By Dr Andrea Schaffer

Conference Papers

Cohen J; Alvestad S; Suarez E; Schaffer A; Selmer R; Havard A; Bateman B; Zoega H; Kieler H; Odsbu I; Huybrechts K; Kjerpeseth L; Straub L; Leinonen M; Bjork M-H; Norgaard M; Gissler M; Ulrichsen S; Hernandez-Diaz S; Tomson T; Furu K, 2021, 'The Comparative Safety of Antiseizure Medication Polytherapy vs Valproate in Pregnancy and Risk of Major Congenital Malformations', in Pharmacoepidemiology and Drug Safety, John Wiley and Sons, Virtual, pp. 73 - 74, presented at International Conference on Pharmacoepidemiology and Therapeutic Risk Management, Virtual, 23 August 2021 - 25 August 2021

Schaffer AL; Cairns R; Brown JA; Gisev N; Buckley NA; Pearson S-A, 2020, 'Changes in sales of over-the-counter and prescription medicines after rescheduling of codeine to a prescription-only medicine in Australia', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, pp. 142 - 142, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000577640500298&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer A; Zoega H; Tran DT; Buckley N; Pearson S; Havard A, 2019, 'Trajectories of antipsychotic use before and during pregnancy and related maternal and birth characteristics', in Pharmacoepidemiology and Drug Safety, Wiley, Philadelphia, USA, pp. 216 - 216, presented at International Conference on Pharmacoepidemiology, Philadelphia, USA, 24 August 2019 - 28 August 2019, http://dx.doi.org/10.1002/pds.4864

Schaffer AL; Pearson S-A; Buckley NA, 2016, 'Does Concordance with Fixed-Dose Combination (FDC) Treatment Guidelines Improve Persistence? An Australian Population Based Cohort Study', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY-BLACKWELL, pp. 292 - 292, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000385483502132&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Ganda K; Seibel M; Schaffer A; Pearson S, 2013, 'Adherence to Oral Bisphosphonate Therapy in a Fracture Liaison Service: A Randomised Controlled Trial', in JOURNAL OF BONE AND MINERAL RESEARCH, WILEY-BLACKWELL, MD, Baltimore, presented at Annual Meeting of the American-Society-for-Bone-and-Mineral-Research, MD, Baltimore, 04 October 2013 - 07 October 2013, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000332035804007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Conference Posters

Schaffer AL; buckley N; cairns R; pearson S, 2016, 'Up-Scheduling of Alprazolam to a “Controlled Drug”: Interrupted Time Series Analysis of Its Impact on Benzodiazepine (BZD) Prescribing, Dispensing and Poisonings in Australia.', Dublin, Ireland, Vol. 25, pp. 346 - 347, presented at 32nd International Conference on Pharmacoepidemiology & Therapeutic Risk Management, Dublin, Ireland, 25 August 2016 - 28 August 2016, http://dx.doi.org/10.1002/pds.4070

Conference Presentations

Schaffer A; Nassar N; Bruno C; Buckley N; Cairns R; Litchfield M; Paget S; Zoega H; Pearson S, 2021, 'Prescribed Medicine Use in a Nationwide Sample of Australian Children: Extent of Off-Label Use', presented at International Conference on Pharmacoepidemiology and Therapeutic Risk Management, Virtual, 23 August 2021 - 25 August 2021

Schaffer A; Brett J; Buckley N; Pearson S, 2021, 'Trajectories of Pregabalin Use and Their Association with Longitudinal Changes in Opioid and Benzodiazepine Daily Dose', presented at International Conference on Pharmacoepidemiology and Therapeutic Risk Management, Virtual, 23 August 2021 - 25 August 2021

Carland J; Stocker S; Reuter S; Stacy A; Schaffer A; Stefani M; Lau C; Kirubakaran R; Yang J; Shen C; Roberts D; Marriott D; Day R; Brett J, 2020, 'Evaluation of a pilot vancomycin therapeutic drug monitoring (TDM) service using an interrupted time series analysis', presented at ASCEPT, Virtual, 29 November 2020 - 02 December 2020

Schaffer A; Cairns R; Brown J; Gisev N; Buckley N; Pearson S, 2020, 'Changes in sales of over‐the‐counter and prescription medicines after rescheduling of codeine to a prescription‐only medicine in Australia', presented at International Conference on Pharmacoepidemiology and Therapeutic Risk Management

