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Author: Alex J Walker

Rankings

  • All-time downloads: 245,208 (rank: 394 )
  • Categories:
    • cardiovascular medicine: 1,256 (rank: 705 (tie) )
    • epidemiology: 201,776 (rank: 94 )
    • health informatics: 438 (rank: 3,524 (tie) )
    • health systems and quality improvement: 1,941 (rank: 265 (tie) )
    • infectious diseases: 20,673 (rank: 3,921 (tie) )
    • microbiology: 918 (rank: 25,507 (tie) )
    • primary care research: 1,932 (rank: 103 (tie) )
    • psychiatry and clinical psychology: 173 (rank: 9,169 (tie) )
    • public and global health: 6,798 (rank: 980 (tie) )
    • respiratory medicine: 2,873 (rank: 447 (tie) )

Downloads per author, site-wide

Preprints

OpenSAFELY: factors associated with COVID-19-related hospital death in the linked electronic health records of 17 million adult NHS patients.

epidemiology more details view paper
  • Downloaded 164,654 times
  • Download rankings, all-time:
    • Site-wide: 33
    • In epidemiology: 7
  • Year to date:
    • Site-wide: 585
  • Since beginning of last month:
    • Site-wide: 345

Association between living with children and outcomes from COVID-19: an OpenSAFELY cohort study of 12 million adults in England

epidemiology more details view paper
  • Downloaded 13,424 times
  • Download rankings, all-time:
    • Site-wide: 928
    • In epidemiology: 136
  • Year to date:
    • Site-wide: 15,875
  • Since beginning of last month:
    • Site-wide: 29,433

Case fatality risk of the SARS-CoV-2 variant of concern B.1.1.7 in England

infectious diseases more details view paper
  • Downloaded 11,315 times
  • Download rankings, all-time:
    • Site-wide: 1,166
    • In infectious diseases: 376
  • Year to date:
    • Site-wide: 5,411
  • Since beginning of last month:
    • Site-wide: None

Risk factors for long COVID: analyses of 10 longitudinal studies and electronic health records in the UK

epidemiology more details view paper
  • Downloaded 7,362 times
  • Download rankings, all-time:
    • Site-wide: 2,006
    • In epidemiology: 259
  • Year to date:
    • Site-wide: 1,037
  • Since beginning of last month:
    • Site-wide: 8,622

Trends and clinical characteristics of COVID-19 vaccine recipients: a federated analysis of 57.9 million patients primary care records in situ using OpenSAFELY.

public and global health more details view paper
  • Downloaded 6,669 times
  • Download rankings, all-time:
    • Site-wide: 2,318
    • In public and global health: 89
  • Year to date:
    • Site-wide: 3,732
  • Since beginning of last month:
    • Site-wide: 7,387

Comparative effectiveness of sotrovimab and molnupiravir for prevention of severe COVID-19 outcomes in non-hospitalised patients: an observational cohort study using the OpenSAFELY platform

epidemiology more details view paper
  • Downloaded 3,740 times
  • Download rankings, all-time:
    • Site-wide: 5,165
    • In epidemiology: 926
  • Year to date:
    • Site-wide: 467
  • Since beginning of last month:
    • Site-wide: 228

Inhaled corticosteroid use and risk COVID-19 related death among 966,461 patients with COPD or asthma: an OpenSAFELY analysis

respiratory medicine more details view paper
  • Downloaded 2,916 times
  • Download rankings, all-time:
    • Site-wide: 7,396
    • In respiratory medicine: 28
  • Year to date:
    • Site-wide: 63,668
  • Since beginning of last month:
    • Site-wide: 35,622

Ethnic differences in COVID-19 infection, hospitalisation, and mortality: an OpenSAFELY analysis of 17 million adults in England

epidemiology more details view paper
  • Downloaded 2,581 times
  • Download rankings, all-time:
    • Site-wide: 8,863
    • In epidemiology: 725
  • Year to date:
    • Site-wide: 29,129
  • Since beginning of last month:
    • Site-wide: 41,814

The clinician impact and financial cost to the NHS of litigation over pregabalin: a cohort study in English primary care

epidemiology more details view paper
  • Downloaded 1,939 times
  • Download rankings, all-time:
    • Site-wide: 13,659
    • In epidemiology: 986
  • Year to date:
    • Site-wide: 143,763
  • Since beginning of last month:
    • Site-wide: 48,831

