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U. Agrawal · SciRah

Researcher profile · Semantic Scholar

U. Agrawal

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U. Agrawal — researcher profile on SciRah

h-index: 22
Works: 75
Citations: 2,503

Most-cited papers

Interim findings from first-dose mass COVID-19 vaccination roll-out and COVID-19 hospital admissions in Scotland: a national prospective cohort study
E. Vasileiou, Colin Simpson, T. Shi, S. Kerr +28 more
2021The Lancet480 citations Open access
Semantic Scholar
SARS-CoV-2 infection and COVID-19 vaccination rates in pregnant women in Scotland
S. Stock, J. Carruthers, C. Calvert, C. Denny +18 more
2022Nature Medicine257 citations Open access
Semantic Scholar
Severe COVID-19 outcomes after full vaccination of primary schedule and initial boosters: pooled analysis of national prospective cohort studies of 30 million individuals in England, Northern Ireland, Scotland, and Wales
U. Agrawal, S. Bedston, C. McCowan, J. Oke +23 more
2022The Lancet162 citations Open access
Semantic Scholar
Severity of omicron variant of concern and effectiveness of vaccine boosters against symptomatic disease in Scotland (EAVE II): a national cohort study with nested test-negative design
Aziz Sheikh, S. Kerr, M. Woolhouse, J. McMenamin +12 more
2022Lancet. Infectious Diseases (Print)149 citations Open access
Semantic Scholar
COVID-19 hospital admissions and deaths after BNT162b2 and ChAdOx1 nCoV-19 vaccinations in 2·57 million people in Scotland (EAVE II): a prospective cohort study
U. Agrawal, S. Katikireddi, C. McCowan, R. Mulholland +27 more
2021The Lancet Respiratory Medicine126 citations Open access
Semantic Scholar
Two-dose ChAdOx1 nCoV-19 vaccine protection against COVID-19 hospital admissions and deaths over time: a retrospective, population-based cohort study in Scotland and Brazil
S. Katikireddi, T. Cerqueira-Silva, E. Vasileiou, C. Robertson +20 more
2021The Lancet124 citations Open access
Semantic Scholar
Effectiveness of First Dose of COVID-19 Vaccines Against Hospital Admissions in Scotland: National Prospective Cohort Study of 5.4 Million People
E. Vasileiou, Colin Simpson, C. Robertson, T. Shi +28 more
2021Social Science Research Network106 citations Open access
Semantic Scholar
Impact of COVID-19 on accident and emergency attendances and emergency and planned hospital admissions in Scotland: an interrupted time-series analysis
R. Mulholland, R. Wood, H. Stagg, C. Fischbacher +12 more
2020Journal of the Royal Society of Medicine91 citations Open access
Semantic Scholar
Accelerated waning of the humoral response to COVID-19 vaccines in obesity
A. A. van der Klaauw, E. Horner, Pehuén Pereyra-Gerber, U. Agrawal +42 more
2023Nature Medicine86 citations Open access
Semantic Scholar
Epidemiology of pre-existing multimorbidity in pregnant women in the UK in 2018: a population-based cross-sectional study
Siang-Ing Lee, A. Azcoaga-Lorenzo, U. Agrawal, J. Kennedy +23 more
2022BMC Pregnancy and Childbirth64 citations Open access
Semantic Scholar
Impact of first UK COVID-19 lockdown on hospital admissions: Interrupted time series study of 32 million people
S. A. Shah, S. Brophy, John F. Kennedy, Louis Fisher +14 more
2022EClinicalMedicine62 citations Open access
Semantic Scholar
First dose ChAdOx1 and BNT162b2 COVID-19 vaccinations and cerebral venous sinus thrombosis: A pooled self-controlled case series study of 11.6 million individuals in England, Scotland, and Wales
S. Kerr, M. Joy, F. Torabi, S. Bedston +30 more
2022PLoS Medicine50 citations Open access
Semantic Scholar
Risk of COVID-19 hospital admission among children aged 5–17 years with asthma in Scotland: a national incident cohort study
T. Shi, Jia-Feng Pan, S. Katikireddi, C. McCowan +7 more
2021The Lancet Respiratory Medicine49 citations Open access
Semantic Scholar
Polypharmacy during pregnancy and associated risk factors: a retrospective analysis of 577 medication exposures among 1.5 million pregnancies in the UK, 2000-2019
A. Subramanian, A. Azcoaga-Lorenzo, Astha Anand, Katherine Phillips +25 more
2023BMC Medicine48 citations Open access
Semantic Scholar
Informing the public health response to COVID-19: a systematic review of risk factors for disease, severity, and mortality
M. Flook, C. Jackson, E. Vasileiou, Colin Simpson +12 more
2021BMC Infectious Diseases47 citations Open access
Semantic Scholar
Vaccine effectiveness of two-dose BNT162b2 against symptomatic and severe COVID-19 among adolescents in Brazil and Scotland over time: a test-negative case-control study
P. Florentino, T. Millington, T. Cerqueira-Silva, C. Robertson +19 more
2022Lancet. Infectious Diseases (Print)43 citations Open access
Semantic Scholar
Association between multimorbidity and mortality in a cohort of patients admitted to hospital with COVID-19 in Scotland