Schaffer A; Buckley N; Pearson S, 2019, 'Unintended Consequences of a National Policy Intervention to Curb Inappropriate Alprazolam Prescribing in Australia', presented at International Conference on Pharmacoepidemiology and Drug Safety, Philadelphia, USA, 24 August 2019 - 28 August 2019, http://dx.doi.org/10.1002/pds.4864

Schaffer AL; Buckley NA; Dobbins T; Degenhardt L; Larance B; Pearson SA, 2017, 'Opioid Switching After Introduction of a Tamper-Resistant Oxycodone Formulation in Australia: A Population-Based Study', presented at International Conference on Pharmacoepidemiology, Montreal, Canada, 27 August 2017 - 30 August 2017, http://dx.doi.org/10.1002/pds.4275

Schaffer AL; Buckley NA; Dobbins TA; Degenhardt L; Larance B; Pearson S-A, 2017, 'Opioid Switching After Introduction of a Tamper-Resistant Oxycodone Formulation in Australia: A Population-Based Study', https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000437103900349&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer AL; pearson S; buckley N, 2016, 'Does Concordance with Fixed-Dose Combination (FDC) Treatment Guidelines Improve Persistence? An Australian Population Based Cohort Study.', presented at 32nd International Conference on Pharmacoepidemiology & Therapeutic Risk Management, Dublin, Ireland, 25 August 2016 - 28 August 2016, http://dx.doi.org/10.1002/pds.4070

joshi V; adelstein BA; Schaffer AL; srasuebkul P; EoCC Investigators ; dobbins T; pearson S, 2016, 'A Proxy of Cancer Progression in Dispensing Claims: Validation and Performance', presented at 29th International Conference on Pharmacoepidemiology & Therapeutic Risk Management, Montreal, Canada, 25 August 2016 - 28 August 2016, http://dx.doi.org/10.1002/pds.3512

Schaffer AL; Buckley NA; Dobbins T; Banks E; Pearson S-A, 2015, 'Time Series Analysis of the Impact of Adverse Media on Statin Dispensing and Discontinuation in Australia'

Vajdic CM; Schaffer A; Dobbins TA; Ward RL; Barrett J; Er CC; Pearson S-A, 2014, 'Health service utilisation and investigations before diagnosis of cancer of unknown primary (CUP): A population-based nested case-control study', presented at 2014 World Cancer Congress, Melbourne, 03 December 2014 - 06 December 2014, http://dx.doi.org/10.1111/ajco.12332

Vajdic CM; Schaffer A; Dobbins TA; Barrett J; Ward RL; Er CC; Pearson S-A, 2014, 'HEALTH SERVICE UTILISATION AND INVESTIGATIONS BEFORE DIAGNOSIS OF CANCER OF UNKNOWN PRIMARY (CUP): A POPULATION-BASED NESTED CASE-CONTROL STUDY', https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000344745100020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer AL; Pearson S-A; Dobbins T; Er C; Meagher NS; Barrett J; Ward RL; Vajdic CM, 2013, 'HEALTH SERVICE USE, TREATMENT PATTERNS, AND SURVIVAL FOR CANCER OF UNKNOWN PRIMARY: A DATA LINKAGE STUDY', https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000325868800129&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer AL; muscatello D; broome R; corbett S; smith W, 2011, 'Excess hospital admissions, ambulance calls and mortality during an exceptional heat wave in February 2011.', presented at Australasian Epidemiological Association Annual Scientific Meeting, Perth, Australia

Schaffer AL; levi C; moore H; rose N; gattelari M; worthington J, 2010, 'Use of linked hospital data to assess the impact of the introduction of tissue plasminogen activator (tPA) therapy on stroke outcomes in NSW.', presented at Australasian Epidemiological Association 17th Annual Scientific Meeting, Sydney, Australia

