John Roos

1.0k total citations
9 papers, 50 citations indexed

About

John Roos is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Social Psychology. According to data from OpenAlex, John Roos has authored 9 papers receiving a total of 50 indexed citations (citations by other indexed papers that have themselves been cited), including 7 papers in Cardiology and Cardiovascular Medicine, 3 papers in Surgery and 1 paper in Social Psychology. Recurrent topics in John Roos's work include Cardiac, Anesthesia and Surgical Outcomes (7 papers), Blood Pressure and Hypertension Studies (4 papers) and Hemodynamic Monitoring and Therapy (2 papers). John Roos is often cited by papers focused on Cardiac, Anesthesia and Surgical Outcomes (7 papers), Blood Pressure and Hypertension Studies (4 papers) and Hemodynamic Monitoring and Therapy (2 papers). John Roos collaborates with scholars based in South Africa and Switzerland. John Roos's co-authors include Margot Flint, F Roodt, Justiaan Swanevelder, Bruce Biccard, M Nejthardt, Estie Cloete, Gareth Davies, Jody Davids, Michael J. Crowther and J Davids and has published in prestigious journals such as Anesthesia & Analgesia, Anaesthesia and Swiss Medical Weekly.

In The Last Decade

John Roos

8 papers receiving 45 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John Roos South Africa 5 39 28 7 4 3 9 50
Rafael Leal Zimmer Brazil 2 30 0.8× 27 1.0× 6 0.9× 2 0.5× 2 0.7× 6 47
Jody Davids South Africa 4 31 0.8× 26 0.9× 5 0.7× 1 0.3× 4 41
Ronan Cusack Ireland 3 26 0.7× 15 0.5× 3 0.4× 5 1.3× 4 38
Chean Lin Chong Brunei 2 20 0.5× 10 0.4× 8 1.1× 7 1.8× 2 39
Christella S. Alphonsus South Africa 4 25 0.6× 17 0.6× 13 1.9× 8 34
Sheeba Hakak India 2 19 0.5× 23 0.8× 11 1.6× 2 40
Alexis Vosooney United States 3 14 0.4× 8 0.3× 6 0.9× 7 1.8× 3 26
Ben Cole United Kingdom 4 30 0.8× 15 0.5× 13 1.9× 5 45
Nishaki Mehta Oza United States 5 17 0.4× 15 0.5× 9 1.3× 1 0.3× 1 0.3× 5 48
Saionara Cristina Francisco Brazil 3 23 0.6× 31 1.1× 14 2.0× 1 0.3× 6 60

Countries citing papers authored by John Roos

Since Specialization
Citations

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

Fields of papers citing papers by John Roos

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John Roos

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

All Works

9 of 9 papers shown
1.
Roos, John, et al.. (2024). Patient and public involvement in academic clinical research in Switzerland – a mixed methods study. Swiss Medical Weekly. 154(12). 3563–3563.
2.
Alphonsus, Christella S., Michael J. Crowther, Ettienne Coetzee, et al.. (2021). A prospective observational study of preoperative natriuretic peptide testing in adult non-cardiac surgical patients in hospitals in Western Cape Province, South Africa. South African Medical Journal. 111(4). 338–338. 1 indexed citations
3.
Rayner, Brian, R.A. Dyer, Margot Flint, et al.. (2020). A multicentre cross-sectional descriptive study evaluating the cardiovascular risk profile of preoperatively identified patients with hypertension. South African Medical Journal. 111(1). 74–74. 3 indexed citations
4.
Dyer, Robert A., Brian Rayner, Margot Flint, et al.. (2020). A Multicenter, Cross-Sectional Quality Improvement Project: The Perioperative Implementation of a Hypertension Protocol by Anesthesiologists. Anesthesia & Analgesia. 131(5). 1401–1408. 6 indexed citations
5.
6.
7.
Crowther, Michael J., M Nejthardt, F Roodt, et al.. (2018). A multicentre, cross-sectional study investigating the prevalence of hypertensive disease in patients presenting for elective surgery in the Western Cape Province, South Africa. South African Medical Journal. 108(7). 590–590. 9 indexed citations
8.
Crowther, Michael J., F Roodt, M Nejthardt, et al.. (2018). The relationship between pre‐operative hypertension and intra‐operative haemodynamic changes known to be associated with postoperative morbidity. Anaesthesia. 73(7). 812–818. 20 indexed citations
9.
Decker, Rik De, et al.. (2017). Human factors: Predictors of avoidable wilderness accidents?. South African Medical Journal. 107(8). 669–669. 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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2026