U. Agrawal, A. Azcoaga-Lorenzo, A. Fagbamigbe, E. Vasileiou +11 more
2021Journal of the Royal Society of Medicine43 citations Open access
Semantic Scholar
Cohort profile: Early pandemic evaluation and enhanced surveillance of COVID-19 (EAVE II) database
R. Mulholland, E. Vasileiou, Colin Simpson, C. Robertson +10 more
2021International Journal of Epidemiology43 citations Open access
Semantic Scholar
Uptake of infant and preschool immunisations in Scotland and England during the COVID-19 pandemic: An observational study of routinely collected data
Fiona McQuaid, R. Mulholland, Yuma Sangpang Rai, U. Agrawal +13 more
2021medRxiv30 citations Open access
Semantic Scholar
Characteristics and risk of COVID-19-related death in fully vaccinated people in Scotland
Zoë L. Grange, Audrey Buelo, C. Sullivan, E. Moore +8 more
2021The Lancet27 citations Open access
Semantic Scholar
Risk of thrombocytopenic, haemorrhagic and thromboembolic disorders following COVID-19 vaccination and positive test: a self-controlled case series analysis in Wales
F. Torabi, S. Bedston, E. Lowthian, A. Akbari +26 more
2022Scientific Reports23 citations Open access
Semantic Scholar
Suprailiac versus transiliac approach in transforaminal endoscopic discectomy at L5-S1: a new surgical classification of L5-iliac crest relationship and guidelines for approach.
P. Patgaonkar, Girish Datar, U. Agrawal, C. Palanikumar +3 more
2020Journal of Spine Surgery23 citations Open access
Semantic Scholar
Effect on life expectancy of temporal sequence in a multimorbidity cluster of psychosis, diabetes, and congestive heart failure among 1·7 million individuals in Wales with 20-year follow-up: a retrospective cohort study using linked data.
Rhiannon K. Owen, J. Lyons, A. Akbari, B. Guthrie +15 more
2023Lancet Public Health22 citations Open access
Semantic Scholar
Protocol for the development of the Wales Multimorbidity e-Cohort (WMC): data sources and methods to construct a population-based research platform to investigate multimorbidity
J. Lyons, A. Akbari, U. Agrawal, G. Harper +25 more
2021BMJ Open22 citations Open access
Semantic Scholar
Prevalence of polypharmacy in pregnancy: a systematic review
Astha Anand, Katherine Phillips, A. Subramanian, Siang-Ing Lee +10 more
2023BMJ Open20 citations Open access
Semantic Scholar
Risk of severe COVID-19 outcomes after autumn 2022 COVID-19 booster vaccinations: a pooled analysis of national prospective cohort studies involving 7.4 million adults in England, Northern Ireland, Scotland and Wales
S. Bedston, Fatima Almaghrabi, Lynsey Patterson, U. Agrawal +18 more
2023The Lancet Regional Health - Europe20 citations Open access
Semantic Scholar
External validation of the QCovid risk prediction algorithm for risk of COVID-19 hospitalisation and mortality in adults: national validation cohort study in Scotland
Colin Simpson, C. Robertson, S. Kerr, T. Shi +11 more
2021Thorax19 citations Open access
Semantic Scholar
Temporal trends and forecasting of COVID-19 hospitalisations and deaths in Scotland using a national real-time patient-level data platform: a statistical modelling study
Colin Simpson, C. Robertson, E. Vasileiou, E. Moore +9 more
2021The Lancet Digital Health19 citations Open access
Semantic Scholar
COVID-19 in Pregnancy in Scotland (COPS): protocol for an observational study using linked Scottish national data
S. Stock, D. McAllister, E. Vasileiou, Colin Simpson +9 more
2020BMJ Open19 citations Open access
Semantic Scholar
Uptake of COVID-19 vaccinations amongst 3,433,483 children and young people: meta-analysis of UK prospective cohorts
S. Aldridge, U. Agrawal, S. Murphy, T. Millington +16 more
2024Nature Communications18 citations Open access
Semantic Scholar
Cohort Profile: The COVID-19 in Pregnancy in Scotland (COPS) dynamic cohort of pregnant women to assess effects of viral and vaccine exposures on pregnancy
S. Stock, J. Carruthers, C. Denny, J. Donaghy +15 more
2022International Journal of Epidemiology17 citations Open access
Semantic Scholar
Maternal multimorbidity and preterm birth in Scotland: an observational record-linkage study
A. Azcoaga-Lorenzo, A. Fagbamigbe, U. Agrawal, Mairead Black +10 more
2023BMC Medicine15 citations Open access
Semantic Scholar
BNT162b2 COVID-19 vaccination uptake, safety, effectiveness and waning in children and young people aged 12–17 years in Scotland
I. Rudan, T. Millington, K. Antal, Zoë L. Grange +20 more
2022The Lancet Regional Health - Europe15 citations Open access
Semantic Scholar
Author Correction: SARS-CoV-2 infection and COVID-19 vaccination rates in pregnant women in Scotland
S. Stock, J. Carruthers, C. Calvert, C. Denny +18 more
2022Nature Medicine13 citations Open access
Semantic Scholar
Risk of COVID-19 death in adults who received booster COVID-19 vaccinations in England
