Alex J Walker (A J Walker, Alex Walker)

ResearcherID Scopus Author ID ORCID

Publication Activity (10 Years)

Years Active: 2018-2024
Publications (10 Years): 63

Top Venues

BMJ open

Nature communications

Annals of internal medicine

British journal of clinical pharmacology

University of Nottingham

University of Nottingham (PHD)

This page only lists publications with an associated author ORCID identifier.

Affiliation History

University of Nottingham Jun 01 2015 - Dec 31 2016

United Kingdom

Senior Research Fellow :: School of Life Sciences

East Midlands Academic Health Science Network/University of Nottingham Oct 14 2014 - May 31 2015

United Kingdom

Research Fellow

University of Nottingham

United Kingdom

Research Fellow :: Epidemiology and Public Health

Education History

University of Nottingham

United Kingdom

PHD :: Epidemiology and Public Health

University of Nottingham

United Kingdom

MSC :: Molecular Medical Sciences

University of Nottingham

United Kingdom

BSC :: Biomedical Sciences

Publications

Lisa E M Hopcroft, Helen J Curtis, Richard Croker, Felix Pretis, Peter Inglesby, David Evans, Sebastian C J Bacon, Alex J Walker, Alex J Walker, Brian Mackenna
Data-Driven Identification of Potentially Successful Intervention Implementations Using 5 Years of Opioid Prescribing Data: Retrospective Database Study. JMIR public health and surveillance 10 (2024)
Elsie M F Horne, William J Hulme, Edward P K Parker, Ruth H Keogh, Elizabeth J Williamson, Venexia M Walker, Tom M Palmer, Rachel Denholm, Rochelle Knight, Helen J Curtis, Alex J Walker, Colm D Andrews, Amir Mehrkar, Jessica Morley, Brian Mackenna, Sebastian C J Bacon, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne, null null
Effectiveness of mRNA COVID-19 Vaccines as First Booster Doses in England: An Observational Study in OpenSAFELY-TPP. Epidemiology (Cambridge, Mass.) 35 (4) (2024)
Elsie M F Horne, William J Hulme, Edward P K Parker, Ruth H Keogh, Elizabeth J Williamson, Venexia M Walker, Tom M Palmer, Rachel Denholm, Rochelle Knight, Helen J Curtis, Alex J Walker, Colm D Andrews, Amir Mehrkar, Jessica Morley, Brian Mackenna, Sebastian C J Bacon, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne, null null
Effectiveness of mRNA COVID-19 Vaccines as First Booster Doses in England: An Observational Study in OpenSAFELY-TPP. Epidemiology (Cambridge, Mass.) 35 (4) (2024)
null null, Christopher Wood, Victoria Speed, Louis Fisher, Helen J Curtis, Andrea L Schaffer, Alex J Walker, Richard Croker, Andrew D Brown, Christine Cunningham, William J Hulme, Colm D Andrews, Ben F C Butler-Cole, David Evans, Peter Inglesby, Iain Dillingham, Sebastian C J Bacon, Simon Davy, Tom Ward, George Hickman, Lucy Bridges, Thomas O'Dwyer, Steven Maude, Rebecca M Smith, Amir Mehrkar, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Alex J Walker, Brian Mackenna
The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records. British journal of clinical pharmacology (2024)
Lisa E M Hopcroft, Helen J Curtis, Richard Croker, Felix Pretis, Peter Inglesby, David Evans, Sebastian C J Bacon, Alex J Walker, Alex J Walker, Brian Mackenna
Data-Driven Identification of Potentially Successful Intervention Implementations Using 5 Years of Opioid Prescribing Data: Retrospective Database Study. JMIR public health and surveillance 10 (2024)
Andrea L Schaffer, Robin Y Park, John Tazare, Krishnan Bhaskaran, Brian MacKenna, Spiros Denaxas, Iain Dillingham, Sebastian C J Bacon, Amir Mehrkar, Christopher Bates, Alex J Walker, Felix Greaves, John Macleod, null null, null null, Laurie A Tomlinson, Alex J Walker
Changes in sick notes associated with COVID-19 from 2020 to 2022: a cohort study in 24 million primary care patients in OpenSAFELY-TPP. BMJ open 14 (7) (2024)
