. Gastroprotection in low-dose aspirin users for primary and secondary prevention of ACS: results of a cost-effectiveness analysis including compliance. Cardiovasc Drugs Ther 2014; 27:341-57. [PMID: 23417566 DOI: 10.1007/s10557-013-6448-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Low-dose aspirin (ASA) increases the risk of upper gastrointestinal (GI) complications. Proton pump inhibitors (PPIs) reduce these upper GI side effects, yet patient compliance to PPIs is low. We determined the cost-effectiveness of gastroprotective strategies in low-dose ASA users considering ASA and PPI compliance. METHODS Using a Markov model we compared four strategies: no medication, ASA monotherapy, ASA+PPI co-therapy and a fixed combination of ASA and PPI for primary and secondary prevention of ACS. The risk of acute coronary syndrome (ACS), upper GI bleeding and dyspepsia was modeled as a function of compliance and the relative risk of developing these events while using medication. Costs, quality adjusted life years and number of ACS events were evaluated, applying a variable risk of upper GI bleeding. Probabilistic sensitivity analyses were performed. RESULTS For our base case patients using ASA for primary prevention of ACS no medication was superior to ASA monotherapy. PPI co-therapy was cost-effective (incremental cost-effectiveness ratio [ICER] €10,314) compared to no medication. In secondary prevention, PPI co-therapy was cost-effective (ICER €563) while the fixed combination yielded an ICER < €20,000 only in a population with elevated risk for upper GI bleeding or moderate PPI compliance. PPI co-therapy had the highest probability to be cost-effective in all scenarios. PPI use lowered the overall number of ACS. CONCLUSIONS Considering compliance, PPI co-therapy is likely to be cost-effective in patients taking low dose ASA for primary and secondary prevention of ACS, given low PPI prices. In secondary prevention, a fixed combination seems cost-effective in patients with elevated risk for upper GI bleeding or in those with moderate PPI compliance. Both strategies reduced the number of ACS compared to ASA monotherapy.
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Affiliation(s)
- N L de Groot
- Department Gastroenterology and Hepatology, University Medical Center Utrecht, PO Box (85500 internal code F02.618), 3508 GA Utrecht, The Netherlands.
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Paek YJ, Yoon JL. Aspirin in the prevention of cardiovascular disease and cancer. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2014. [DOI: 10.5124/jkma.2014.57.4.348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Yu-Jin Paek
- Department of Family Medicine, Hallym University School of Medicine, Chuncheon, Korea
| | - Jong-Lull Yoon
- Department of Family Medicine, Hallym University School of Medicine, Chuncheon, Korea
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Pignone M, Earnshaw S, McDade C, Pletcher MJ. Effect of including cancer mortality on the cost-effectiveness of aspirin for primary prevention in men. J Gen Intern Med 2013; 28:1483-91. [PMID: 23681842 PMCID: PMC3797356 DOI: 10.1007/s11606-013-2465-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 01/01/2013] [Accepted: 04/10/2013] [Indexed: 12/21/2022]
Abstract
BACKGROUND Recent data suggest that aspirin may be effective for reducing cancer mortality. OBJECTIVE To examine whether including a cancer mortality-reducing effect influences which men would benefit from aspirin for primary prevention. DESIGN We modified our existing Markov model that examines the effects of aspirin among middle-aged men with no previous history of cardiovascular disease or diabetes. For our base case scenario of 45-year-old men, we examined costs and life-years for men taking aspirin for 10 years compared with men who were not taking aspirin over those 10 years; after 10 years, we equalized treatment and followed the cohort until death. We compared our results depending on whether or not we included a 22 % relative reduction in cancer mortality, based on a recent meta-analysis. We discounted costs and benefits at 3 % and employed a third party payer perspective. MAIN MEASURE Cost per quality-adjusted life year (QALY) gained. KEY RESULTS When no effect on cancer mortality was included, aspirin had a cost per QALY gained of $22,492 at 5 % 10-year coronary heart disease (CHD) risk; at 2.5 % risk or below, no treatment was favored. When we included a reduction in cancer mortality, aspirin became cost-effective for men at 2.5 % risk as well (cost per QALY, $43,342). Results were somewhat sensitive to utility of taking aspirin daily; risk of death after myocardial infarction; and effects of aspirin on stroke, myocardial infarction, and sudden death. However, aspirin remained cost-saving or cost-effective (< $50,000 per QALY) in probabilistic analyses (59 % with no cancer effect included; 96 % with cancer effect) for men at 5 % risk. CONCLUSIONS Including an effect of aspirin on cancer mortality influences the threshold for prescribing aspirin for primary prevention in men. If such an effect is real, many middle-aged men at low cardiovascular risk would become candidates for regular aspirin use.
