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Robert Challen
Robert Challen
Verified email at bristol.ac.uk
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Risk of mortality in patients infected with SARS-CoV-2 variant of concern 202012/1: matched cohort study
R Challen, E Brooks-Pollock, JM Read, L Dyson, K Tsaneva-Atanasova, ...
bmj 372, 2021
9112021
Artificial intelligence, bias and clinical safety
R Challen, J Denny, M Pitt, L Gompels, T Edwards, K Tsaneva-Atanasova
BMJ quality & safety 28 (3), 231-237, 2019
8072019
Severity of Omicron (B. 1.1. 529) and Delta (B. 1.617. 2) SARS-CoV-2 infection among hospitalised adults: a prospective cohort study in Bristol, United Kingdom
C Hyams, R Challen, R Marlow, J Nguyen, E Begier, J Southern, J King, ...
The Lancet Regional Health–Europe 25, 2023
1342023
Early epidemiological signatures of novel SARS-CoV-2 variants: establishment of B. 1.617. 2 in England
R Challen, L Dyson, CE Overton, LM Guzman-Rincon, EM Hill, HB Stage, ...
MedRxiv, 2021.06. 05.21258365, 2021
712021
Commentary on the use of the reproduction number R during the COVID-19 pandemic
C Vegvari, S Abbott, F Ball, E Brooks-Pollock, R Challen, BS Collyer, ...
Statistical Methods in Medical Research 31 (9), 1675-1685, 2022
392022
A flexible method for optimising sharing of healthcare resources and demand in the context of the COVID-19 pandemic
L Lacasa, R Challen, E Brooks-Pollock, L Danon
Plos one 15 (10), e0241027, 2020
392020
Meta-analysis of the severe acute respiratory syndrome coronavirus 2 serial intervals and the impact of parameter uncertainty on the coronavirus disease 2019 reproduction number
R Challen, E Brooks-Pollock, K Tsaneva-Atanasova, L Danon
Statistical Methods in Medical Research 31 (9), 1686-1703, 2022
33*2022
Incidence of community acquired lower respiratory tract disease in Bristol, UK during the COVID-19 pandemic: A prospective cohort study
C Hyams, R Challen, E Begier, J Southern, J King, A Morley, ...
The Lancet Regional Health–Europe 21, 2022
222022
Effectiveness of BNT162b2 COVID-19 vaccination in prevention of hospitalisations and severe disease in adults with SARS-CoV-2 Delta (B. 1.617. 2) and Omicron (B. 1.1. 529 …
A Chatzilena, C Hyams, R Challen, R Marlow, J King, D Adegbite, ...
The Lancet Regional Health–Europe 25, 2023
212023
Short-term projections based on early Omicron variant dynamics in England
MJ Keeling, E Brooks-Pollock, R Challen, L Danon, L Dyson, JR Gog, ...
MedRxiv, 2021.12. 30.21268307, 2021
182021
Estimates of regional infectivity of COVID-19 in the United Kingdom following imposition of social distancing measures
R Challen, K Tsaneva-Atanasova, M Pitt, T Edwards, L Gompels, ...
Philosophical Transactions of the Royal Society B 376 (1829), 20200280, 2021
162021
Serotype Distribution and Disease Severity in Adults Hospitalized with Streptococcus pneumoniae Infection, Bristol and Bath, UK, 2006‒2022
C Hyams, R Challen, D Hettle, Z Amin-Chowdhury, C Grimes, G Ruffino, ...
Emerging Infectious Diseases 29 (10), 1953, 2023
142023
Relative vaccine effectiveness (rVE) of mRNA COVID-19 boosters in the UK vaccination programme, during the Spring-Summer (monovalent vaccine) and Autumn-Winter 2022 (bivalent …
A Chatzilena, C Hyams, R Challen, R Marlow, J King, D Adegbite, ...
medRxiv, 2023.03. 16.23287360, 2023
122023
Impact of SARS-CoV-2 infective exacerbation of chronic obstructive pulmonary disease on clinical outcomes in a prospective cohort study of hospitalised adults
C Hyams, G Qian, G Nava, R Challen, E Begier, J Southern, M Lahuerta, ...
Journal of the Royal Society of Medicine 116 (11), 371-385, 2023
72023
Clinical decision-making and algorithmic inequality
R Challen, L Danon
BMJ Quality & Safety 32 (9), 495-497, 2023
52023
Relative vaccine effectiveness of mRNA COVID-19 boosters in people aged at least 75 years during the spring-summer (monovalent vaccine) and autumn-winter (bivalent vaccine …
A Chatzilena, C Hyams, R Challen, R Marlow, J King, D Adegbite, ...
Eurosurveillance 28 (48), 2300173, 2023
42023
Algorithmic hospital catchment area estimation using label propagation
RJ Challen, GJ Griffith, L Lacasa, K Tsaneva-Atanasova
BMC Health Services Research 22 (1), 828, 2022
32022
Factors influencing digital review of pathology test results in an inpatient setting: a cross-sectional study
R Challen, K Tsaneva-Atanasova, T Edwards, L Gompels, M Dayer, M Pitt, ...
JAMIA open 3 (2), 290-298, 2020
32020
Safety and effectiveness of SGLT2 inhibitors in a UK population with type 2 diabetes and aged over 70 years: an instrumental variable approach
LM Güdemann, KG Young, NJM Thomas, R Hopkins, R Challen, ...
Diabetologia, 1-11, 2024
22024
Risk factor associations for severe COVID-19, influenza and pneumonia in people with diabetes to inform future pandemic preparations: UK population-based cohort study
R Hopkins, KG Young, NJ Thomas, J Godwin, D Raja, BA Mateen, ...
BMJ open 14 (1), e078135, 2024
22024
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