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Wu X, Xu Y, Wei M, Li M, Lei X, Yuan H, Guo J, Zhang Q, Zhang X, Sun M, Fan T, Luo G. Oral anticoagulants status after acute ischemic stroke and prognosis in patients with atrial fibrillation. J Stroke Cerebrovasc Dis 2024; 33:107452. [PMID: 37931484 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/23/2023] [Accepted: 10/26/2023] [Indexed: 11/08/2023] Open
Abstract
OBJECTIVES To investigate the oral anticoagulants (OACs) use after acute ischemic stroke (AIS) and prognosis of patients with atrial fibrillation (AF). METHODS This was a real-world follow-up research of AIS patients with AF admitted to 5 hospitals in northwestern China. We visited these individuals every 6 months to check the type, dosage of OACs, and to record IS recurrence, bleeding, and death events and modified Rankin Scale (mRS) scores until December 2022. When one of the following occurring first was endpoint: IS recurrence, death or study end. Patients were divided into continuous anticoagulation group and non-continuous anticoagulation group based on whether they continued to take OACs from the moment they were discharged until the endpoint. We further analyzed the association between anticoagulation persistence and outcomes. RESULTS Among all 250 patients with OACs indication, 147 patients (58.8 %) received OACs at discharge. Only 37.9 % of patients (39/103) started OACs after discharge. Of the 147 patients treated with OACs, 21.8 % (32/147) discontinued anticoagulation after discharge. 239 of the 250 patients had completed the median 40-month follow-up with 91 patients in continuous anticoagulation group and 148 patients in non-continuous anticoagulation group. In the multivariate COX regression, non-continuous anticoagulation was an independent risk factor for poor prognosis (mRS>2) in AIS patients with AF (1.452[1.011, 2.086], p = 0.043). CONCLUSIONS This study revealed an upward trend in the use rate of OACs, but low OACs rates that meet guideline-based criteria and low anticoagulation persistence in AF patients after AIS in the northwestern China. Discontinuous anticoagulation was associated with an increased risk of poor prognosis in these patients.
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Affiliation(s)
- Xiaoyu Wu
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China; Atrial Fibrillation Centre and Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China
| | - Yue Xu
- Department of Neurology, Ninth hospital of Xi'an, No. 151 East Section of South Second Ring Road, Xi'an 710054, China
| | - Meng Wei
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China
| | - Mengmeng Li
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China
| | - Xiangyu Lei
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China
| | - Huijie Yuan
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China
| | - Jing Guo
- Department of Rehabilitation Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, No.55 Xingshansi West Street, Xi'an 710061, China
| | - Qiang Zhang
- Department of Neurology, Shaanxi Provincial People's Hospital, No. 256 Youyi West Road, Xi'an 710068, China
| | - Xiao Zhang
- Department of Neurology, Xijing Hospital of Air Force Military Medical University, No. 127 Changle West Road, Xi'an 710032, China
| | - Man Sun
- Department of Neurology, The Second Affiliated Hospital of Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China
| | - Tong Fan
- Department of Neurology, Xi'an Gaoxin Hospital, No. 16 Tuanjie South Road, Xi'an 710075, China
| | - Guogang Luo
- Stroke Centre and Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta West Road, Xi'an 710061, China.
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Generating Real-World Evidence on the Quality Use, Benefits and Safety of Medicines in Australia: History, Challenges and a Roadmap for the Future. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182413345. [PMID: 34948955 PMCID: PMC8707536 DOI: 10.3390/ijerph182413345] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022]
Abstract
Australia spends more than $20 billion annually on medicines, delivering significant health benefits for the population. However, inappropriate prescribing and medicine use also result in harm to individuals and populations, and waste of precious health resources. Medication data linked with other routine collections enable evidence generation in pharmacoepidemiology; the science of quantifying the use, effectiveness and safety of medicines in real-world clinical practice. This review details the history of medicines policy and data access in Australia, the strengths of existing data sources, and the infrastructure and governance enabling and impeding evidence generation in the field. Currently, substantial gaps persist with respect to cohesive, contemporary linked data sources supporting quality use of medicines, effectiveness and safety research; exemplified by Australia's limited capacity to contribute to the global effort in real-world studies of vaccine and disease-modifying treatments for COVID-19. We propose a roadmap to bolster the discipline, and population health more broadly, underpinned by a distinct capability governing and streamlining access to linked data assets for accredited researchers. Robust real-world evidence generation requires current data roadblocks to be remedied as a matter of urgency to deliver efficient and equitable health care and improve the health and well-being of all Australians.