Andrea L Schaffer, Robin Y Park, John Tazare, Krishnan Bhaskaran, Brian MacKenna, Spiros Denaxas, Iain Dillingham, Sebastian C J Bacon, Amir Mehrkar, Christopher Bates, Alex J Walker, Felix Greaves, John Macleod, null null, null null, Laurie A Tomlinson, Alex J Walker
Changes in sick notes associated with COVID-19 from 2020 to 2022: a cohort study in 24 million primary care patients in OpenSAFELY-TPP. BMJ open 14 (7) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
Milan Wiedemann, Victoria Speed, Christine Cunningham, Rose Higgins, Helen J Curtis, Colm D Andrews, Louis Fisher, Lisa Hopcroft, Christopher T Rentsch, Viyaasan Mahalingasivam, Laurie A Tomlinson, Caroline E Morton, Miriam Samuel, Amelia Green, Christopher Wood, Andrew D Brown, Jon Massey, Caroline Walters, Rebecca M Smith, Peter Inglesby, David Evans, Steven Maude, Iain Dillingham, Alex J Walker, Jessica Morley, Amir Mehrkar, Sebastian C J Bacon, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Richard J McManus, Alex J Walker, Brian Mackenna
Impact of COVID-19 on recorded blood pressure screening and hypertension management in England: an analysis of monthly changes in the quality and outcomes framework indicators in OpenSAFELY. Open heart 11 (2) (2024)
null null, Christopher Wood, Victoria Speed, Louis Fisher, Helen J Curtis, Andrea L Schaffer, Alex J Walker, Richard Croker, Andrew D Brown, Christine Cunningham, William J Hulme, Colm D Andrews, Ben F C Butler-Cole, David Evans, Peter Inglesby, Iain Dillingham, Sebastian C J Bacon, Simon Davy, Tom Ward, George Hickman, Lucy Bridges, Thomas O'Dwyer, Steven Maude, Rebecca M Smith, Amir Mehrkar, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Alex J Walker, Brian Mackenna
The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records. British journal of clinical pharmacology 90 (7) (2024)
null null, Christopher Wood, Victoria Speed, Louis Fisher, Helen J Curtis, Andrea L Schaffer, Alex J Walker, Richard Croker, Andrew D Brown, Christine Cunningham, William J Hulme, Colm D Andrews, Ben F C Butler-Cole, David Evans, Peter Inglesby, Iain Dillingham, Sebastian C J Bacon, Simon Davy, Tom Ward, George Hickman, Lucy Bridges, Thomas O'Dwyer, Steven Maude, Rebecca M Smith, Amir Mehrkar, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Alex J Walker, Brian Mackenna
The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records. British journal of clinical pharmacology 90 (7) (2024)
Lisa E M Hopcroft, Helen J Curtis, Richard Croker, Felix Pretis, Peter Inglesby, David Evans, Sebastian C J Bacon, Alex J Walker, Alex J Walker, Brian Mackenna
Data-Driven Identification of Potentially Successful Intervention Implementations Using 5 Years of Opioid Prescribing Data: Retrospective Database Study. JMIR public health and surveillance 10 (2024)
Elsie M F Horne, William J Hulme, Edward P K Parker, Ruth H Keogh, Elizabeth J Williamson, Venexia M Walker, Tom M Palmer, Rachel Denholm, Rochelle Knight, Helen J Curtis, Alex J Walker, Colm D Andrews, Amir Mehrkar, Jessica Morley, Brian Mackenna, Sebastian C J Bacon, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne, null null
Effectiveness of mRNA COVID-19 Vaccines as First Booster Doses in England: An Observational Study in OpenSAFELY-TPP. Epidemiology (Cambridge, Mass.) 35 (4) (2024)
null null, Christopher Wood, Victoria Speed, Louis Fisher, Helen J Curtis, Andrea L Schaffer, Alex J Walker, Richard Croker, Andrew D Brown, Christine Cunningham, William J Hulme, Colm D Andrews, Ben F C Butler-Cole, David Evans, Peter Inglesby, Iain Dillingham, Sebastian C J Bacon, Simon Davy, Tom Ward, George Hickman, Lucy Bridges, Thomas O'Dwyer, Steven Maude, Rebecca M Smith, Amir Mehrkar, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Alex J Walker, Brian Mackenna
The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records. British journal of clinical pharmacology 90 (7) (2024)