Comparative effectiveness of BNT162b2 versus mRNA-1273 boosting in England: a cohort study in OpenSAFELY-TPP

epidemiology more details view paper
  • Downloaded 1,896 times
  • Download rankings, all-time:
    • Site-wide: 14,129
    • In epidemiology: 1,713
  • Year to date:
    • Site-wide: 1,275
  • Since beginning of last month:
    • Site-wide: 1,334

Comparative effectiveness of ChAdOx1 versus BNT162b2 COVID-19 vaccines in Health and Social Care workers in England: a cohort study using OpenSAFELY

epidemiology more details view paper
  • Downloaded 1,884 times
  • Download rankings, all-time:
    • Site-wide: 14,260
    • In epidemiology: 1,044
  • Year to date:
    • Site-wide: 26,426
  • Since beginning of last month:
    • Site-wide: 70,428

Rates of serious clinical outcomes in survivors of hospitalisation with COVID-19: a descriptive cohort study within the OpenSAFELY platform

epidemiology more details view paper
  • Downloaded 1,684 times
  • Download rankings, all-time:
    • Site-wide: 16,941
    • In epidemiology: 1,181
  • Year to date:
    • Site-wide: 10,741
  • Since beginning of last month:
    • Site-wide: 21,693

Factors associated with deaths due to COVID-19 versus other causes: population-based cohort analysis of UK primary care data and linked national death registrations within the OpenSAFELY platform

infectious diseases more details view paper
  • Downloaded 1,546 times
  • Download rankings, all-time:
    • Site-wide: 19,379
    • In infectious diseases: 2,240
  • Year to date:
    • Site-wide: 34,001
  • Since beginning of last month:
    • Site-wide: 144,955

Describing the population experiencing COVID-19 vaccine breakthrough following second vaccination in England: A cohort study from OpenSAFELY

epidemiology more details view paper
  • Downloaded 1,460 times
  • Download rankings, all-time:
    • Site-wide: 21,234
    • In epidemiology: 1,359
  • Year to date:
    • Site-wide: 6,876
  • Since beginning of last month:
    • Site-wide: 86,115

HIV infection and COVID-19 death: population-based cohort analysis of UK primary care data and linked national death registrations within the OpenSAFELY platform

infectious diseases more details view paper
  • Downloaded 1,301 times
  • Download rankings, all-time:
    • Site-wide: 25,559
    • In infectious diseases: 2,603
  • Year to date:
    • Site-wide: 66,386
  • Since beginning of last month:
    • Site-wide: None

OpenSAFELY NHS Service Restoration Observatory 1: describing trends and variation in primary care clinical activity for 23.3 million patients in England during the first wave of COVID-19

health systems and quality improvement more details view paper
  • Downloaded 1,287 times
  • Download rankings, all-time:
    • Site-wide: 25,964
    • In health systems and quality improvement: 43
  • Year to date:
    • Site-wide: 76,101
  • Since beginning of last month:
    • Site-wide: 183,934

Clinical coding of long COVID in English primary care: a federated analysis of 58 million patient records in situ using OpenSAFELY

epidemiology more details view paper
  • Downloaded 1,217 times
  • Download rankings, all-time:
    • Site-wide: 28,337
    • In epidemiology: 1,622
  • Year to date:
    • Site-wide: 56,478
  • Since beginning of last month:
    • Site-wide: 172,434

OpenSAFELY: Do adults prescribed Non-steroidal anti-inflammatory drugs have an increased risk of death from COVID-19?

infectious diseases more details view paper
  • Downloaded 1,143 times
  • Download rankings, all-time:
    • Site-wide: 31,330
    • In infectious diseases: 2,890
  • Year to date:
    • Site-wide: 81,559
  • Since beginning of last month:
    • Site-wide: 28,684

Short report: Ethnicity and COVID-19 death in the early part of the COVID-19 second wave in England: an analysis of OpenSAFELY data from 1st September to 9th November 2020

infectious diseases more details view paper
  • Downloaded 994 times
  • Download rankings, all-time:
    • Site-wide: 38,772
    • In infectious diseases: 3,509
  • Year to date:
    • Site-wide: 11,825
  • Since beginning of last month:
    • Site-wide: 109,177