Conference Abstracts

Chitty K; Buckley N; Lim J; Ali Z; Schumann J; Cairns R; Daniels B; Preen D; Schaffer A, 2022, 'An overview of psychotropic pharmacotherapy at time of death by suicide: An Australian-wide case series study using administrative and coronial data', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 31, pp. 71 - 72, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000859084400137&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer A; Buckley NA; Schumann J; Lim J; Cairns R; Chitty K, 2022, 'Patterns of psychotropic medicine use and initiation in the year prior to death by suicide: A population-based study', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 31, pp. 366 - 366, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000859084401338&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Camacho X; Schaffer A; Buckley NA; Pratt N; Henry D; Pearson S-A, 2022, 'Trends in dispensing and utilization of tapentadol in Australia', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 31, pp. 543 - 544, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000859084402283&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Schaffer AL; Brett J; Buckley NA; Pearson SA, 2022, 'Trajectories of pregabalin use and their association with longitudinal changes in opioid and benzodiazepine use', in Pain, Wolters Kluwer, United States, Vol. 163, pp. E614 - E621, United States, http://dx.doi.org/10.1097/j.pain.0000000000002433

Daniels B; Pearson S-A; Bruno C; Buckley N; Schaffer A; Jun M; Zoega H, 2021, 'Evaluating the impact of new prescribing restrictions for publicy-subsidised proton pump inhibitors in Australia: An interrupted time series analysis', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 30, pp. 219 - 220, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000687807300446&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Welberry H; Jorm L; Schaffer A; Barbieri S; Hsu B; Harris M; Hall J; Brodaty H, 2021, 'Changing general practitioner when entering residential aged care: impact on psychotropic medicine use and polypharmacy in 2,250 Australians with dementia', in Australian Dementia Forum, presented at Australian Dementia Forum

Vajdic CM; Perez-Concha O; Rhee J; Dobbins T; Ward R; Schaffer A; Van Leeuwen MT; Laaksonen M; Craigen G; Pearson S, 2019, 'Risk factors for cancer registry-notified cancer of unknown primary site (CUP)', in Asia Pacific Journal of Clinical Oncology, Wiley, Adelaide, Vol. 15, pp. 84 - 85, presented at Clinical Oncology Society of Australia 46th Annual Scientific Meeting, Adelaide, 12 November 2019 - 14 November 2019, http://dx.doi.org/10.1111/ajco.13262

Chiu T; Pearson S; Schaffer A, 2019, 'Pregabalin use outside subsidy restrictions in Australia', in Pharmacoepidemiology and Drug Safety, Wiley, Philadelphia, USA, Vol. 28, pp. 252 - 253, presented at International Conference on Pharmacoepidemiology, Philadelphia, USA, 24 August 2019 - 28 August 2019, http://dx.doi.org/10.1002/pds.4864

Schaffer AL; Buckley NA; Pearson S, 2019, 'Unintended Consequences of a National Policy Intervention to Curb Inappropriate Alprazolam Prescribing in Australia', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 28, pp. 34 - 35, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000481785600063&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1

Falster M; Schaffer A; Jorm L; Wilson A; Brieger D; Nasis A; Emerson L; Pearson S, 2018, 'Using Australia’s National Data Linkage Demonstration Project (NDLDP) to improve cardiac care: Towards a national, whole-of-population linked data resource for evidence-informed health policy', in International Journal of Population Data Science, Swansea University, Banff, Canada, Vol. 3, presented at International Population Data Linkage Conference 2018, Banff, Canada, http://dx.doi.org/10.23889/ijpds.v3i4.640

Reutfors J; Zoega H; Cesta C; Bateman BT; Cantarutti A; Cohen J; Corrao G; Einarsdottir K; Engeland A; Furu K; Havard A; Hernandez-Diaz S; Huybrechts KF; Karlsson P; Karlstad O; Li J; Schaffer A; Yu Y; Broms G, 2018, 'Antipsychotic drug use in pregnancy: A multinational database study', in PHARMACOEPIDEMIOLOGY AND DRUG SAFETY, WILEY, Vol. 27, pp. 235 - 235

Brieger D; Falster M; Schaffer A; Jorm L; Pearson S; Emerson L; Hay M; Nasis A; Wilson A, 2018, 'P2Y12 Inhibitor Therapy is Underutilised in Patients Hospitalised for Acute Myocardial Infarction: Results From a New Population-Level Data Linkage in Australia', in Heart, Lung and Circulation, Elsevier, Brisbane, Australia, Vol. 27, pp. s333, presented at Annual Scientific Meeting of the Cardiac Society of Australia and New Zealand, Brisbane, Australia, http://dx.doi.org/10.1016/j.hlc.2018.06.647