null null, Christopher Wood, Victoria Speed, Louis Fisher, Helen J Curtis, Andrea L Schaffer, Alex J Walker, Richard Croker, Andrew D Brown, Christine Cunningham, William J Hulme, Colm D Andrews, Ben F C Butler-Cole, David Evans, Peter Inglesby, Iain Dillingham, Sebastian C J Bacon, Simon Davy, Tom Ward, George Hickman, Lucy Bridges, Thomas O'Dwyer, Steven Maude, Rebecca M Smith, Amir Mehrkar, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Alex J Walker, Brian Mackenna
The impact of COVID-19 on medication reviews in English primary care. An OpenSAFELY-TPP analysis of 20 million adult electronic health records. British journal of clinical pharmacology 90 (7) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
Andrea L Schaffer, Robin Y Park, John Tazare, Krishnan Bhaskaran, Brian MacKenna, Spiros Denaxas, Iain Dillingham, Sebastian C J Bacon, Amir Mehrkar, Christopher Bates, Alex J Walker, Felix Greaves, John Macleod, null null, null null, Laurie A Tomlinson, Alex J Walker
Changes in sick notes associated with COVID-19 from 2020 to 2022: a cohort study in 24 million primary care patients in OpenSAFELY-TPP. BMJ open 14 (7) (2024)
Genevieve I Cezard, Rachel E Denholm, Rochelle Knight, Yinghui Wei, Lucy Teece, Renin Toms, Harriet J Forbes, Alex J Walker, Louis Fisher, Jon Massey, Lisa E M Hopcroft, Elsie M F Horne, Kurt Taylor, Tom M Palmer, Marwa Al Arab, Jose Ignacio Cuitun Coronado, Samantha H Y Ip, Simon Davy, Iain Dillingham, Sebastian Bacon, Amir Mehrkar, Caroline E Morton, Felix Greaves, Catherine Hyams, George Davey Smith, John Macleod, Nishi Chaturvedi, Ben Goldacre, William N Whiteley, Angela M Wood, Jonathan A C Sterne, Venexia M Walker, null null
Impact of vaccination on the association of COVID-19 with cardiovascular diseases: An OpenSAFELY cohort study. Nature communications 15 (1) (2024)
William J Hulme, Elizabeth J Williamson, Elsie M F Horne, Amelia C A Green, Helen I McDonald, Alex J Walker, Helen J Curtis, Caroline E Morton, Brian Mackenna, Richard Croker, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Laurie A Tomlinson, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Tom M Palmer, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data. Annals of internal medicine (2023)
William J Hulme, Elizabeth J Williamson, Elsie M F Horne, Amelia C A Green, Helen I McDonald, Alex J Walker, Helen J Curtis, Caroline E Morton, Brian Mackenna, Richard Croker, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Laurie A Tomlinson, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Tom M Palmer, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data. Annals of internal medicine 176 (5) (2023)
null null, Edward Pk Parker, John Tazare, William J Hulme, Christopher Bates, Edward J Carr, Jonathan Cockburn, Helen J Curtis, Louis Fisher, Amelia Ca Green, Sam Harper, Frank Hester, Elsie Mf Horne, Fiona Loud, Susan Lyon, Viyaasan Mahalingasivam, Amir Mehrkar, Linda Nab, John Parry, Shalini Santhakumaran, Retha Steenkamp, Jonathan A C Sterne, Alex J Walker, Elizabeth J Williamson, Michelle Willicombe, Bang Zheng, Alex J Walker, Dorothea Nitsch, Laurie A Tomlinson
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study. BMJ open 13 (1) (2023)
William J Hulme, Elizabeth J Williamson, Elsie M F Horne, Amelia C A Green, Helen I McDonald, Alex J Walker, Helen J Curtis, Caroline E Morton, Brian Mackenna, Richard Croker, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Laurie A Tomlinson, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Tom M Palmer, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data. Annals of internal medicine 176 (5) (2023)