Hydroxychloroquine for prevention of COVID-19 mortality: a population-based cohort study

infectious diseases more details view paper
  • Downloaded 973 times
  • Download rankings, all-time:
    • Site-wide: 40,104
    • In infectious diseases: 3,284
  • Year to date:
    • Site-wide: 134,756
  • Since beginning of last month:
    • Site-wide: 156,869

Trends, variation and clinical characteristics of recipients of antivirals and neutralising monoclonal antibodies for non-hospitalised COVID-19: a descriptive cohort study of 23.4 million people in OpenSAFELY

primary care research more details view paper
  • Downloaded 965 times
  • Download rankings, all-time:
    • Site-wide: 40,660
    • In primary care research: 32
  • Year to date:
    • Site-wide: 3,666
  • Since beginning of last month:
    • Site-wide: 8,202

Why did some practices not implement new antibiotic prescribing guidelines on urinary tract infection? A cohort study and survey in NHS England primary care

microbiology more details view paper
  • Downloaded 960 times
  • Download rankings, all-time:
    • Site-wide: 40,982
    • In microbiology: 2,392
  • Year to date:
    • Site-wide: 60,524
  • Since beginning of last month:
    • Site-wide: 186,726

Waning effectiveness of BNT162b2 and ChAdOx1 COVID-19 vaccines over six months since second dose: a cohort study using linked electronic health records

infectious diseases more details view paper
  • Downloaded 910 times
  • Download rankings, all-time:
    • Site-wide: 44,424
    • In infectious diseases: 3,487
  • Year to date:
    • Site-wide: 4,018
  • Since beginning of last month:
    • Site-wide: 52,169

A New Mechanism To Identify Cost Savings in NHS Prescribing: Minimising 'Price-Per-Unit'

epidemiology more details view paper
  • Downloaded 902 times
  • Download rankings, all-time:
    • Site-wide: 44,970
    • In epidemiology: 2,277
  • Year to date:
    • Site-wide: 186,690
  • Since beginning of last month:
    • Site-wide: 80,110

Risk of severe COVID-19 outcomes associated with immune-mediated inflammatory diseases and immune modifying therapies: a nationwide cohort study in the OpenSAFELY platform

infectious diseases more details view paper
  • Downloaded 804 times
  • Download rankings, all-time:
    • Site-wide: 53,563
    • In infectious diseases: 3,902
  • Year to date:
    • Site-wide: 14,605
  • Since beginning of last month:
    • Site-wide: 121,470

OpenSAFELY: impact of national guidance on switching from warfarin to direct oral anticoagulants (DOACs) in early phase of COVID-19 pandemic in England

cardiovascular medicine more details view paper
  • Downloaded 789 times
  • Download rankings, all-time:
    • Site-wide: 55,094
    • In cardiovascular medicine: 108
  • Year to date:
    • Site-wide: 81,580
  • Since beginning of last month:
    • Site-wide: 109,947

OpenSAFELY: Risks of COVID-19 hospital admission and death for people with learning disabilities - a cohort study.

infectious diseases more details view paper
  • Downloaded 709 times
  • Download rankings, all-time:
    • Site-wide: 64,311
    • In infectious diseases: 4,155
  • Year to date:
    • Site-wide: 42,341
  • Since beginning of last month:
    • Site-wide: 177,262

Trends and variation in unsafe prescribing of methotrexate: a cohort study in English NHS primary care.

health systems and quality improvement more details view paper
  • Downloaded 704 times
  • Download rankings, all-time:
    • Site-wide: 64,972
    • In health systems and quality improvement: 94
  • Year to date:
    • Site-wide: 119,834
  • Since beginning of last month:
    • Site-wide: 111,276

Changes in COVID-19-related mortality across key demographic and clinical subgroups: an observational cohort study using the OpenSAFELY platform on 18 million adults in England

epidemiology more details view paper
  • Downloaded 607 times
  • Download rankings, all-time:
    • Site-wide: 79,317
    • In epidemiology: 6,071
  • Year to date:
    • Site-wide: 7,891
  • Since beginning of last month:
    • Site-wide: 2,313

Association between oral anticoagulants and COVID-19 related outcomes: two cohort studies

epidemiology more details view paper
  • Downloaded 599 times
  • Download rankings, all-time:
    • Site-wide: 80,745
    • In epidemiology: 3,607
  • Year to date:
    • Site-wide: 57,843
  • Since beginning of last month:
    • Site-wide: 169,631