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Affiliation(s)
- Michael Pignone
- Cecil Sheps Center for Health Services Research, University of North Carolina, Chapel Hill, NC, USA,
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Weintraub WS, Mandel L, Weiss SA. Antiplatelet therapy in patients undergoing percutaneous coronary intervention: economic considerations. PHARMACOECONOMICS 2013; 31:959-970. [PMID: 24022207 PMCID: PMC4816975 DOI: 10.1007/s40273-013-0088-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Percutaneous coronary intervention (PCI) is one of the most common medical procedures performed for treatment of coronary artery disease. Antiplatelet medications as adjunctive therapy for PCI are used routinely, with indications for specific agents or their combinations varying depending on the clinical scenario. While the cost-effectiveness of well-established agents has been extensively studied, newer drugs have not been evaluated as thoroughly. In addition, the clinical application of some antiplatelet drugs has recently changed, thus making older studies of cost effectiveness less applicable to the current landscape of clinical practice. This article reviews cost-effectiveness considerations of antiplatelet therapies in the treatment of coronary artery disease in patients undergoing PCI. Aspirin, P2Y12 inhibitors including clopidogrel and the newer agents prasugrel and ticagrelor, as well as glycoprotein (GP) IIb/IIIa inhibitors, are discussed. Overall, the use of dual antiplatelet therapy with aspirin and a P2Y12 inhibitor in patients undergoing PCI improves ischaemic outcomes and appears to be cost effective. The few available studies suggest that the recently approved medications prasugrel and ticagrelor are cost-effective alternatives to clopidogrel. However, no direct comparison between these two newer agents is available. The indications for GP IIb/IIIa inhibitors have changed in the current PCI era, and there is a paucity of cost-effectiveness data for their use in contemporary care.
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van Nooten F, Davies GM, Jukema JW, Liem AH, Yap E, Hu XH. Economic evaluation of ezetimibe combined with simvastatin for the treatment of primary hypercholesterolaemia. Neth Heart J 2013; 19:61-7. [PMID: 22020943 DOI: 10.1007/s12471-010-0061-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE This study aims to assess the cost-effectiveness of ezetimibe plus simvastatin (E/S) versus atorvastatin or simvastatin monotherapy as second-line treatment of primary hypercholesterolaemia from the Dutch healthcare perspective. METHODS The evaluation used a Markov model and patient data from the Dutch EASEGO study in which patients failing to reach goal low-density lipoprotein cholesterol levels on atorvastatin 10 mg or simvastatin 20 mg had their dose doubled or switched to ezetimibe 10 mg plus generic simvastatin 20 mg (E10/S20). The second scenario, based on Dutch guidelines, switched patients from simvastatin 40 mg to atorvastatin 40 mg, or ezetimibe 10 mg was added to simvastatin 40 mg (E10/S40). The key effectiveness input measure was change in total cholesterol/high-density lipoprotein ratio obtained from the EASEGO study. In conformity with published studies linking reduced lipid levels to reduced risk of cardiovascular events, the present model assumed that a lipid decrease with ezetimibe may be a signal for reduced risk of cardiovascular events. Model parameters were derived from published literature. Sensitivity analyses were performed for the key parameters. RESULTS In the EASEGO scenario, incremental cost-effectiveness ratio for E10/S20 was <euro>3497/quality-adjusted life-years (QALY) vs atorvastatin 20 mg and <euro>26,417/QALY vs simvastatin 40 mg. In the Dutch guidelines scenario, E10/S40 was dominant (more effective and cost-saving) vs atorvastatin 40 mg. Varying model inputs had limited impact on the cost-effectiveness of E/S. CONCLUSIONS The analysis showed the cost-effectiveness of E/S versus atorvastatin 20 mg or simvastatin 40 mg (EASEGO scenario) at a threshold of <euro>30,000/QALY and vs atorvastatin 40 mg was dominant (Dutch guidelines). Thus, E/S seems a valuable cost-effective second-line treatment option for patients not attaining lipid treatment goals.