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de Oliveira Costa J, Bruno C, Schaffer AL, Raichand S, Karanges EA, Pearson SA. The changing face of Australian data reforms: impact on pharmacoepidemiology research. Int J Popul Data Sci 2021; 6:1418. [PMID: 34007904 PMCID: PMC8107783 DOI: 10.23889/ijpds.v6i1.1418] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE A wealth of data is generated through Australia's universal health care arrangements. However, use of these data has been hampered by different federal and state legislation, privacy concerns and challenges in linking data across jurisdictions. A series of data reforms have been touted to increase population health research capacity in Australia, including pharmacoepidemiology research. Here we catalogued research leveraging Australia's Pharmaceutical Benefits Scheme (PBS) data (2014-2018) and discussed these outputs in the context of previously implemented and new data reforms. METHODS We conducted a systematic review of population-based studies using PBS dispensing claims. Independent reviewers screened abstracts of 4,996 articles and 310 full-text manuscripts. We characterised publications according to study population, analytical approach, data sources used, aims and medicines focus. RESULTS We identified 180 studies; 133 used individual-level data, 70 linked PBS dispensing claims with other health data (66 across jurisdictions). Studies using individual-level data focussed on Australians receiving government benefits (87 studies) rather than all PBS-eligible persons. 63 studies examined clinician or patient practices and 33 examined exposure-outcome relationships (27 evaluated medicines safety, 6 evaluated effectiveness). Medicines acting on the nervous and cardiovascular system account for the greatest volume of PBS medicines dispensed and were the most commonly studied (67 and 40 studies, respectively). Antineoplastic and immunomodulating agents account for approximately one third of PBS expenditure but represented only 10% of studies in this review. CONCLUSIONS The studies in this review represent more than a third of all population-based pharmacoepidemiology research published in the last three decades in Australia. Recent data reforms have contributed to this escalating output. However, studies are concentrated among specific subpopulations and medicines classes, and there remains a limited understanding of population benefits and harms derived from medicines use. The current draft Data Availability and Transparency legislation should further bolster efforts in population health research.
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Affiliation(s)
| | - Claudia Bruno
- Centre for Big Data Research in Health, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Andrea L Schaffer
- Centre for Big Data Research in Health, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Smriti Raichand
- Centre for Big Data Research in Health, Faculty of Medicine, UNSW Sydney, Sydney, Australia
| | - Emily A Karanges
- School of Pharmacy, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Sallie-Anne Pearson
- Centre for Big Data Research in Health, Faculty of Medicine, UNSW Sydney, Sydney, Australia
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Bezabhe WM, Bereznicki LR, Radford J, Wimmer BC, Curtain C, Salahudeen MS, Peterson GM. Ten-Year Trends in the Use of Oral Anticoagulants in Australian General Practice Patients With Atrial Fibrillation. Front Pharmacol 2021; 12:586370. [PMID: 33867975 PMCID: PMC8044929 DOI: 10.3389/fphar.2021.586370] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 02/18/2021] [Indexed: 12/30/2022] Open
Abstract
Objective: Appropriate use of oral anticoagulants (OACs) reduces the risk of stroke in patients with atrial fibrillation (AF). The study characterized the prescribing of OACs in people with AF in the Australian primary care setting over 10 years. Design: Retrospective population study. Setting and Participants: We performed 10 sequential cross-sectional analyses of patients with a recorded diagnosis of AF between 2009 and 2018 using national general practice data. The proportion of patients with AF who were prescribed an OAC based on their stroke risk was examined. Primary and secondary outcomes: The primary outcome was the proportion of high stroke risk patients who were prescribed an OAC over a decade. The secondary outcome was variation in OAC prescribing among general practices. Results: The sample size of patients with AF ranged from 9,874 in 2009 to 41,751 in 2018. The proportion who were prescribed an OAC increased from 39.5% (95% CI 38.6–40.5%) in 2009 to 52.0% (95% CI 51.5–52.4%) in 2018 (p for trend < 0.001). During this time, the proportion of patients with AF and high stroke risk who were prescribed an OAC rose from 41.7% (95% CI 40.7–42.8%) to 55.2% (95% CI 54.7–55.8%; p for trend < 0.001) with the direct-acting oral anticoagulants accounting for over three-quarters of usage by 2018. There was substantial variation in OAC prescribing between general practices. In 2018, the proportion of moderate to high stroke risk patients who were prescribed an OAC was 38.6% (95% CI 37.2–40.1%) in the lowest practice site quintiles and 65.6% (95% CI 64.5–66.7%) in the highest practice site quintiles. Conclusions: Over the 10 years, OAC prescribing in high stroke risk patients with AF increased by one-third. There was considerable variation in OAC prescribing between general practices.