Nasis A; Schaffer A; Falster M; Pearson S; Jorm L; Emerson L; Hay M; Brieger D; Wilson A, 2018, 'Use of Oral Anticoagulants After Hospital Discharge in Patients With Atrial Fibrillation: Insights From a New Population-Level Linkage in Australia', in Heart, Lung and Circulation, Elsevier, Vol. 27, pp. s356, presented at Annual Scientific Meeting of the Cardiac Society of Australia and New Zealand, http://dx.doi.org/10.1016/j.hlc.2018.06.701

Schaffer AL; Buckley NA; Pearson S, 2017, 'Two-Year Statin Adherence Trajectories in Initiators of Combined Amlodipine-Atorvastatin Therapy: A Population-Based Study (2005–2015)', in Abstracts of the 33rd International Conference on Pharmacoepidemiology & Therapeutic Risk Management, WILEY, Montreal, Canada, Vol. 26, pp. 519 - 520, presented at International Conference on Pharmacoepidemiology, Montreal, Canada, 27 August 2017 - 30 August 2017, http://dx.doi.org/10.1002/pds.4275

Reports

Schaffer A; Falster M; Pearson S; Jorm L; Wilson A; Nasis A; Brieger D, 2018, Delivering better cardiac outcomes: Primary, specialist and hospital care

Zoega H; Schaffer A; Litchfield M; Pearson S, 2017, Post-market Review - Pulmonary Arterial Hypertension Medicines

Preprints

Andrews CD; Parker EPK; Horne E; Walker V; Palmer T; Schaffer AL; Green ACA; Curtis HJ; Walker AJ; Bridges L; Wood C; Speed V; Bates C; Cockburn J; Parry J; Mehrkar A; MacKenna B; Bacon SCJ; Goldacre B; Hernan MA; Sterne JAC; Hulme WJ, 2024, OpenSAFELY: Effectiveness of COVID-19 vaccination in children and adolescents, http://dx.doi.org/10.1101/2024.05.20.24306810

Nab L; Schaffer A; Hulme WJ; DeVito NJ; Dillingham I; Wiedemann M; Andews C; Curtis H; Fisher L; Green A; Massey J; Walters C; Higgins R; Cunningham C; Morley J; Mehrkar A; Hart L; Davy S; Evans D; Hickman G; Inglesby P; Morton CE; Smith RM; Ward T; O'Dwyer T; Maude S; Bridges L; Butler-Cole BFC; Stables CL; Stokes P; Bates C; Cockburn J; Hester F; Parry J; Bhaskaran K; Schultze A; Rentsch CT; Mathur R; Tomlinson L; Williamson E; Smeeth L; Walker A; Bacon S; MacKenna B; Goldacre B, 2024, OpenSAFELY: a platform for analysing electronic health records designed for reproducible research, http://dx.doi.org/10.31219/osf.io/hj2sg

Andrews C; Prestige E; Parker EPK; Walker V; Palmer T; Schaffer A; Green ACA; Curtis H; Walker A; Smith R; Wood C; Bates C; Mehrkar A; MacKenna B; Bacon SCJ; Goldacre B; Hernán M; Sterne JAC; the OpenSAFELY collaborative ; Hulme W, 2024, Comparative safety and effectiveness of Pfizer BA.4-5 versus Sanofi during the spring 2023 COVID-19 booster vaccination programme in England: a matched cohort study in OpenSAFELY-TPP, http://dx.doi.org/10.1101/2024.03.15.24304277

Cunningham C; Macdonald O; Schaffer A; Brown A; Wiedemann M; Higgins R; Bates C; Parry J; Fisher L; Curtis H; Mehrkar A; Hart L; Bacon S; Hulme W; Speed V; Ward T; Croker R; Wood C; Walker A; Andrews C; Butler-Cole B; Evans D; Inglesby P; Dillingham I; Davy S; Bridges L; O’Dwyer T; Maude S; Smith R; Goldacre B; MacKenna B, 2024, The impact of the COVID-19 pandemic on Antidepressant Prescribing with a focus on people with learning disability and autism: An interrupted time-series analysis in England using OpenSAFELY-TPP, http://dx.doi.org/10.1101/2024.05.08.24306990

Zoega H; Falster M; Gillies M; Litchfield M; Camacho X; Bruno C; Daniels B; Donnolley N; Havard A; Schaffer A; Chambers G; Degenhardt L; Dobbins T; Gisev N; Ivers R; Jorm L; Liu B; Vajdic C; Pearson S-A, 2024, The Medicines Intelligence Data Platform: A population-based data resource from New South Wales, Australia, http://dx.doi.org/10.1101/2024.04.29.24306520