Amelia C A Green, Helen J Curtis, Rose Higgins, Linda Nab, Viyaasan Mahalingasivam, Rebecca M Smith, Amir Mehrkar, Peter Inglesby, Henry Drysdale, Nicholas J DeVito, Richard Croker, Christopher T Rentsch, Krishnan Bhaskaran, John Tazare, Bang Zheng, Colm D Andrews, Sebastian C J Bacon, Simon Davy, Iain Dillingham, David Evans, Louis Fisher, George Hickman, Lisa E M Hopcroft, William J Hulme, Jon Massey, Orla MacDonald, Jessica Morley, Caroline E Morton, Robin Y Park, Alex J Walker, Tom Ward, Milan Wiedemann, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Ian J Douglas, Stephen J W Evans, Alex J Walker, Laurie A Tomlinson, Brian Mackenna
Trends, variation, and clinical characteristics of recipients of antiviral drugs and neutralising monoclonal antibodies for covid-19 in community settings: retrospective, descriptive cohort study of 23.4 million people in OpenSAFELY. BMJ medicine 2 (1) (2023)
null null, Edward Pk Parker, John Tazare, William J Hulme, Christopher Bates, Edward J Carr, Jonathan Cockburn, Helen J Curtis, Louis Fisher, Amelia Ca Green, Sam Harper, Frank Hester, Elsie Mf Horne, Fiona Loud, Susan Lyon, Viyaasan Mahalingasivam, Amir Mehrkar, Linda Nab, John Parry, Shalini Santhakumaran, Retha Steenkamp, Jonathan A C Sterne, Alex J Walker, Elizabeth J Williamson, Michelle Willicombe, Bang Zheng, Alex J Walker, Dorothea Nitsch, Laurie A Tomlinson
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study. BMJ open 13 (1) (2023)
null null, Edward Pk Parker, John Tazare, William J Hulme, Christopher Bates, Edward J Carr, Jonathan Cockburn, Helen J Curtis, Louis Fisher, Amelia Ca Green, Sam Harper, Frank Hester, Elsie Mf Horne, Fiona Loud, Susan Lyon, Viyaasan Mahalingasivam, Amir Mehrkar, Linda Nab, John Parry, Shalini Santhakumaran, Retha Steenkamp, Jonathan A C Sterne, Alex J Walker, Elizabeth J Williamson, Michelle Willicombe, Bang Zheng, Alex J Walker, Dorothea Nitsch, Laurie A Tomlinson
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study. BMJ open 13 (1) (2023)
Amelia C A Green, Helen J Curtis, Rose Higgins, Linda Nab, Viyaasan Mahalingasivam, Rebecca M Smith, Amir Mehrkar, Peter Inglesby, Henry Drysdale, Nicholas J DeVito, Richard Croker, Christopher T Rentsch, Krishnan Bhaskaran, John Tazare, Bang Zheng, Colm D Andrews, Sebastian C J Bacon, Simon Davy, Iain Dillingham, David Evans, Louis Fisher, George Hickman, Lisa E M Hopcroft, William J Hulme, Jon Massey, Orla MacDonald, Jessica Morley, Caroline E Morton, Robin Y Park, Alex J Walker, Tom Ward, Milan Wiedemann, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Ian J Douglas, Stephen J W Evans, Alex J Walker, Laurie A Tomlinson, Brian Mackenna
Trends, variation, and clinical characteristics of recipients of antiviral drugs and neutralising monoclonal antibodies for covid-19 in community settings: retrospective, descriptive cohort study of 23.4 million people in OpenSAFELY. BMJ medicine 2 (1) (2023)
Helen J Curtis, Brian Mackenna, Milan Wiedemann, Louis Fisher, Richard Croker, Caroline E Morton, Peter Inglesby, Alex J Walker, Jessica Morley, Amir Mehrkar, Sebastian C J Bacon, George Hickman, David Evans, Tom Ward, Simon Davy, William J Hulme, Orla Macdonald, Robin Conibere, Tom Lewis, Martin Myers, Shamila Wanninayake, Kiren Collison, Charles Drury, Miriam Samuel, Harpreet Sood, Andrea Cipriani, Seena Fazel, Manuj Sharma, Wasim Baqir, Christopher Bates, John Parry, Alex J Walker, null null
OpenSAFELY NHS Service Restoration Observatory 2: changes in primary care clinical activity in England during the COVID-19 pandemic. The British journal of general practice : the journal of the Royal College of General Practitioners (2023)
Louis Fisher, Lisa E M Hopcroft, Sarah Rodgers, James Barrett, Kerry Oliver, Anthony J Avery, Dai Evans, Helen J Curtis, Richard Croker, Orla Macdonald, Jessica Morley, Amir Mehrkar, Sebastian C J Bacon, Simon Davy, Iain Dillingham, David Evans, George Hickman, Peter Inglesby, Caroline E Morton, Becky Smith, Tom Ward, William J Hulme, Amelia C A Green, Jon Massey, Alex J Walker, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Shaun O'Hanlon, Alex Eavis, Richard Jarvis, Dima Avramov, Paul Griffiths, Aaron Fowles, Nasreen Parkes, Alex J Walker, Brian Mackenna