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Affiliation(s)
- F van Nooten
- United BioSource Corporation, 26-28 Hammersmith Grove, London, W6 7HA, UK,
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Long-term health benefits and costs of measurement of carotid intima–media thickness in prevention of coronary heart disease. J Hypertens 2013; 31:782-90. [DOI: 10.1097/hjh.0b013e32835e8ee5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Zomer E, Owen A, Magliano DJ, Ademi Z, Reid CM, Liew D. Predicting the impact of polypill use in a metabolic syndrome population: an effectiveness and cost-effectiveness analysis. Am J Cardiovasc Drugs 2013; 13:121-8. [PMID: 23532687 DOI: 10.1007/s40256-013-0019-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Individuals with metabolic syndrome (MetS) are at increased risk of cardiovascular disease (CVD), often requiring combination drug therapy for control of risk factors and subsequent risk reduction. This study aims to compare the long-term effectiveness and cost effectiveness of the polypill (a multi-component tablet), and its components (alone or in combination), in a MetS population. METHODS AND RESULTS A Markov state transition model, using individual subject data from the Australian Diabetes, Obesity and Lifestyle study, was constructed to simulate the effects of the treatment versus no treatment on CVD events, and costs over 10 years. In 1,991 individuals classified as MetS and free of existing diabetes mellitus or CVD, treatment with the polypill (or its components) was effective at reducing cardiovascular events [statin: 171, aspirin (actetylsalicylic acid): 201, antihypertensive: 186 per 1,000 individuals]. The more drug therapies employed the greater the reduction, with the polypill reducing up to 351 cardiovascular events per 10,000 individuals. Cost-effectiveness analyses were sensitive to drug treatment costs and effectiveness of treatment. At a cost of AUD$42 per person per annum, aspirin was considered cost saving. All other treatment strategies, including the polypill, were not cost effective. CONCLUSION The polypill is likely to be effective in the reduction of cardiovascular events in a MetS population. It is, however, not cost effective. Nevertheless, in a high-risk population, among whom combination therapy is often prescribed, the polypill is likely to be more cost effective than antihypertensive therapy alone or dual therapy with a statin and antihypertensive combination.
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Stranges S, Guallar E. Cardiovascular disease prevention in women: a rapidly evolving scenario. Nutr Metab Cardiovasc Dis 2012; 22:1013-1018. [PMID: 23123148 DOI: 10.1016/j.numecd.2012.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 09/27/2012] [Accepted: 10/04/2012] [Indexed: 11/23/2022]
Abstract
The past decade has witnessed a long overdue recognition of the importance of CVD in women, accompanied by an increasing awareness of gender differences in risk factors, natural history, preventive strategies, treatment, and prognosis of CVD. Reflecting the disease burden and the specific aspects of CVD in women, the American Heart Association has developed women-specific evidence-based guidelines and consensus documents for CVD prevention. The most recent update of these guidelines, published in 2011, is a milestone in the field and shows the rapidly evolving scenario of CVD prevention in women. We discuss some novel aspects of the 2011 update. The new guidelines change the focus from evidence-based to effectiveness-based, with consideration of both benefits and harms/costs of preventive interventions. The guidelines also introduce "ideal cardiovascular health" as the lowest category of risk, which implies the need of communitywide preventive, educational and policy initiatives to promote healthy lifestyles in the general population. Furthermore, the guidelines emphasize long-term overall CVD risk rather than short-term coronary risk. We also address several barriers and open questions in the evaluation and implementation of these guidelines, including how to increase the small proportion of women with ideal cardiovascular health; how to increase implementation and compliance with the recommendations; how to provide effectiveness-based recommendations for lifetime prevention goals based on short-term trials; how to obtain the best possible evidence in women; how to identify subgroups of women with different cardiovascular risk profiles or who may require tailored preventive strategies; and how to adapt current guidelines to international settings, particularly to low- and middle-income countries.