Changes in the rate of cardiometabolic and pulmonary events during the COVID-19 pandemic

epidemiology more details view paper
  • Downloaded 551 times
  • Download rankings, all-time:
    • Site-wide: 89,632
    • In epidemiology: 3,868
  • Year to date:
    • Site-wide: 43,897
  • Since beginning of last month:
    • Site-wide: 178,828

Accident and emergency (AE) attendance in England following infection with SARS-CoV-2 Omicron or Delta

infectious diseases more details view paper
  • Downloaded 526 times
  • Download rankings, all-time:
    • Site-wide: 94,636
    • In infectious diseases: 5,280
  • Year to date:
    • Site-wide: 9,913
  • Since beginning of last month:
    • Site-wide: 147,348

Trends and variation in prescribing of suboptimal statin treatment regimes: a cohort study in English primary care

cardiovascular medicine more details view paper
  • Downloaded 522 times
  • Download rankings, all-time:
    • Site-wide: 95,501
    • In cardiovascular medicine: 211
  • Year to date:
    • Site-wide: 157,760
  • Since beginning of last month:
    • Site-wide: 113,053

Overall and cause-specific hospitalisation and death after COVID-19 hospitalisation in England: cohort study in OpenSAFELY using linked primary care, secondary care and death registration data

infectious diseases more details view paper
  • Downloaded 456 times
  • Download rankings, all-time:
    • Site-wide: 110,669
    • In infectious diseases: 5,814
  • Year to date:
    • Site-wide: 56,491
  • Since beginning of last month:
    • Site-wide: 98,091

Impact Of Electronic Health Record Interface Design On Unsafe Prescribing Of Ciclosporin, Tacrolimus and Diltiazem: A Cohort Study In English NHS Primary Care

health informatics more details view paper
  • Downloaded 455 times
  • Download rankings, all-time:
    • Site-wide: 110,792
    • In health informatics: 475
  • Year to date:
    • Site-wide: 178,026
  • Since beginning of last month:
    • Site-wide: 142,905

Potentially inappropriate prescribing of DOACs to patients with mechanical heart valves: a federated analysis of 57.9 million patients' primary care records in situ using OpenSAFELY

primary care research more details view paper
  • Downloaded 454 times
  • Download rankings, all-time:
    • Site-wide: 111,037
    • In primary care research: 102
  • Year to date:
    • Site-wide: 70,213
  • Since beginning of last month:
    • Site-wide: 57,931

Predicting COVID-19 related death using the OpenSAFELY platform

infectious diseases more details view paper
  • Downloaded 454 times
  • Download rankings, all-time:
    • Site-wide: 111,048
    • In infectious diseases: 5,639
  • Year to date:
    • Site-wide: 48,784
  • Since beginning of last month:
    • Site-wide: 179,575

Effectiveness of BNT162b2 booster doses in England: an observational study in OpenSAFELY-TPP

epidemiology more details view paper
  • Downloaded 432 times
  • Download rankings, all-time:
    • Site-wide: 116,733
    • In epidemiology: 5,429
  • Year to date:
    • Site-wide: 13,891
  • Since beginning of last month:
    • Site-wide: 146,053

Trends, geographic variation, and factors associated with prescribing of gluten-free foods in English primary care: a cross sectional study

epidemiology more details view paper
  • Downloaded 359 times
  • Download rankings, all-time:
    • Site-wide: 137,103
    • In epidemiology: 5,603
  • Year to date:
    • Site-wide: 203,201
  • Since beginning of last month:
    • Site-wide: 76,893

Trends and variation in Prescribing of Low-Priority Medicines Identified by NHS England: A Cross-Sectional Study and Interactive Data Tool in English Primary Care

epidemiology more details view paper
  • Downloaded 351 times
  • Download rankings, all-time:
    • Site-wide: 139,354
    • In epidemiology: 5,788
  • Year to date:
    • Site-wide: 170,029
  • Since beginning of last month:
    • Site-wide: 39,510

The impact of the COVID-19 pandemic on prescribing of pancreatic enzyme replacement therapy for people with unresectable pancreatic cancer in England. A cohort study using OpenSafely-TPP

primary care research more details view paper
  • Downloaded 347 times
  • Download rankings, all-time:
    • Site-wide: 140,439
    • In primary care research: 157
  • Year to date:
    • Site-wide: 19,841
  • Since beginning of last month:
    • Site-wide: 17,815

