Jesper Hallas

24.0k total citations · 4 hit papers
476 papers, 17.4k citations indexed

About

Jesper Hallas is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Epidemiology. According to data from OpenAlex, Jesper Hallas has authored 476 papers receiving a total of 17.4k indexed citations (citations by other indexed papers that have themselves been cited), including 96 papers in Cardiology and Cardiovascular Medicine, 78 papers in Surgery and 68 papers in Epidemiology. Recurrent topics in Jesper Hallas's work include Pharmaceutical Practices and Patient Outcomes (57 papers), Health Systems, Economic Evaluations, Quality of Life (51 papers) and Antiplatelet Therapy and Cardiovascular Diseases (35 papers). Jesper Hallas is often cited by papers focused on Pharmaceutical Practices and Patient Outcomes (57 papers), Health Systems, Economic Evaluations, Quality of Life (51 papers) and Antiplatelet Therapy and Cardiovascular Diseases (35 papers). Jesper Hallas collaborates with scholars based in Denmark, United States and United Kingdom. Jesper Hallas's co-authors include Henrik Toft Sørensen, Anton Pottegård, Helle Wallach‐Kildemoes, David Gaist, Annmarie Touborg Lassen, Morten Andersen, Morten Schmidt, Lars Bjerrum, Sigrún Alba Jóhannesdóttir Schmidt and Ove B. Schaffalitzky de Muckadell and has published in prestigious journals such as JAMA, Circulation and Journal of Clinical Oncology.

In The Last Decade

Jesper Hallas

459 papers receiving 17.0k citations

Hit Papers

4 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.

The Danish National Prescription Registry

2011 2.1k citations Henrik Toft Sørensen, Jesper Hallas et al. Scandinavian Journal of Public Health profile →
Data Resource Profile: The Danish National Prescription Registry

2016 1.1k citations Anton Pottegård, Henrik Toft Sørensen et al. International Journal of Epidemiology profile →
The Danish prescription registries.

1997 537 citations David Gaist, Henrik Toft Sørensen et al. profile →
Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study

2021 266 citations Anton Pottegård, Lars Christian Lund et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jesper Hallas Denmark	61	3.5k	3.3k	2.3k	2.1k	2.0k	476	17.4k
Miriam Sturkenboom Netherlands	68	3.6k 1.1×	2.3k 0.7×	2.1k 0.9×	1.1k 0.5×	1.9k 1.0×	461	18.0k
David N. Juurlink Canada	62	3.3k 0.9×	2.2k 0.7×	2.2k 0.9×	1.9k 0.9×	1.6k 0.8×	344	17.0k
Muhammad Mamdani Canada	75	5.0k 1.5×	4.0k 1.2×	3.5k 1.5×	2.0k 0.9×	3.3k 1.7×	549	24.0k
Ian Chi Kei Wong United Kingdom	61	2.1k 0.6×	1.9k 0.6×	1.7k 0.7×	1.9k 0.9×	1.2k 0.6×	668	16.8k
Bernard Burnand Switzerland	51	3.0k 0.9×	4.1k 1.3×	4.7k 2.0×	1.2k 0.6×	2.9k 1.5×	302	20.2k
Walter E. Haefeli Germany	62	2.4k 0.7×	1.5k 0.5×	2.0k 0.8×	2.1k 1.0×	1.0k 0.5×	532	15.3k
Bruno H. Stricker Netherlands	90	9.1k 2.6×	3.7k 1.1×	3.9k 1.7×	1.8k 0.8×	4.1k 2.1×	571	30.4k
Danny Liew Australia	52	2.1k 0.6×	2.5k 0.8×	1.6k 0.7×	877 0.4×	1.1k 0.6×	520	12.4k
Gregory P. Samsa United States	55	2.5k 0.7×	1.7k 0.5×	3.0k 1.3×	1.9k 0.9×	1.3k 0.7×	205	14.3k
Sumit R. Majumdar Canada	78	3.7k 1.1×	5.3k 1.6×	4.6k 2.0×	2.8k 1.3×	1.6k 0.8×	367	21.6k

Countries citing papers authored by Jesper Hallas

Since Specialization

Citations

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

Fields of papers citing papers by Jesper Hallas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jesper Hallas

This figure shows the co-authorship network connecting the top 25 collaborators of Jesper Hallas. A scholar is included among the top collaborators of Jesper Hallas 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 Jesper Hallas. Jesper Hallas 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

Hallas, Jesper, et al.. (2025). Emerging uncertainty on the anti-aging potential of metformin. Ageing Research Reviews. 111. 102817–102817. 1 indexed citations

Elmahdi, Rahma, Martin Ernst, Gry Poulsen, et al.. (2024). Impact of immunosuppressive therapy on SARS-CoV-2 mRNA vaccine effectiveness in patients with immune-mediated inflammatory diseases: a Danish nationwide cohort study. BMJ Open. 14(2). e077408–e077408. 2 indexed citations