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Affiliation(s)
- S Stranges
- Division of Health Sciences, University of Warwick Medical School, Medical School Building, Gibbet Hill Campus, Coventry CV4 7AL, United Kingdom.
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Dorenkamp M, Bonaventura K, Leber AW, Boldt J, Sohns C, Boldt LH, Haverkamp W, Frei U, Roser M. Potential lifetime cost-effectiveness of catheter-based renal sympathetic denervation in patients with resistant hypertension. Eur Heart J 2012; 34:451-61. [PMID: 23091202 DOI: 10.1093/eurheartj/ehs355] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
AIMS Recent studies have demonstrated the safety and efficacy of catheter-based renal sympathetic denervation (RDN) for the treatment of resistant hypertension. We aimed to determine the cost-effectiveness of this approach separately for men and women of different ages. METHODS AND RESULTS A Markov state-transition model accounting for costs, life-years, quality-adjusted life-years (QALYs), and incremental cost-effectiveness was developed to compare RDN with best medical therapy (BMT) in patients with resistant hypertension. The model ran from age 30 to 100 years or death, with a cycle length of 1 year. The efficacy of RDN was modelled as a reduction in the risk of hypertension-related disease events and death. Analyses were conducted from a payer's perspective. Costs and QALYs were discounted at 3% annually. Both deterministic and probabilistic sensitivity analyses were performed. When compared with BMT, RDN gained 0.98 QALYs in men and 0.88 QALYs in women 60 years of age at an additional cost of €2589 and €2044, respectively. As the incremental cost-effectiveness ratios increased with patient age, RDN consistently yielded more QALYs at lower costs in lower age groups. Considering a willingness-to-pay threshold of €35 000/QALY, there was a 95% probability that RDN would remain cost-effective up to an age of 78 and 76 years in men and women, respectively. Cost-effectiveness was influenced mostly by the magnitude of effect of RDN on systolic blood pressure, the rate of RDN non-responders, and the procedure costs of RDN. CONCLUSION Renal sympathetic denervation is a cost-effective intervention for patients with resistant hypertension. Earlier treatment produces better cost-effectiveness ratios.
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Affiliation(s)
- Marc Dorenkamp
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany.
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Divisón JA, Galgo A, Polo J, Durá R. [Primary prevention with aspirin]. Semergen 2012; 38:366-76. [PMID: 22935833 DOI: 10.1016/j.semerg.2012.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2010] [Revised: 01/17/2012] [Accepted: 01/17/2012] [Indexed: 11/20/2022]
Abstract
The benefit of acetylsalicylic acid and other antiplatelet drugs in secondary prevention is well established, however it use in primary prevention continues to be controversial. On the one hand, the benefit obtained is very near the potential damage arising from its use (mainly gastrointestinal bleeding), and on the other, the net benefit is less, given that its aim is to prevent the occurrence of vascular events in situations with a lower baseline risk. Antiplatelet treatment with aspirin in primary prevention has been evaluated in clinical trials and several meta-analyses, comparing its efficacy with a placebo, and with results noted for their heterogeneity. The mechanisms of action of different antiplatelet drugs, as well as the existing evidence with aspirin in primary prevention, the directions for its use by different Scientific Societies, and the cost/benefit of the intervention are reviewed.
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Affiliation(s)
- J A Divisón
- Centro de Salud de Casas Ibáñez, Albacete, España.
