John Williams

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In-pandemic development of an application ontology for COVID-19 surveillance in a primary care sentinel network.

J. Pell, S. de Lusignan, T. Fahey, 2020, JMIR public health and surveillance.

Excess mortality in the first COVID pandemic peak: cross-sectional analyses of the impact of age, sex, ethnicity, household size, and long-term conditions in people of known SARS-CoV-2 status in England

S. de Lusignan, D. McGagh, R. Byford, 2020, The British journal of general practice : the journal of the Royal College of General Practitioners.

Risk factors for SARS-CoV-2 among patients in the Oxford Royal College of General Practitioners Research and Surveillance Centre primary care network: a cross-sectional study

Joanna Ellis, Oluwafunmi Akinyemi, Mark Joy, 2020, The Lancet Infectious Diseases.

Ontology to identify pregnant women in electronic health records: primary care sentinel network database study

Harshana Liyanage, Simon de Lusignan, Rachel Byford, 2019, BMJ Health & Care Informatics.

Over‐use of thyroid testing in Canadian and UK primary care in frequent attenders: A cross‐sectional study

Noah H. Crampton, S. de Lusignan, A. Singer, 2021, International journal of clinical practice.

Emergence of a Novel Coronavirus (COVID-19): Protocol for Extending Surveillance Used by the Royal College of General Practitioners Research and Surveillance Centre and Public Health England

Joanna Ellis, Harshana Liyanage, Oluwafunmi Akinyemi, 2020, JMIR public health and surveillance.

Influenza and Respiratory Virus Surveillance, Vaccine Uptake, and Effectiveness at a Time of Cocirculating COVID-19: Protocol for the English Primary Care Sentinel System for 2020-2021 (Preprint)

S. de Lusignan, Gillian E. Smith, H. Liyanage, 2020 .

A lack of a comparator group makes it hard to be sure whether computerised medical record system implementation achieved a better or worse outcome

S. de Lusignan, John Williams, W. Hinton, 2016, BMJ Health & Care Informatics.

Consultations for clinical features of possible cancer and associated urgent referrals before and during the COVID-19 pandemic: an observational cohort study from English primary care

S. de Lusignan, R. Perera, H. Liyanage, 2021, British Journal of Cancer.

Trends in direct oral anticoagulant (DOAC) prescribing in English primary care (2014–2019)

S. de Lusignan, John Williams, D. Kar, 2022, Heart.

The impact of primary care supported shielding on the risk of mortality in people vulnerable to COVID-19: English sentinel network matched cohort study

S. de Lusignan, H. Liyanage, D. McGagh, 2020, Journal of Infection.

Representativeness, Vaccination Uptake, and COVID-19 Clinical Outcomes 2020-2021 in the UK Oxford-Royal College of General Practitioners Research and Surveillance Network: Cohort Profile Summary

William H. Elson, S. de Lusignan, D. Todkill, 2022, JMIR public health and surveillance.

Adverse events following first and second dose COVID-19 vaccination in England, October 2020 to September 2021: a national vaccine surveillance platform self-controlled case series study

R. Byford, John Williams, D. O’Reilly, 2023, Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin.

COVID-19 Surveillance in a Primary Care Sentinel Network: In-Pandemic Development of an Application Ontology

Oscar Tamburis, Harshana Liyanage, John Williams, 2020, JMIR Public Health and Surveillance.

Disparities in the excess risk of mortality in the first wave of COVID-19: Cross sectional study of the English sentinel network

S. de Lusignan, H. Liyanage, D. McGagh, 2020, Journal of Infection.

COVID-19 Surveillance in a Primary Care Sentinel Network: In-Pandemic Development of an Application Ontology

J. Pell, S. de Lusignan, T. Fahey, 2020, JMIR public health and surveillance.

Sociodemographic disparities in COVID-19 seroprevalence across England in the Oxford RCGP primary care sentinel network

R. Byford, Cecilia Okusi, J. Sherlock, 2022, Journal of Infection.

PRINCIPLE trial demonstrates scope for in-pandemic improvement in primary care antibiotic stewardship: a retrospective sentinel network cohort study

S. de Lusignan, J. Sherlock, Manasa Tripathy, 2021, medRxiv.

Association Between Blood Pressure Control and Coronavirus Disease 2019 Outcomes in 45 418 Symptomatic Patients With Hypertension

S. de Lusignan, H. Liyanage, D. McGagh, 2020, Hypertension.

National rates and disparities in childhood vaccination and vaccine-preventable disease during the COVID-19 pandemic: English sentinel network retrospective database study

S. de Lusignan, J. Sherlock, John Williams, 2022, Archives of Disease in Childhood.

Pfizer-BioNTech and Oxford AstraZeneca COVID-19 vaccine effectiveness and immune response amongst individuals in clinical risk groups

S. de Lusignan, R. Byford, J. Sherlock, 2022, Journal of Infection.

Investigating the uptake, effectiveness and safety of COVID-19 vaccines: protocol for an observational study using linked UK national data

Colin Simpson, S. de Lusignan, G. Davies, 2022, BMJ Open.

