Alexis Llewellyn

5.4k total citations · 4 hit papers
45 papers, 3.5k citations indexed

About

Alexis Llewellyn is a scholar working on Epidemiology, Infectious Diseases and Surgery. According to data from OpenAlex, Alexis Llewellyn has authored 45 papers receiving a total of 3.5k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Epidemiology, 8 papers in Infectious Diseases and 7 papers in Surgery. Recurrent topics in Alexis Llewellyn's work include Retinal Diseases and Treatments (4 papers), Retinal Imaging and Analysis (4 papers) and Obesity, Physical Activity, Diet (4 papers). Alexis Llewellyn is often cited by papers focused on Retinal Diseases and Treatments (4 papers), Retinal Imaging and Analysis (4 papers) and Obesity, Physical Activity, Diet (4 papers). Alexis Llewellyn collaborates with scholars based in United Kingdom, United States and Australia. Alexis Llewellyn's co-authors include Mark Simmonds, Nerys Woolacott, Christopher G. Owen, Nick Meader, Thirimon Moe‐Byrne, Gill Norman, Melissa Harden, Gavin Stewart, Julian P. T. Higgins and Amanda Sowden and has published in prestigious journals such as PLoS ONE, Cochrane Database of Systematic Reviews and Journal of Neurology Neurosurgery & Psychiatry.

In The Last Decade

Alexis Llewellyn

44 papers receiving 3.5k citations

Hit Papers

Predicting adult obesity ... 2014 2026 2018 2022 2015 2015 2014 2015 400 800 1.2k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Predicting adult obesity from childhood obesity: a systematic review and meta‐analysis
    2015 1.3k citations Mark Simmonds, Alexis Llewellyn et al. profile →
  2. Childhood obesity as a predictor of morbidity in adulthood: a systematic review and meta‐analysis
    2015 556 citations Alexis Llewellyn, Mark Simmonds et al. profile →
  3. A checklist designed to aid consistency and reproducibility of GRADE assessments: development and pilot validation
    2014 440 citations Nick Meader, Alexis Llewellyn et al. Systematic Reviews profile →
  4. The use of measures of obesity in childhood for predicting obesity and the development of obesity-related diseases in adulthood: a systematic review and meta-analysis
    2015 278 citations Mark Simmonds, Alexis Llewellyn et al. Health Technology Assessment profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Alexis Llewellyn United Kingdom 17 1.6k 636 606 576 484 45 3.5k
Sarah Messiah United States 29 1.4k 0.9× 731 1.1× 287 0.5× 508 0.9× 353 0.7× 265 3.3k
Lisa K. Micklesfield South Africa 28 1.4k 0.9× 461 0.7× 667 1.1× 1.0k 1.8× 427 0.9× 173 3.7k
Celia Álvarez‐Bueno Spain 40 1.6k 1.0× 619 1.0× 497 0.8× 906 1.6× 352 0.7× 178 5.1k
Jenny Freeman United Kingdom 20 2.0k 1.2× 483 0.8× 1.4k 2.3× 893 1.6× 318 0.7× 41 5.3k
Jonathon L. Maguire Canada 31 1.0k 0.6× 453 0.7× 698 1.2× 411 0.7× 501 1.0× 215 3.9k
Catherine S. Birken Canada 27 1.4k 0.8× 463 0.7× 560 0.9× 517 0.9× 254 0.5× 177 2.8k
Remy A. Hirasing Netherlands 34 1.9k 1.2× 635 1.0× 678 1.1× 614 1.1× 376 0.8× 110 4.7k
Erik Lehman United States 39 1.2k 0.7× 808 1.3× 454 0.7× 1.5k 2.7× 491 1.0× 269 5.7k
Marjorie A. Bowman United States 32 1.0k 0.6× 1.3k 2.0× 298 0.5× 329 0.6× 368 0.8× 160 4.9k
Mandy Vogel Germany 30 931 0.6× 325 0.5× 593 1.0× 473 0.8× 466 1.0× 182 3.5k

Countries citing papers authored by Alexis Llewellyn

Since Specialization
Citations

This map shows the geographic impact of Alexis Llewellyn's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Alexis Llewellyn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Alexis Llewellyn more than expected).

Fields of papers citing papers by Alexis Llewellyn

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Alexis Llewellyn. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Alexis Llewellyn. The network helps show where Alexis Llewellyn may publish in the future.