Changes in medication safety indicators in England throughout the covid-19 pandemic using OpenSAFELY: population based, retrospective cohort study of 57 million patients using federated analytics. BMJ medicine 2 (1) (2023)
Lisa E M Hopcroft, Jon Massey, Helen J Curtis, Brian Mackenna, Richard Croker, Andrew D Brown, Thomas O'Dwyer, Orla Macdonald, David Evans, Peter Inglesby, Sebastian C J Bacon, Alex J Walker, Alex J Walker
Data-Driven Identification of Unusual Prescribing Behavior: Analysis and Use of an Interactive Data Tool Using 6 Months of Primary Care Data From 6500 Practices in England. JMIR medical informatics 11 (2023)
Lisa E M Hopcroft, Helen J Curtis, Andrew D Brown, William J Hulme, Colm D Andrews, Caroline E Morton, Peter Inglesby, Jessica Morley, Amir Mehrkar, Sebastian C Bacon, Rosalind M M Eggo, Viyaasan Mahalingasivam, Edward P K Parker, Laurie A Tomlinson, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Ben Goldacre, Alex J Walker, Brian MacKenna
First dose COVID-19 vaccine coverage amongst adolescents and children in England: an analysis of 3.21 million patients' primary care records in situ using OpenSAFELY. Wellcome open research 8 (2023)
null null, Edward Pk Parker, John Tazare, William J Hulme, Christopher Bates, Edward J Carr, Jonathan Cockburn, Helen J Curtis, Louis Fisher, Amelia Ca Green, Sam Harper, Frank Hester, Elsie Mf Horne, Fiona Loud, Susan Lyon, Viyaasan Mahalingasivam, Amir Mehrkar, Linda Nab, John Parry, Shalini Santhakumaran, Retha Steenkamp, Jonathan A C Sterne, Alex J Walker, Elizabeth J Williamson, Michelle Willicombe, Bang Zheng, Alex J Walker, Dorothea Nitsch, Laurie A Tomlinson
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study. BMJ open 13 (1) (2023)
William J Hulme, Elizabeth J Williamson, Elsie M F Horne, Amelia C A Green, Helen I McDonald, Alex J Walker, Helen J Curtis, Caroline E Morton, Brian Mackenna, Richard Croker, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Laurie A Tomlinson, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Tom M Palmer, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data. Annals of internal medicine 176 (5) (2023)
William J Hulme, Elizabeth J Williamson, Elsie M F Horne, Amelia C A Green, Helen I McDonald, Alex J Walker, Helen J Curtis, Caroline E Morton, Brian Mackenna, Richard Croker, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Laurie A Tomlinson, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Tom M Palmer, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Challenges in Estimating the Effectiveness of COVID-19 Vaccination Using Observational Data. Annals of internal medicine (2023)
null null, Edward Pk Parker, John Tazare, William J Hulme, Christopher Bates, Edward J Carr, Jonathan Cockburn, Helen J Curtis, Louis Fisher, Amelia Ca Green, Sam Harper, Frank Hester, Elsie Mf Horne, Fiona Loud, Susan Lyon, Viyaasan Mahalingasivam, Amir Mehrkar, Linda Nab, John Parry, Shalini Santhakumaran, Retha Steenkamp, Jonathan A C Sterne, Alex J Walker, Elizabeth J Williamson, Michelle Willicombe, Bang Zheng, Alex J Walker, Dorothea Nitsch, Laurie A Tomlinson
Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study. BMJ open 13 (1) (2023)
Brian Mackenna, Helen J Curtis, Lisa E M Hopcroft, Alex J Walker, Richard Croker, Orla Macdonald, Stephen J W Evans, Peter Inglesby, David Evans, Jessica Morley, Sebastian C J Bacon, Alex J Walker
Identifying Patterns of Clinical Interest in Clinicians' Treatment Preferences: Hypothesis-free Data Science Approach to Prioritizing Prescribing Outliers for Clinical Review. JMIR medical informatics 10 (12) (2022)