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Affiliation(s)
| | - Luke R Bereznicki
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS, Australia
| | - Jan Radford
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS, Australia.,Launceston Clinical School, Tasmanian School of Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Barbara C Wimmer
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS, Australia
| | - Colin Curtain
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS, Australia
| | | | - Gregory M Peterson
- School of Pharmacy and Pharmacology, University of Tasmania, Hobart, TAS, Australia
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Schaffer AL, Falster MO, Brieger D, Jorm LR, Wilson A, Hay M, Leeb K, Pearson S, Nasis A. Evidence-Practice Gaps in Postdischarge Initiation With Oral Anticoagulants in Patients With Atrial Fibrillation. J Am Heart Assoc 2019; 8:e014287. [PMID: 31795822 PMCID: PMC6951075 DOI: 10.1161/jaha.119.014287] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Background Oral anticoagulant (OAC) therapy reduces the risk of stroke in people with atrial fibrillation (AF), and is considered best practice; however, there is little Australian evidence around the uptake of OACs in this population. Methods and Results We used linked hospital admissions, pharmaceutical dispensing claims, medical services, and mortality data for people in Australia's 2 most populous states (July 2010 to June 2015). Among OAC‐naïve people hospitalized with AF, we estimated initiation of OAC therapy within 30 days of discharge, and persistence with therapy in the first year. We analyzed both outcomes using multivariable Cox regression. In 71 184 people with AF (median age 78 years, 49% female), 22.7% initiated OAC therapy. Initiation was lowest in July to December 2011 (17.0%) and highest in July to December 2014 (30.1%) after subsidy of the direct OACs. In adjusted analyses, initiation was most likely in people with a CHA2DS2‐VA score ≥7 (versus 0) (hazard ratio=6.25, 95% CI 5.08–7.69), and a history of venous thromboembolism (hazard ratio=2.65, 95% CI 2.49–2.83). Of the people who initiated OAC therapy, 39.9% discontinued within 1 year; a lower risk of discontinuation was associated with a CHA2DS2‐VA score ≥7 (versus 0) (hazard ratio=0.22, 95% CI 0.14–0.35), or initiation on a direct OAC (versus warfarin) (hazard ratio=0.55, 95% CI 0.50–0.60). Conclusions We found that OAC therapy was severely underutilized in people hospitalized with AF, even among high‐risk individuals. Reasons for this underuse, whether patient, prescriber, or hospital related, should be identified and addressed to reduce stroke‐related morbidity and mortality in people with AF.
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Affiliation(s)
| | | | - David Brieger
- Cardiac Clinical Network Agency for Clinical Innovation Chatswood Australia
| | - Louisa R Jorm
- Centre for Big Data Research in Health UNSW Sydney Sydney Australia
| | | | - Melanie Hay
- Victorian Agency for Health Information Melbourne Australia
| | - Kira Leeb
- Victorian Agency for Health Information Melbourne Australia
| | - Sallie Pearson
- Centre for Big Data Research in Health UNSW Sydney Sydney Australia.,Menzies Centre for Health Policy Charles Perkins Centre The University of Sydney Australia
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