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Changes to the statin prescribing policy in Belgium: potential impact in clinical and economic terms. Am J Cardiovasc Drugs 2012; 12:225-32. [PMID: 22694315 DOI: 10.1007/bf03261831] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND AND OBJECTIVE New policies in Belgium encourage prescribing of generic HMG-CoA reductase inhibitors (statins), but may lead to non-equivalent switching of patients from more potent second generation statins, as has occurred elsewhere. We sought to assess the potential health economic impact of the new policies. DESIGN This was a cost-effectiveness analysis. METHODS A Markov model was constructed to simulate the onset of cardiovascular disease (CVD) and death among a representative cohort of 80 Belgian patients initially free of CVD and taking atorvastatin. Cardiovascular risks were estimated from calibrated Framingham equations, and utilities and costs from published data. Decision analysis assessed the potential impact of switching all 80 patients to simvastatin. Changes in lipid levels expected to arise from switching were based on a published meta-analysis. RESULTS If the 80 patients remained on atorvastatin, the model predicted that 23 (29%) would develop CVD over 20 years. If they were switched to simvastatin, the predicted number was 25 (31%), equating to a 'number needed to harm' of 52. Switching would lead to a net cost saving of €131 (2012) per subject, but also a loss of 0.03 quality-adjusted life-years (QALYs) per subject. These equated to a decremental cost-effectiveness ratio of €4777 per QALY lost. Sensitivity analyses indicated this result to be robust. CONCLUSION Recently introduced statin prescribing policies in Belgium are likely, as intended, to reduce statin costs, but also increase the burden of CVD due to non-equivalent switching. It would be cost effective to maintain patients on atorvastatin for primary prevention rather than switch them to simvastatin.
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Carey KM, Cornee MR, Donovan JL, Kanaan AO. A Polypill for All? Critical Review of the Polypill Literature for Primary Prevention of Cardiovascular Disease and Stroke. Ann Pharmacother 2012; 46:688-95. [DOI: 10.1345/aph.1q621] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Objective: To evaluate the efficacy and safety of the polypill for prevention of cardiovascular disease (CVD) and stroke and to present literature related to the polypill components (statin, aspirin, antihypertensive) for primary prevention of CVD and stroke. Data Sources: A literature search was conducted in MEDLINE (1948-January 2011) and EMBASE (1974-January 2011) using the terms polypill and Polycap. When limited to clinical trials, systematic reviews, or meta-analyses, 7 studies were identified. Bibliographies of pertinent review articles and studies were scanned for additional references. A similar search was conducted to identify literature related to the use of polypill components for primary prevention of CVD and stroke. Study Selection and Data Extraction: Studies that evaluated the hypothetical benefits of a polypill and controlled trials that assessed a formulation of the polypill related to prevention of CVD and stroke were included. Studies were assessed for efficacy, safety, drug interactions, and clinical pharmacokinetics. Data Synthesis: An initial study to predict benefit estimated that a hypothetical polypill would reduce diastolic blood pressure by 11 mm Hg and low-density lipoprotein cholesterol (LDL-C) by 70 mg/dL, thus reducing the relative risks of CVD and stroke by 68% and 80%, respectively. One clinical trial in patients at low risk for CVD and stroke found that diastolic Wood pressure was reduced by 1.6 mm Hg and LDL-C was reduced by 17.7 mg/dL, correlating with 44% and 21% reduction in the relative risks of CVD and stroke, respectively. Studies in higher risk patients reported reductions in systolic blood pressure of up to 28.8 mm Hg and in LDL-C of up to 54 mg/dL, correlating with 62% and 60% relative reduction in risks of CVD and stroke, respectively. Conclusions: Polypill study results have been more modest than originally theorized. However, results show promise in patients at higher risk for CVD and stroke.