Measuring the Impact of an Open Online Prescribing Data Analysis Service on Clinical Practice: a Cohort Study in NHS England Data

epidemiology more details view paper
  • Downloaded 335 times
  • Download rankings, all-time:
    • Site-wide: 144,241
    • In epidemiology: 5,890
  • Year to date:
    • Site-wide: 189,753
  • Since beginning of last month:
    • Site-wide: 130,203

Recording of 'COVID-19 vaccine declined' among vaccination priority groups: a cohort study on 57.9 million NHS patients' primary care records in situ using OpenSAFELY

public and global health more details view paper
  • Downloaded 318 times
  • Download rankings, all-time:
    • Site-wide: 149,409
    • In public and global health: 2,155
  • Year to date:
    • Site-wide: 99,729
  • Since beginning of last month:
    • Site-wide: 120,221

Changes in English medication safety indicators throughout the COVID-19 pandemic: a federated analysis of 57 million patients' primary care records in situ using OpenSAFELY

primary care research more details view paper
  • Downloaded 282 times
  • Download rankings, all-time:
    • Site-wide: 160,226
    • In primary care research: 142
  • Year to date:
    • Site-wide: 27,648
  • Since beginning of last month:
    • Site-wide: 14,033

OpenSAFELY NHS Service Restoration Observatory 2: changes in primary care activity across six clinical areas during the COVID-19 pandemic

primary care research more details view paper
  • Downloaded 254 times
  • Download rankings, all-time:
    • Site-wide: 168,042
    • In primary care research: 149
  • Year to date:
    • Site-wide: 32,146
  • Since beginning of last month:
    • Site-wide: 14,402

Factors associated with COVID-19 vaccine uptake in people with kidney disease: an OpenSAFELY cohort study

infectious diseases more details view paper
  • Downloaded 219 times
  • Download rankings, all-time:
    • Site-wide: 177,538
    • In infectious diseases: 7,588
  • Year to date:
    • Site-wide: 40,115
  • Since beginning of last month:
    • Site-wide: 121,490

Health care use attributable to COVID-19: A propensity matched national electronic health records cohort study of 249,390 people in Wales, UK.

epidemiology more details view paper
  • Downloaded 219 times
  • Download rankings, all-time:
    • Site-wide: 177,603
    • In epidemiology: 7,174
  • Year to date:
    • Site-wide: 40,111
  • Since beginning of last month:
    • Site-wide: 52,918

A hypothesis-free data science approach to identifying novel patterns of clinical interest in clinicians' treatment preferences: clusters of high Pericyazine and Promazine use in England

psychiatry and clinical psychology more details view paper
  • Downloaded 206 times
  • Download rankings, all-time:
    • Site-wide: 180,702
    • In psychiatry and clinical psychology: 1,165
  • Year to date:
    • Site-wide: 43,503
  • Since beginning of last month:
    • Site-wide: 120,312

Mortality among Care Home Residents in England during the first and second waves of the COVID-19 pandemic: an analysis of 4.3 million adults over the age of 65

epidemiology more details view paper
  • Downloaded 203 times
  • Download rankings, all-time:
    • Site-wide: 181,502
    • In epidemiology: 7,193
  • Year to date:
    • Site-wide: 126,886
  • Since beginning of last month:
    • Site-wide: 152,099

OpenSAFELY: Representativeness of Electronic Health Record platform OpenSAFELY-TPP data compared to the population of England.

primary care research more details view paper
  • Downloaded 166 times
  • Download rankings, all-time:
    • Site-wide: 189,583
    • In primary care research: 163
  • Year to date:
    • Site-wide: 58,320
  • Since beginning of last month:
    • Site-wide: 93,346

Eleven key measures for monitoring general practice clinical activity during COVID-19 using federated analytics on 48 million adults' primary care records through OpenSAFELY

primary care research more details view paper
  • Downloaded 111 times
  • Download rankings, all-time:
    • Site-wide: 199,472
    • In primary care research: None
  • Year to date:
    • Site-wide: 86,997
  • Since beginning of last month:
    • Site-wide: 8,660

Data-driven identification of unusual prescribing behaviour: an analysis and interactive data tool using six months of primary care data from 6500 practices in England

health informatics more details view paper
  • Downloaded 54 times
  • Download rankings, all-time:
    • Site-wide: 208,089
    • In health informatics: None
  • Year to date:
    • Site-wide: 160,321
  • Since beginning of last month:
    • Site-wide: 36,538

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