Co-authorship network of co-authors of Alexis Llewellyn

This figure shows the co-authorship network connecting the top 25 collaborators of Alexis Llewellyn. A scholar is included among the top collaborators of Alexis Llewellyn based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Alexis Llewellyn. Alexis Llewellyn is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Swords, Chloe, Matthew E. Smith, Anant Patel, et al.. (2025). Balloon dilatation of the Eustachian tube for obstructive Eustachian tube dysfunction in adults. Cochrane Database of Systematic Reviews. 2025(2). CD013429–CD013429.
2.
3.
Llewellyn, Alexis, Marta Soares, Melissa Harden, et al.. (2024). MRI software and cognitive fusion biopsies in people with suspected prostate cancer: a systematic review, network meta-analysis and cost-effectiveness analysis. Health Technology Assessment. 28(61). 1–310. 3 indexed citations
4.
Simmonds, Mark, Alexis Llewellyn, Ruth Walker, et al.. (2024). Anti-VEGF drugs compared with laser photocoagulation for the treatment of diabetic retinopathy: a systematic review and meta-analysis. Health Technology Assessment. 29(23). 1–71. 6 indexed citations
5.
Walton, Matthew, Laura Bojke, Mark Simmonds, et al.. (2024). Anti–Vascular Endothelial Growth Factor Drugs Compared With Panretinal Photocoagulation for the Treatment of Proliferative Diabetic Retinopathy: A Cost-Effectiveness Analysis. Value in Health. 27(7). 907–917. 4 indexed citations
6.
Duarte, Ana, Alexis Llewellyn, Ruth Walker, et al.. (2021). Non-invasive imaging software to assess the functional significance of coronary stenoses: a systematic review and economic evaluation. Health Technology Assessment. 25(56). 1–230. 4 indexed citations
7.
Duarte, Ana, Simon Walker, Sofia Dias, et al.. (2021). Cost-effectiveness of point-of-care creatinine testing to assess kidney function prior to contrast-enhanced computed tomography imaging. European Journal of Radiology. 142. 109872–109872. 3 indexed citations
8.
Llewellyn, Alexis, et al.. (2019). Imaging tests for the detection of osteomyelitis: a systematic review. Health Technology Assessment. 23(61). 1–128. 43 indexed citations
9.
Yang, Huiqin, Alexis Llewellyn, Ruth Walker, et al.. (2019). High-throughput, non-invasive prenatal testing for fetal rhesus D status in RhD-negative women: a systematic review and meta-analysis. BMC Medicine. 17(1). 37–37. 28 indexed citations
10.
Saramago, Pedro, Huiqin Yang, Alexis Llewellyn, et al.. (2018). High-throughput non-invasive prenatal testing for fetal rhesus D status in RhD-negative women not known to be sensitised to the RhD antigen: a systematic review and economic evaluation. Health Technology Assessment. 22(13). 1–172. 18 indexed citations
11.
Tiffin, Paul A., et al.. (2018). Defining professionalism for mental health services: a rapid systematic review. Journal of Mental Health. 28(5). 546–565. 12 indexed citations
12.
Wade, Ros, Alexis Llewellyn, Julie Jones-Diette, et al.. (2018). Interventional management of hyperhidrosis in secondary care: a systematic review. British Journal of Dermatology. 179(3). 599–608. 20 indexed citations
13.
Stewart, Lesley, Mark Simmonds, Lelia Duley, et al.. (2017). Evaluating progestogens for prevention of preterm birth international collaborative (EPPPIC) individual participant data (IPD) meta-analysis: protocol. Systematic Reviews. 6(1). 235–235. 8 indexed citations
14.
Wade, Ros, Stephen Rice, Alexis Llewellyn, et al.. (2017). Interventions for hyperhidrosis in secondary care: a systematic review and value-of-information analysis. Health Technology Assessment. 21(80). 1–280. 11 indexed citations
15.
Lomas, James, Alexis Llewellyn, Marta Soares, et al.. (2016). The Clinical and Cost Effectiveness of Vortioxetine for the Treatment of a Major Depressive Episode in Patients With Failed Prior Antidepressant Therapy: A Critique of the Evidence. PharmacoEconomics. 34(9). 901–912. 9 indexed citations
16.
Llewellyn, Alexis, Mark Simmonds, William L. Irving, Ginny Brunton, & Amanda Sowden. (2016). Antiretroviral therapy and liver disease progression in HIV and hepatitis C co-infected patients: a systematic review and meta-analysis. PubMed. 1(1). 10–10. 4 indexed citations
17.
Sutcliffe, Katy, Rebecca Rees, Gillian Stokes, et al.. (2015). Depression, anxiety, pain and quality of life in people living with chronic hepatitis C: A systematic review and meta-analysis. 8 indexed citations
18.
Meader, Nick, Alexis Llewellyn, Gill Norman, et al.. (2014). A checklist designed to aid consistency and reproducibility of GRADE assessments: development and pilot validation. Systematic Reviews. 3(1). 82–82. 440 indexed citations breakdown →
19.
Meader, Nick, Thirimon Moe‐Byrne, Alexis Llewellyn, & Alex J. Mitchell. (2013). Screening for poststroke major depression: a meta-analysis of diagnostic validity studies. Journal of Neurology Neurosurgery & Psychiatry. 85(2). 198–206. 152 indexed citations
20.
O’Mara-Eves, Alison, et al.. (2012). Curriculum and curriculum access issues for students with special educational needs in post-primary settings: An international Review. IOE EPrints. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Sarah Messiah Breakdown of academic impact, for papers by Lisa K. Micklesfield Breakdown of academic impact, for papers by Celia Álvarez‐Bueno Breakdown of academic impact, for papers by Jenny Freeman Breakdown of academic impact, for papers by Jonathon L. Maguire Breakdown of academic impact, for papers by Catherine S. Birken Breakdown of academic impact, for papers by Remy A. Hirasing Breakdown of academic impact, for papers by Erik Lehman Breakdown of academic impact, for papers by Marjorie A. Bowman Breakdown of academic impact, for papers by Mandy Vogel
Rankless by CCL
2026