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Affiliation(s)
- Katherine M Carey
- Massachusetts College of Pharmacy and Health Sciences, Worcester, MA
| | | | | | - Abir O Kanaan
- Massachusetts College of Pharmacy and Health Sciences
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van Kempen BJ, Spronk S, Koller MT, Elias-Smale SE, Fleischmann KE, Ikram MA, Krestin GP, Hofman A, Witteman JC, Hunink MM. Comparative Effectiveness and Cost-Effectiveness of Computed Tomography Screening for Coronary Artery Calcium in Asymptomatic Individuals. J Am Coll Cardiol 2011; 58:1690-701. [DOI: 10.1016/j.jacc.2011.05.056] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 05/11/2011] [Accepted: 05/14/2011] [Indexed: 01/07/2023]
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Perego F, Renesto E, Arquati M, Scandiani L, Cogliati C, Torzillo D, Zocchi L, Casazza G, Duca P, Chirchiglia S, Lacaita G, Panteghini M, Cortellaro M. Target organ damage in a population at intermediate cardiovascular risk, with adjunctive major risk factors: CArdiovascular PREvention Sacco Study (CAPRESS). Intern Emerg Med 2011; 6:337-47. [PMID: 21165713 DOI: 10.1007/s11739-010-0501-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Accepted: 11/24/2010] [Indexed: 02/04/2023]
Abstract
The objective of the study is to assess the prevalence of target organ damage (TOD) at carotid, cardiac, renal and peripheral vascular levels in a population at intermediate cardiovascular risk, with adjunctive major risk factors (AMRF). From March 2007 to July 2009 we examined 979 subjects at intermediate cardiovascular risk, as indicated by the Italian algorithm "Progetto Cuore"; the patients were aged 40-69 years, sensitized by one or more AMRF such as family history for cardiovascular disease (CVD), being overweight or obese, and smoking habit (more than 10 cigarettes/day). We measured common carotid intima-media thickness (cc-IMT) and plaque at any level, left ventricular mass index (LVMI), urine albumin/creatinine ratio (UACR), and ankle-brachial index (ABI). The prevalence of at least one TOD was 63% (617 subjects), cc-IMT was high in 48.2% (472), UACR abnormal in 14.1% (138), LVMI high in 12.6% (117) and ABI pathological in 9.1% (89). In those with carotid damage 423 had a plaque, amounting to 43.2% of the total population. Of note, carotid damage was present in all subjects with 3 TODs, and in 92% of subjects with 2 TODs. A multivariate logistic regression model including conventional factors and AMRF indicated that age 50-69 years, systolic blood pressure, relevant smoking and CV risk score ≥15 were independently and significantly associated with at least one TOD, and at least, with carotid damage. Among the AMRF, peripheral arterial disease was associated with relevant smoking, with an odds ratio (OR) of 3 [confidence interval (CI) 1.80-4.97, p < 0.0001]; overweight and obesity both had selective associations with cardiac damage with OR 2.75 (CI 1.2-6.3, p < 0.01) and OR 3.89 (CI 1.61-9.73, p < 0.01). A substantial proportion of people at intermediate risk, with at least one AMRF have at least one TOD, a major predictor of cardiovascular outcomes.
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Affiliation(s)
- Francesca Perego
- Department of Internal Medicine, Luigi Sacco Hospital, University of Milan, via G.B. Grassi 74, 20157, Milan, Italy
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Ademi Z, Liew D, Hollingsworth B, Steg PG, Bhatt DL, Reid CM. Is it cost-effective to increase aspirin use in outpatient settings for primary or secondary prevention? Simulation data from the REACH Registry Australian Cohort. Cardiovasc Ther 2011; 31:45-52. [PMID: 21884025 DOI: 10.1111/j.1755-5922.2011.00291.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
AIMS To describe aspirin use in primary and secondary prevention and to determine the incremental costs-effectiveness ratio (ICER) per life year gain (LYG) of aspirin use among subjects with, or at high risk of atherothrombotic disease. DESIGN AND SUBJECTS To project the cost-effectiveness of aspirin over 5 years of follow-up, a Markov state transition model was developed with yearly cycles and the following health states: "Alive" (post-CAD) and "Dead." The model compared current coverage observed among 2361 subjects using the prospective Australian subset of Reduction of Atherothrombosis for continued Health (REACH) registry, and hypothetical situation whereby all subjects assumed to be treated. Costs were calculated based on the Australian government reimbursed data for 2010. MAIN OUTCOME MEASURES ICER per LYG for increased use of aspirin. RESULTS The use of aspirin in current group varied from 67% to 70%. The base-case analysis showed that increasing aspirin use among subjects with existing CAD in outpatient settings was cost saving, while increasing use of aspirin in primary prevention equated to an ICER of AUD 7126 per LYG. CONCLUSION Among subjects with existing CAD aspirin use was shown to be a dominant choice of treatment. However, among patients without existing cardiovascular disease (primary prevention), increased uptake of aspirin was cost effective but with uncertain benefit, with two hemorrhagic bleeding events occurring for every life saved.
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Affiliation(s)
- Zanfina Ademi
- Melbourne EpiCentre, Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Australia.
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