Ellen Jo Thompson, Dylan M Williams, Alex J Walker, Ruth E Mitchell, Claire L Niedzwiedz, Tiffany C Yang, Charlotte F Huggins, Alex S F Kwong, Richard J Silverwood, Giorgio Di Gessa, Ruth C E Bowyer, Kate Northstone, Bo Hou, Michael James Green, Brian Dodgeon, Katie J Doores, Emma L Duncan, Frances M K Williams, null null, Andrew Steptoe, David J Porteous, Rosemary R C McEachan, Laurie A Tomlinson, Ben Goldacre, Praveetha Patalay, George B Ploubidis, Vittal Srinivasa Katikireddi, Kate Tilling, Christopher T Rentsch, Nicholas John Timpson, Nishi Chaturvedi, Claire J Steves
Long COVID burden and risk factors in 10 UK longitudinal studies and electronic health records. Nature communications 13 (1) (2022)
Elsie M F Horne, William J Hulme, Ruth H Keogh, Tom M Palmer, Elizabeth J Williamson, Edward P K Parker, Amelia C A Green, Venexia M Walker, Alex J Walker, Helen J Curtis, Louis Fisher, Brian Mackenna, Richard Croker, Lisa E M Hopcroft, Robin Y Park, Jon Massey, Jessica Morley, Amir Mehrkar, Sebastian C J Bacon, David Evans, Peter Inglesby, Caroline E Morton, George Hickman, Simon Davy, Tom Ward, Iain Dillingham, Alex J Walker, Miguel A Hernán, Jonathan A C Sterne
Waning effectiveness of BNT162b2 and ChAdOx1 covid-19 vaccines over six months since second dose: OpenSAFELY cohort study using linked electronic health records. BMJ (Clinical research ed.) 378 (2022)
Brian Mackenna, Helen J Curtis, Lisa E M Hopcroft, Alex J Walker, Richard Croker, Orla Macdonald, Stephen J W Evans, Peter Inglesby, David Evans, Jessica Morley, Sebastian C J Bacon, Alex J Walker
Identifying Patterns of Clinical Interest in Clinicians' Treatment Preferences: Hypothesis-free Data Science Approach to Prioritizing Prescribing Outliers for Clinical Review. JMIR medical informatics 10 (12) (2022)
null null, John Tazare, Alex J Walker, Laurie A Tomlinson, George Hickman, Christopher T Rentsch, Elizabeth J Williamson, Krishnan Bhaskaran, David Evans, Kevin Wing, Rohini Mathur, Angel Yun Wong, Anna Schultze, Seb Bacon, Chris Bates, Caroline E Morton, Helen J Curtis, Emily Nightingale, Helen I McDonald, Amir Mehrkar, Peter Inglesby, Simon Davy, Brian MacKenna, Jonathan Cockburn, William J Hulme, Charlotte Warren-Gash, Ketaki Bhate, Dorothea Nitsch, Emma Powell, Amy Mulick, Harriet Forbes, Caroline Minassian, Richard Croker, John Parry, Frank Hester, Sam Harper, Rosalind M M Eggo, Stephen J W Evans, Liam Smeeth, Ian J Douglas, Ben Goldacre
Rates of serious clinical outcomes in survivors of hospitalisation with COVID-19 in England: a descriptive cohort study within the OpenSAFELY platform. Wellcome open research 7 (2022)
Olivia V Swann, Nazir I Lone, Ewen M Harrison, Laurie A Tomlinson, Alex J Walker, Michael J Seaborne, Louisa Pollock, James Farrell, Peter S Hall, Sohan Seth, Thomas C Williams, Jennifer Preston, J Samantha Ainsworth, Freya F Semple, J Kenneth Baillie, Vittal Srinivasa Katikireddi, Ashley Akbari, Ronan A Lyons, Colin R Simpson, Malcolm G Semple, Alex J Walker, Sinead Brophy, Aziz Sheikh, Annemarie B Docherty
Studying the Long-term Impact of COVID-19 in Kids (SLICK). Healthcare use and costs in children and young people following community-acquired SARS-CoV-2 infection: protocol for an observational study using linked primary and secondary routinely collected healthcare data from England, Scotland and Wales. BMJ open 12 (11) (2022)
null null, John Tazare, Alex J Walker, Laurie A Tomlinson, George Hickman, Christopher T Rentsch, Elizabeth J Williamson, Krishnan Bhaskaran, David Evans, Kevin Wing, Rohini Mathur, Angel Yun Wong, Anna Schultze, Seb Bacon, Chris Bates, Caroline E Morton, Helen J Curtis, Emily Nightingale, Helen I McDonald, Amir Mehrkar, Peter Inglesby, Simon Davy, Brian MacKenna, Jonathan Cockburn, William J Hulme, Charlotte Warren-Gash, Ketaki Bhate, Dorothea Nitsch, Emma Powell, Amy Mulick, Harriet Forbes, Caroline Minassian, Richard Croker, John Parry, Frank Hester, Sam Harper, Rosalind M M Eggo, Stephen J W Evans, Liam Smeeth, Ian J Douglas, Ben Goldacre