Schaffer A; Hulme W; Horne E; Parker E; Walker V; Stables C; Mehrkar A; Bacon SCJ; Bates C; Goldacre B; Walker A; The OpenSAFELY Collaborative ; Hernán M; Sterne J, 2023, Effect of the 2022 COVID-19 booster vaccination campaign in 50 year olds in England: regression discontinuity analysis in OpenSAFELY, http://dx.doi.org/10.1101/2023.09.07.23295194

The OpenSAFELY collaborative ; Tazare J; Nab L; Zheng B; Hulme W; Green A; Curtis H; Mahalingasivam V; Higgins R; Schultze A; Bhaskaran K; Mehrkar A; Schaffer A; Smith R; Bates C; Cockburn J; Parry J; Hester F; Harper S; Eggo R; Walker A; Marks M; Brown M; Maringe C; Leyrat C; Evans S; Goldacre B; MacKenna B; Sterne J; Tomlinson L; Douglas I, 2023, Effectiveness of Sotrovimab and Molnupiravir in community settings in England across the Omicron BA.1 and BA.2 sublineages: emulated target trials using the OpenSAFELY platform, http://dx.doi.org/10.1101/2023.05.12.23289914

Schaffer A; Park R; Tazare J; Bhaskaran K; MacKenna B; Denaxas S; Denaxas S; Dillingham I; Bacon SCJ; Mehrkar A; Bates C; Goldacre B; Greaves F; Macleod J; The OpenSAFELY Collaborative ; National Core Studies Collaborative ; Tomlinson L; Walker A, 2023, Fit notes associated with COVID-19 in 24 million patients’ primary care records: A cohort study in OpenSAFELY-TPP, http://dx.doi.org/10.1101/2023.07.28.23293269

The OpenSAFELY Collaborative ; Brown A; Fisher L; Curtis H; Wiedemann M; Hulme W; Hopcroft LEM; Cunningham C; Speed V; Costello R; Galloway J; Russell M; Bechman K; Kurt Z; Croker R; Wood C; Walker A; Schaffer A; Bacon SCJ; Mehrkar A; Hickman G; Bates C; Cockburn J; Parry J; Hester F; Harper S; Goldacre B; MacKenna B, 2023, OpenSAFELY: The impact of COVID-19 on azathioprine, leflunomide, and methotrexate monitoring, and factors associated with change in monitoring rate, http://dx.doi.org/10.1101/2023.06.06.23290826

The OpenSAFELY Collaborative ; Wood C; Speed V; Fisher L; Curtis H; Schaffer A; Walker A; Croker R; Brown A; Cunningham C; Hulme W; Andrews C; Butler-Cole B; Evans D; Inglesby P; Dillingham I; Bacon SCJ; Davy S; Ward T; Hickman G; Bridges L; O’Dwyer T; Maude S; Smith R; Mehrkar A; Bates C; Cockburn J; Parry J; Hester F; Harper S; Goldacre B; MacKenna B, 2023, The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records, http://dx.doi.org/10.1101/2023.07.31.23293419

de Oliveira Costa J; Gillies M; Schaffer A; Peiris D; Zoega H; Pearson S-A, 2021, Changes in antidepressant use in Australia: A nationwide analysis prior to and during the COVID-19 pandemic (2015-2021), http://dx.doi.org/10.1101/2021.11.24.21266837

Schaffer A; Henry D; Zoega H; Elliott J; Pearson S-A, 2021, Changes in dispensing of medicines proposed for re-purposing in the first year of the COVID-19 pandemic in Australia, http://dx.doi.org/10.1101/2021.09.26.21264150

Schaffer AL; Andrews CD; Brown AD; Croker R; Hulme WJ; Nab L; Quinlan J; Speed V; Wood C; Wiedemann M; Massey J; Inglesby P; Bacon SC; Mehrkar A; Bates C; Goldacre B; Collaborative TO; Walker AJ; MacKenna B, Changes in opioid prescribing during the COVID-19 pandemic in England: cohort study of 20 million patients in OpenSAFELY-TPP, http://dx.doi.org/10.1101/2024.02.23.24303238

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