Birkeland, Søren, et al.. (2024). Identifying high‐risk medications and error types in Danish patient safety database using disproportionality analysis. Pharmacoepidemiology and Drug Safety. 33(2). e5735–e5735. 1 indexed citations

Thinggaard, Mikael, et al.. (2023). Postmenopausal hormone therapy and mortality before and after the Women’s Health Initiative study. Scientific Reports. 13(1). 539–539. 1 indexed citations

Hald, Stine Munk, Luis A. Garcı́a Rodrı́guez, Sören Möller, et al.. (2022). Association of Long-term Statin Use With the Risk of Intracerebral Hemorrhage. Neurology. 99(7). e711–e719. 15 indexed citations

Rohde, Christopher, Mikkel Højlund, Christiane Gasse, et al.. (2022). Psychopharmacological treatment patterns prior to a schizophrenia diagnosis: A Danish nationwide study. Schizophrenia Research. 246. 268–276. 2 indexed citations

Reilev, Mette, Morten Olesen, Helene Kildegaard, et al.. (2022). Changing characteristics over time of individuals receiving COVID-19 vaccines in Denmark: A population-based descriptive study of vaccine uptake. Scandinavian Journal of Public Health. 50(6). 686–692. 11 indexed citations

Kristensen, Kasper Bruun, Søren Friis, Lars Christian Lund, et al.. (2022). Identification of Drug–Cancer Associations: A Nationwide Screening Study. Cancer Research Communications. 2(6). 552–560. 2 indexed citations

Kristensen, Kasper Bruun, Lars Christian Lund, Peter Bjødstrup Jensen, et al.. (2022). Development and Validation of a Nordic Multimorbidity Index Based on Hospital Diagnoses and Filled Prescriptions. Clinical Epidemiology. Volume 14. 567–579. 24 indexed citations

10.

Hallas, Jesper, et al.. (2021). Evaluating the use of prescription sequence symmetry analysis as a pharmacovigilance tool: A scoping review. Research in Social and Administrative Pharmacy. 18(7). 3079–3093. 29 indexed citations

11.

Rodrı́guez, Luis A. Garcı́a, Lucía Cea Soriano, Francisco J. de Abajo, et al.. (2021). Trends in the use of oral anticoagulants, antiplatelets and statins in four European countries: a population-based study. European Journal of Clinical Pharmacology. 78(3). 497–504. 17 indexed citations

12.

Donneyong, Macarius, et al.. (2021). Prevalence and quality of antihypertensive therapy among hypertension patients enrolled in the Ghana National Health Insurance Scheme. Pharmacoepidemiology and Drug Safety. 30(11). 1566–1575. 2 indexed citations

13.

Gørtz, Sanne, Martin Ernst, Nynne Nyboe Andersen, et al.. (2021). The effect of immunosuppressants on the prognosis of SARS-CoV-2 infection. European Respiratory Journal. 59(4). 2100769–2100769. 14 indexed citations

14.

Reilev, Mette, Kasper Bruun Kristensen, Anton Pottegård, et al.. (2020). Characteristics and predictors of hospitalization and death in the first 11 122 cases with a positive RT-PCR test for SARS-CoV-2 in Denmark: a nationwide cohort. International Journal of Epidemiology. 49(5). 1468–1481. 200 indexed citations

15.

Pottegård, Anton, et al.. (2018). Risk of lactic acidosis in type 2 diabetes patients using metformin: A case control study. PLoS ONE. 13(5). e0196122–e0196122. 32 indexed citations

16.

Pottegård, Anton, et al.. (2018). Perioperative Tranexamic Acid Treatment and Risk of Cardiovascular Events or Death After Total Hip Arthroplasty. Journal of Bone and Joint Surgery. 100(20). 1742–1749. 9 indexed citations

17.

Simonsen, Jane Angel, Hans Mickley, Allan Johansen, et al.. (2017). Outcome of revascularisation in stable coronary artery disease without ischaemia: a Danish registry-based follow-up study. BMJ Open. 7(8). e016169–e016169. 8 indexed citations

18.

Pottegård, Anton, et al.. (2015). Effect of Allopurinol on Cardiovascular Outcomes in Hyperuricemic Patients: A Cohort Study. The American Journal of Medicine. 129(3). 299–306.e2. 61 indexed citations

19.

Pottegård, Anton, Luis A. Garcı́a Rodrı́guez, Frantz Rom Poulsen, Jesper Hallas, & David Gaist. (2015). Antithrombotic drugs and subarachnoid haemorrhage risk. Thrombosis and Haemostasis. 114(11). 1064–1075. 30 indexed citations

20.

Dall, Michael, Ove B. Schaffalitzky de Muckadell, Annmarie Touborg Lassen, & Jesper Hallas. (2010). There is an association between selective serotonin reuptake inhibitor use and uncomplicated peptic ulcers: a population‐based case–control study. Alimentary Pharmacology & Therapeutics. 32(11-12). 1383–1391. 22 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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