An ontological approach to identifying cases of chronic kidney disease from routine primary care data: a cross-sectional study

Harshana Liyanage, Simon de Lusignan, Rachel Byford, 2018, BMC Nephrology.

Fenofibrate as a COVID-19 modifying drug: Laboratory success versus real-world reality

S. de Lusignan, John Williams, W. Hinton, 2021, Atherosclerosis.

Influenza and Respiratory Virus Surveillance, Vaccine Uptake, and Effectiveness at a Time of Cocirculating COVID-19: Protocol for the English Primary Care Sentinel System for 2020-2021

S. de Lusignan, H. Liyanage, D. McGagh, 2020, JMIR public health and surveillance.

COVID-19 Surveillance in a Primary Care Sentinel Network: In-Pandemic Development of an Application Ontology (Preprint)

S. de Lusignan, T. Fahey, T. Greenhalgh, 2020 .

Barriers and Facilitators to the Initiation of Injectable Therapies for Type 2 Diabetes Mellitus: A Mixed Methods Study

S. de Lusignan, Manasa Tripathy, F. Ferreira, 2022, Diabetes Therapy.

Trends in end digit preference for blood pressure and associations with cardiovascular outcomes in Canadian and UK primary care: a retrospective observational study

S. de Lusignan, M. Dawes, John Williams, 2019, BMJ Open.

Management of cardiovascular risk factors in people with diabetes in primary care: cross-sectional study.

Tom Chan, Simon de Lusignan, Azeem Majeed, 2006, Public health.

The Oxford Royal College of General Practitioners Clinical Informatics Digital Hub: Protocol to Develop Extended COVID-19 Surveillance and Trial Platforms (Preprint)

Alex J. Elliot, Harshana Liyanage, Chris Bates, 2020 .

The Oxford Royal College of General Practitioners Clinical Informatics Digital Hub: Protocol to Develop Extended COVID-19 Surveillance and Trial Platforms

Harshana Liyanage, Oluwafunmi Akinyemi, Mark Joy, 2020, JMIR public health and surveillance.

Emergence of a Novel Coronavirus (COVID-19): Protocol for Extending Surveillance Used by the Royal College of General Practitioners Research and Surveillance Centre and Public Health England

S. de Lusignan, A. Charlett, H. Liyanage, 2020, JMIR public health and surveillance.

To monitor the COVID-19 pandemic we need better quality primary care data

Simon de Lusignan, John Williams, S. de Lusignan, 2020, BJGP open.

Using Primary Care Data to Report Real-World Pancreatic Cancer Survival and Symptomatology

Simon de Lusignan, Harshana Liyanage, Piers Gatenby, 2021, MIE.

Thrombocytopenic, thromboembolic and haemorrhagic events following second dose with BNT162b2 and ChAdOx1: self-controlled case series analysis of the English national sentinel cohort.

S. de Lusignan, R. Byford, John Williams, 2023, The Lancet regional health. Europe.

Study into COVID-19 Crisis Using Primary Care Mental Health Consultations and Prescriptions Data

S. Harcourt, H. Liyanage, J. Sherlock, 2021, MIE.

COVID-19 vaccine effectiveness against hospitalisation and death of people in clinical risk groups during the Delta variant period: English primary care network cohort study.

William H. Elson, R. Byford, Cecilia Okusi, 2023, The Journal of infection.

British Journal of General Practice Development and validation of a modified Cambridge Multimorbidity Score for use with internationally recognized electronic health record clinical terms (SNOMED CT)

J. Sherlock, John Williams, S. Lusignan, 2023 .

Influenza and Respiratory Virus Surveillance, Vaccine Uptake, and Effectiveness at a Time of Cocirculating COVID-19: Protocol for the English Primary Care Sentinel System for 2020-2021 (Preprint)

S. de Lusignan, H. Liyanage, D. McGagh, 2020 .

Sociodemographic and Health Factors Affecting Uptake of Second Dose Covid-19 Vaccine in England: Retrospective Cohort Study Using Data from the National Primary Care Sentinel Surveillance Network (Oxford-Royal College of General Practitioners Clinical Informatics Digital Hub)

S. de Lusignan, R. Byford, John Williams, 2022, SSRN Electronic Journal.