| 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 | 910 | 2021 |
| 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 | 800 | 2019 |
| 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 | 133 | 2023 |
| 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 | 71 | 2021 |
| 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 | 39 | 2020 |
| 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 | 38 | 2022 |
| 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 | 22 | 2022 |
| 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 | 21 | 2023 |
| 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 | 18 | 2021 |
| 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 | 16 | 2021 |
| 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 | 12 | 2023 |
| 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 | 12 | 2023 |
| 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 | 7 | 2023 |
| Clinical decision-making and algorithmic inequality R Challen, L Danon BMJ Quality & Safety 32 (9), 495-497, 2023 | 5 | 2023 |
| 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 | 3 | 2023 |
| 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 | 3 | 2022 |
| 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 | 3 | 2020 |
| 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 | 2 | 2024 |
| 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 | 2 | 2024 |
Leon DanonAssociate Professor, University of BrisolVerified email at bristol.ac.uk
