Ronan Ryan

2.7k total citations · 1 hit paper
48 papers, 1.8k citations indexed

About

Ronan Ryan is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Epidemiology. According to data from OpenAlex, Ronan Ryan has authored 48 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Cardiology and Cardiovascular Medicine, 11 papers in Surgery and 9 papers in Epidemiology. Recurrent topics in Ronan Ryan's work include Health Systems, Economic Evaluations, Quality of Life (7 papers), Health Promotion and Cardiovascular Prevention (7 papers) and Venous Thromboembolism Diagnosis and Management (6 papers). Ronan Ryan is often cited by papers focused on Health Systems, Economic Evaluations, Quality of Life (7 papers), Health Promotion and Cardiovascular Prevention (7 papers) and Venous Thromboembolism Diagnosis and Management (6 papers). Ronan Ryan collaborates with scholars based in United Kingdom, United States and Canada. Ronan Ryan's co-authors include Tom Marshall, Linda Nichols, Elizabeth Teale, John Young, John Parry, Andrew Clegg, Chris Bates, Mohammed A. Mohammed, Krishnarajah Nirantharakumar and Nicola J. Adderley and has published in prestigious journals such as The Journal of Clinical Endocrinology & Metabolism, Stroke and British Journal of Cancer.

In The Last Decade

Ronan Ryan

48 papers receiving 1.8k citations

Hit Papers

align trajectories

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.

Development and validation of an electronic frailty index using routine primary care electronic health record data

2016 876 citations Andrew Clegg, Chris Bates et al. Age and Ageing profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ronan Ryan United Kingdom	19	702	496	480	465	304	48	1.8k
Zhe Tang China	29	921 1.3×	463 0.9×	757 1.6×	372 0.8×	292 1.0×	109	2.1k
Linda Nichols United Kingdom	19	695 1.0×	409 0.8×	594 1.2×	271 0.6×	181 0.6×	57	1.9k
Andrew R. Zullo United States	19	730 1.0×	364 0.7×	329 0.7×	331 0.7×	324 1.1×	176	2.0k
Bert Vaes Belgium	29	624 0.9×	351 0.7×	597 1.2×	724 1.6×	496 1.6×	152	2.6k
Ariela R. Orkaby United States	24	902 1.3×	510 1.0×	562 1.2×	672 1.4×	165 0.5×	120	2.1k
Christine T. Cigolle United States	19	631 0.9×	422 0.9×	342 0.7×	190 0.4×	484 1.6×	41	1.8k
Ken Lee Chin Australia	18	419 0.6×	246 0.5×	368 0.8×	219 0.5×	188 0.6×	40	1.6k
Paweł Lewek Poland	12	635 0.9×	463 0.9×	164 0.3×	417 0.9×	204 0.7×	25	2.5k
Carlos O. Weiss United States	23	561 0.8×	451 0.9×	509 1.1×	175 0.4×	348 1.1×	37	1.8k
Rhonda L. Bohn United States	28	469 0.7×	576 1.2×	205 0.4×	729 1.6×	225 0.7×	83	3.5k

Countries citing papers authored by Ronan Ryan

Since Specialization

Citations

This map shows the geographic impact of Ronan Ryan'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 Ronan Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ronan Ryan more than expected).

Fields of papers citing papers by Ronan Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ronan Ryan. 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 Ronan Ryan. The network helps show where Ronan Ryan may publish in the future.

Co-authorship network of co-authors of Ronan Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of Ronan Ryan. A scholar is included among the top collaborators of Ronan Ryan 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 Ronan Ryan. Ronan Ryan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Parretti, Helen M., Emma Pearce, Malcolm J Price, et al.. (2022). Temporal trends in associations between severe mental illness and risk of cardiovascular disease: A systematic review and meta-analysis. PLoS Medicine. 19(4). e1003960–e1003960. 61 indexed citations

Willis, Brian H, et al.. (2020). Factors predicting statin prescribing for primary prevention: a historical cohort study. British Journal of General Practice. 71(704). e219–e225. 3 indexed citations

Cooper, Jennifer, Ronan Ryan, Nick Parsons, et al.. (2020). The use of electronic healthcare records for colorectal cancer screening referral decisions and risk prediction model development. BMC Gastroenterology. 20(1). 78–78. 10 indexed citations

Davies, Huw, Matthew Popplewell, Gareth Bate, et al.. (2018). Analysis of Effect of National Institute for Health and Care Excellence Clinical Guideline CG168 on Management of Varicose Veins in Primary Care Using the Health Improvement Network Database. European Journal of Vascular and Endovascular Surgery. 56(6). 880–884. 5 indexed citations