I. Ward, C. Robertson, U. Agrawal, Lynsey Patterson +6 more
2024Nature Communications12 citations Open access
Semantic Scholar
Risk of COVID-19 hospitalizations among school-aged children in Scotland: A national incident cohort study
T. Shi, Jia-Feng Pan, E. Moore, S. Katikireddi +10 more
2022Journal of Global Health12 citations Open access
Semantic Scholar
Thrombocytopenic, thromboembolic and haemorrhagic events following second dose with BNT162b2 and ChAdOx1: self-controlled case series analysis of the English national sentinel cohort
M. Joy, U. Agrawal, Xue-Juan Fan, C. Robertson +12 more
2023The Lancet Regional Health - Europe10 citations Open access
Semantic Scholar
Investigating the uptake, effectiveness and safety of COVID-19 vaccines: protocol for an observational study using linked UK national data
E. Vasileiou, T. Shi, S. Kerr, C. Robertson +34 more
2022BMJ Open10 citations Open access
Semantic Scholar
Protocol for the development of a core outcome set for studies of pregnant women with pre-existing multimorbidity
Siang-Ing Lee, K. Eastwood, N. Moss, A. Azcoaga-Lorenzo +18 more
2021BMJ Open10 citations Open access
Semantic Scholar
Ethnic and social inequalities in COVID-19 outcomes in Scotland: protocol for early pandemic evaluation and enhanced surveillance of COVID-19 (EAVE II)
P. Henery, E. Vasileiou, Kirsten J. Hainey, D. Buchanan +16 more
2021BMJ Open9 citations Open access
Semantic Scholar
Epidemiology of pre-existing multimorbidity in pregnant women in the UK in 2018: a cross-sectional study
Siang-Ing Lee, A. Azcoaga-Lorenzo, U. Agrawal, J. Kennedy +23 more
2021The Lancet8 citations Open access
Semantic Scholar
Prevalence and patterns of pre-existing multimorbidity in pregnancy in Northern Ireland: a population-based, retrospective study using linked routinely collected healthcare data
Lisa Kent, Siang-Ing Lee, Megha Singh, S. Wambua +15 more
2025BMC Pregnancy and Childbirth7 citations Open access
Semantic Scholar
The impact of the management strategies for patients with subclinical hypothyroidism on long-term clinical outcomes: An umbrella review
Brenda S Bauer, A. Azcoaga-Lorenzo, U. Agrawal, A. Fagbamigbe +1 more
2022PLoS ONE7 citations Open access
Semantic Scholar
Clustering long-term health conditions among 67728 people with multimorbidity using electronic health records in Scotland
A. Fagbamigbe, U. Agrawal, A. Azcoaga-Lorenzo, Briana MacKerron +20 more
2023PLoS ONE6 citations Open access
Semantic Scholar
Maternal and child outcomes for pregnant women with pre-existing multiple long-term conditions: protocol for an observational study in the UK
Siang-Ing Lee, H. Hope, D. O'Reilly, Lisa Kent +25 more
2023BMJ Open6 citations Open access
Semantic Scholar
Using Electronic Medical Records to Identify Potentially Eligible Study Subjects for Lung Cancer Screening with Biomarkers
Lamorna Brown, U. Agrawal, F. Sullivan
2021Cancers6 citations Open access
Semantic Scholar
Study of Variation and Latency of Wave V of Brain Stem Evoked Response Audiometry in North Central India
Vishwambhar Singh, U. Agrawal, Ashvanee Chaudhary, M. Ranjan
2018Indian Journal of Otolaryngology and Head & Neck Surgery6 citations Open access
Semantic Scholar
Adverse events after first and second doses of COVID-19 vaccination in England: a national vaccine surveillance platform self-controlled case series study
Ruby S. M. Tsang, U. Agrawal, M. Joy, R. Byford +18 more
2023Journal of the Royal Society of Medicine5 citations Open access
Semantic Scholar
Accelerated waning of the humoral response to SARS-CoV-2 vaccines in obesity
A. A. van der Klaauw, E. Horner, P. Pereyra-Gerber, U. Agrawal +36 more
2022medRxiv5 citations Open access
Semantic Scholar
Radiomic analysis in contrast-enhanced mammography using a multivendor data set: accuracy of models according to segmentation techniques
S. Savaridas, U. Agrawal, A. Fagbamigbe, S. Tennant +1 more
2023British Journal of Radiology4 citations Open access
Semantic Scholar

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C. McCowan — researcher profile on SciRah
Colin Simpson×26
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Colin Simpson — researcher profile on SciRah
Aziz Sheikh×25
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C. Robertson×21
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C. Robertson — researcher profile on SciRah

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E. Vasileiou — researcher profile on SciRah

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L. Ritchie — researcher profile on SciRah

A. Azcoaga-Lorenzo×16

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T. Shi — researcher profile on SciRah

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S. Katikireddi — researcher profile on SciRah

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S. Kerr — researcher profile on SciRah