Rates of serious clinical outcomes in survivors of hospitalisation with COVID-19 in England: a descriptive cohort study within the OpenSAFELY platform. Wellcome open research 7 (2022)
William J Hulme, Elizabeth J Williamson, Amelia C A Green, Krishnan Bhaskaran, Helen I McDonald, Christopher T Rentsch, Anna Schultze, John Tazare, Helen J Curtis, Alex J Walker, Laurie A Tomlinson, Tom M Palmer, Elsie M F Horne, Brian Mackenna, Caroline E Morton, Amir Mehrkar, Jessica Morley, Louis Fisher, Sebastian C J Bacon, David Evans, Peter Inglesby, George Hickman, Simon Davy, Tom Ward, Richard Croker, Rosalind M M Eggo, Angel Yun Wong, Rohini Mathur, Kevin Wing, Harriet J Forbes, Daniel J Grint, Ian J Douglas, Stephen J W Evans, Liam Smeeth, Christopher Bates, Jonathan Cockburn, John Parry, Frank Hester, Sam Harper, Jonathan A C Sterne, Miguel A Hernán, Alex J Walker
Comparative effectiveness of ChAdOx1 versus BNT162b2 covid-19 vaccines in health and social care workers in England: cohort study using OpenSAFELY. BMJ (Clinical research ed.) 378 (2022)
Brian Mackenna, Helen J Curtis, Lisa E M Hopcroft, Alex J Walker, Richard Croker, Orla Macdonald, Stephen J W Evans, Peter Inglesby, David Evans, Jessica Morley, Sebastian C J Bacon, Alex J Walker
Identifying Patterns of Clinical Interest in Clinicians' Treatment Preferences: Hypothesis-free Data Science Approach to Prioritizing Prescribing Outliers for Clinical Review. JMIR medical informatics 10 (12) (2022)
Krishnan Bhaskaran, Christopher T Rentsch, George Hickman, William J Hulme, Anna Schultze, Helen J Curtis, Kevin Wing, Charlotte Warren-Gash, Laurie A Tomlinson, Christopher Bates, Rohini Mathur, Brian Mackenna, Viyaasan Mahalingasivam, Angel Yun Wong, Alex J Walker, Caroline E Morton, Daniel J Grint, Amir Mehrkar, Rosalind M M Eggo, Peter Inglesby, Ian J Douglas, Helen I McDonald, Jonathan Cockburn, Elizabeth J Williamson, David Evans, John Parry, Frank Hester, Sam Harper, Stephen Jw Evans, Sebastian C J Bacon, Liam Smeeth, Alex J Walker
Overall and cause-specific hospitalisation and death after COVID-19 hospitalisation in England: A cohort study using linked primary care, secondary care, and death registration data in the OpenSAFELY platform. PLoS medicine 19 (1) (2022)
null null, Helen J Curtis, Brian Mackenna, Alex J Walker, Richard Croker, Amir Mehrkar, Caroline E Morton, Sebastian C J Bacon, George Hickman, Peter Inglesby, Christopher Bates, David Evans, Tom Ward, Jonathan Cockburn, Simon Davy, Krishnan Bhaskaran, Anna Schultze, Christopher T Rentsch, Elizabeth Williamson, William J Hulme, Laurie A Tomlinson, Rohini Mathur, Henry Drysdale, Rosalind M M Eggo, Angel Yun Wong, Harriet J Forbes, John Parry, Frank Hester, Sam Harper, Ian J Douglas, Liam Smeeth, Alex J Walker
OpenSAFELY: impact of national guidance on switching anticoagulant therapy during COVID-19 pandemic. Open heart 8 (2) (2021)
Helen J Curtis, Seb Bacon, Richard Croker, Alex J Walker, Rafael Perera, Michael Hallsworth, Hugo Harper, Kamal R Mahtani, Carl Heneghan, Alex J Walker
Evaluating the impact of a very low-cost intervention to increase practices' engagement with data and change prescribing behaviour: a randomized trial in English primary care. Family practice 38 (4) (2021)
Paul Bogowicz, Helen J Curtis, Alex J Walker, Philip Cowen, John Geddes, Ben Goldacre
Trends and variation in antidepressant prescribing in English primary care: a retrospective longitudinal study. BJGP open 5 (4) (2021)
Michael Liu, Brian Mackenna, William B Feldman, Alex J Walker, Jerry Avorn, Aaron S Kesselheim, Ben Goldacre