Jadhakhan, Ferozkhan, Tom Marshall, Ronan Ryan, & Paramjit Gill. (2018). Risk of chronic kidney disease in young adults with impaired glucose tolerance/impaired fasting glucose: a retrospective cohort study using electronic primary care records. BMC Nephrology. 19(1). 42–42. 14 indexed citations

Marshall, Tom, et al.. (2018). Predictors of human immunodeficiency virus (HIV) infection in primary care among adults living in developed countries: a systematic review. Systematic Reviews. 7(1). 82–82. 13 indexed citations

Adderley, Nicola J., Ronan Ryan, Krishnarajah Nirantharakumar, & Tom Marshall. (2018). Prevalence and treatment of atrial fibrillation in UK general practice from 2000 to 2016. Heart. 105(1). 27–33. 74 indexed citations

Šumilo, Dana, Linda Nichols, Ronan Ryan, & Tom Marshall. (2018). Incidence of indications for tonsillectomy and frequency of evidence-based surgery: a 12-year retrospective cohort study of primary care electronic records. British Journal of General Practice. 69(678). e33–e41. 35 indexed citations

Taylor, Clare, Ronan Ryan, Linda Nichols, et al.. (2017). Survival following a diagnosis of heart failure in primary care. Family Practice. 34(2). cmw145–cmw145. 79 indexed citations

10.

Turner, Grace, Melanie Calvert, Max G. Feltham, et al.. (2016). Under-prescribing of Prevention Drugs and Primary Prevention of Stroke and Transient Ischaemic Attack in UK General Practice: A Retrospective Analysis. PLoS Medicine. 13(11). e1002169–e1002169. 18 indexed citations

11.

Davies, Huw, et al.. (2016). The Impact of 2013 UK National Institute for Health and Care Excellence Clinical Guideline CG168 on Family Physician (General Practitioner) Management of Varicose Veins Based on the Health improvement Network UK Database. Journal of Vascular Surgery Venous and Lymphatic Disorders. 5(1). 167–167. 2 indexed citations

12.

Marshall, Tom, et al.. (2016). Predictors of human immunodeficiency virus (HIV) infection in primary care: a systematic review protocol. Systematic Reviews. 5(1). 158–158. 9 indexed citations

13.

Martín, James, Alan Girling, Krishnarajah Nirantharakumar, et al.. (2016). Intra-cluster and inter-period correlation coefficients for cross-sectional cluster randomised controlled trials for type-2 diabetes in UK primary care. Trials. 17(1). 402–402. 39 indexed citations

14.

Clegg, Andrew, Chris Bates, John Young, et al.. (2016). Development and validation of an electronic frailty index using routine primary care electronic health record data. Age and Ageing. 45(3). 353–360. 876 indexed citations breakdown →

15.

Calvert, Melanie, et al.. (2015). A retrospective cohort study to investigate fatigue, psychological or cognitive impairment after TIA: protocol paper. BMJ Open. 5(4). e008149–e008149. 13 indexed citations

16.

Berkman, Lindy, Dion Morton, George Dowswell, et al.. (2015). Preliminary results of a feasibility study of the use of information technology for identification of suspected colorectal cancer in primary care: the CREDIBLE study. British Journal of Cancer. 112(S1). S70–S76. 13 indexed citations

17.

Lycett, Deborah, Linda Nichols, Ronan Ryan, et al.. (2015). The association between smoking cessation and glycaemic control in patients with type 2 diabetes: a THIN database cohort study. The Lancet Diabetes & Endocrinology. 3(6). 423–430. 64 indexed citations

18.

Reeves, David, David A. Springate, Darren M. Ashcroft, et al.. (2014). Can analyses of electronic patient records be independently and externally validated? The effect of statins on the mortality of patients with ischaemic heart disease: a cohort study with nested case–control analysis. BMJ Open. 4(4). e004952–e004952. 30 indexed citations

19.

Ryan, Ronan, Richard J. McManus, Jonathan Mant, John Macleod, & Richard Hobbs. (2009). Statins in heart failure: Retrospective cohort study using routine primary care data. Annals of Medicine. 41(7). 490–496. 5 indexed citations

20.

Ryan, Ronan & Azeem Majeed. (2002). Prevalence of treated hypertension in general practice in England and Wales, 1994 to 1998. UCL Discovery (University College London). 3 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.

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