Projected spending for brand-name drugs in English primary care given US prices: a cross-sectional study. Journal of the Royal Society of Medicine 113 (9) (2020)
Brian Mackenna, Sebastian C J Bacon, Alex J Walker, Helen J Curtis, Richard Croker, Alex J Walker
Impact of Electronic Health Record Interface Design on Unsafe Prescribing of Ciclosporin, Tacrolimus, and Diltiazem: Cohort Study in English National Health Service Primary Care. Journal of medical Internet research 22 (10) (2020)
Elizabeth J Williamson, Alex J Walker, Krishnan Bhaskaran, Seb Bacon, Christopher Bates, Caroline E Morton, Helen J Curtis, Amir Mehrkar, David Evans, Peter Inglesby, Jonathan Cockburn, Helen I McDonald, Brian MacKenna, Laurie A Tomlinson, Ian J Douglas, Christopher T Rentsch, Rohini Mathur, Angel Y S Wong, Richard Grieve, David A Harrison, Harriet Forbes, Anna Schultze, Richard Croker, John Parry, Frank Hester, Sam Harper, Rafael Perera, Stephen J W Evans, Liam Smeeth, Alex J Walker
Factors associated with COVID-19-related death using OpenSAFELY. Nature 584 (7821) (2020)
Ben Goldacre, Carl Reynolds, Anna Powell-Smith, Alex J Walker, Tom A Yates, Richard Croker, Liam Smeeth
Do doctors in dispensing practices with a financial conflict of interest prescribe more expensive drugs? A cross-sectional analysis of English primary care prescribing data. BMJ open 9 (2) (2019)
Alex J Walker, Helen J Curtis, Richard Croker, Sebastian C J Bacon, Alex J Walker
Measuring the Impact of an Open Web-Based Prescribing Data Analysis Service on Clinical Practice: Cohort Study on NHS England Data. Journal of medical Internet research 21 (1) (2019)
Helen J Curtis, John M Dennis, Beverley M Shields, Alex J Walker, Seb Bacon, Andrew T Hattersley, Angus G Jones, Alex J Walker
Time trends and geographical variation in prescribing of drugs for diabetes in England from 1998 to 2017. Diabetes, obesity & metabolism 20 (9) (2018)
Alex J Walker, Helen J Curtis, Seb Bacon, Richard Croker, Ben Goldacre
Trends and variation in prescribing of low-priority treatments identified by NHS England: a cross-sectional study and interactive data tool in English primary care. Journal of the Royal Society of Medicine 111 (6) (2018)
Alex J Walker, Seb Bacon, Helen Curtis, Richard Croker, Brian Mackenna, Ben Goldacre
Six months on: NHS England needs to focus on dissemination, implementation and audit of its low-priority initiative. Journal of the Royal Society of Medicine 112 (1) (2018)
Richard Croker, Alex J Walker, Seb Bacon, Helen J Curtis, Lisa French, Ben Goldacre
New mechanism to identify cost savings in English NHS prescribing: minimising 'price per unit', a cross-sectional study. BMJ open 8 (2) (2018)
Alex J Walker, Helen J Curtis, Seb Bacon, Richard Croker, Ben Goldacre
Trends, geographical variation and factors associated with prescribing of gluten-free foods in English primary care: a cross-sectional study. BMJ open 8 (3) (2018)
Richard Croker, Darren Smyth, Alex J Walker, Ben Goldacre
The clinician impact and financial cost to the NHS of litigation over pregabalin: a cohort study in English primary care. BMJ open 8 (6) (2018)
David J Humes, A Abdul-Sultan, Alex J Walker, Jonas F Ludvigsson, Prof Joe West
Duration and magnitude of postoperative risk of venous thromboembolism after planned inguinal hernia repair in men: a population-based cohort study. Hernia : the journal of hernias and abdominal wall surgery 22 (3) (2018)
Alex J Walker, Richard Croker, Seb Bacon, Edzard Ernst, Helen J Curtis, Ben Goldacre
Is use of homeopathy associated with poor prescribing in English primary care? A cross-sectional study. Journal of the Royal Society of Medicine 111 (5) (2018)

Alex J Walker.css-eqlu8i{font-size:small;padding-left:4px;} (A J Walker, Alex Walker)

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Alex J Walker (A J Walker, Alex Walker)