Ingvar Bjarnason

5.0k total citations · 1 hit paper
94 papers, 3.8k citations indexed

About

Ingvar Bjarnason is a scholar working on Surgery, Genetics and Epidemiology. According to data from OpenAlex, Ingvar Bjarnason has authored 94 papers receiving a total of 3.8k indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Surgery, 29 papers in Genetics and 27 papers in Epidemiology. Recurrent topics in Ingvar Bjarnason's work include Inflammatory Bowel Disease (27 papers), Microscopic Colitis (20 papers) and Helicobacter pylori-related gastroenterology studies (13 papers). Ingvar Bjarnason is often cited by papers focused on Inflammatory Bowel Disease (27 papers), Microscopic Colitis (20 papers) and Helicobacter pylori-related gastroenterology studies (13 papers). Ingvar Bjarnason collaborates with scholars based in United Kingdom, United States and Japan. Ingvar Bjarnason's co-authors include A J Levi, Jeremy Tibble, G Sigthorsson, Magne K. Fagerhol, K Teahon, Paul Smethurst, Morag Pearson, Terry Smith, P. Prouse and Ian S. Menzies and has published in prestigious journals such as The Lancet, Gastroenterology and American Journal of Clinical Nutrition.

In The Last Decade

Ingvar Bjarnason

92 papers receiving 3.6k 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.

Surrogate markers of intestinal inflammation are predictive of relapse in patients with inflammatory bowel disease

2000 609 citations Jeremy Tibble, G Sigthorsson et al. Gastroenterology profile →

Peers

Countries citing papers authored by Ingvar Bjarnason

Since Specialization

Citations

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

Fields of papers citing papers by Ingvar Bjarnason

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ingvar Bjarnason

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

#	Work	Indexed citations
1	Faecal calprotectin is a surrogate marker of biliary inflammation in primary sclerosing cholangitis associated inflammatory bowel disease 2022 ·Frontline Gastroenterology ·Polychronis Pavlidis, Deepak Joshi, (unknown), Ben Warner, Shraddha Gulati, James L. Alexander, Gemma F. Cross, Tracy Dew, (unknown), John Devlin, Michael A. Heneghan, P Dubois, Ingvar Bjarnason, Nick Powell, Bu Hayee	1
2	Utilization of High-frequency Mini Probe Ultrasound in the Assessment of Colonic Wall Thickness in Patients With Diverticular Disease 2015 ·Surgical Laparoscopy Endoscopy & Percutaneous Techniques ·Charlotte Kvasnovsky, Amyn Haji, Suzanne Ryan, (unknown), Ingvar Bjarnason, Savvas Papagrigoriadis	1
3	Peripheral aetiopathogenic drivers and mediators of Parkinson’s disease and co-morbidities: role of gastrointestinal microbiota 2015 ·Journal of NeuroVirology ·Sylvia M. Dobbs, R. John Dobbs, Clive Weller, André Charlett, (unknown), David Taylor, Mohammad A. A. Ibrahim, Ingvar Bjarnason	40
4	Elevated homocysteine in idiopathic parkinsonism not explained by levodopa therapy 2010 ·British Journal of Clinical Pharmacology ·(unknown), (unknown), Sylvia M. Dobbs, André Charlett, Clive Weller, Ingvar Bjarnason	1
5	Diverticular disease hospital admissions are increasing, with poor outcomes in the elderly and emergency admissions 2009 ·Alimentary Pharmacology & Therapeutics ·Santhini Jeyarajah, Omar Faiz, Alex Bottle, Paul Aylin, Ingvar Bjarnason, Paris Tekkis, Savvas Papagrigoriadis	78
6	Role of Chronic Infection and Inflammation in the Gastrointestinal Tract in the Etiology and Pathogenesis of Idiopathic Parkinsonism 2005 ·Helicobacter ·Clive Weller, André Charlett, Norman L. Oxlade, Sylvia M. Dobbs, R. John Dobbs, D.W. Peterson, Ingvar Bjarnason	44
7	Duodenal ascorbate and ferric reductase in human iron deficiency1–3 2005 ·American Journal of Clinical Nutrition ·(unknown), (unknown), Ingvar Bjarnason, (unknown), Robert J. Simpson	20
8	Granulocyte, macrophage, monocyte apheresis for refractory ulcerative proctitis 2004 ·European Journal of Gastroenterology & Hepatology ·Purushothaman Premchand, Ken Takeuchi, Ingvar Bjarnason	12
9	Specially processed cereals: a clinical innovation for children suffering from inflammatory bowel disease? 2004 ·Scandinavian Journal of Gastroenterology ·Yigael Finkel, Ingvar Bjarnason, Å. Lindblad, Stefan Lange	9
10	Subclinical intestinal inflammation and sacroiliac changes in relatives of patients with ankylosing spondylitis 2003 ·Gastroenterology ·Ingvar Bjarnason, (unknown), Árni Jón Geirsson, G Sigthorsson, Inga Reynisdóttir, Daníel F. Guðbjartsson, (unknown), Roy Sherwood, Kristleifur Kristjánsson, Ólafur Kjartansson, Bjarni Þjóðleifsson	58
11	Áhrif Pentavac- og MMR-bólusetningar á þarma ungbarna 2002 ·Læknablaðið ·Bjarni Þjóðleifsson, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), G Sigthorsson, Matthı́as Kjeld, Ingvar Bjarnason	0
12	Complications of urgent and emergent endoscopy in patients with upper and lower GI bleeding as a function of time: A review of 10,197 cases 2001 ·Gastrointestinal Endoscopy ·(unknown), S Smale, (unknown), (unknown), M. Wong, (unknown), (unknown), Ingvar Bjarnason, Hugh Mulcahy, Douglas G. Adler, (unknown), Amy B. Adler, (unknown), John J. Hermans, Christopher J. Gostout, Todd H. Baron, (unknown)	1
13	Fecal Calprotectin: A Significant Step in the Noninvasive Assessment of Intestinal Inflammation 2001 ·Journal of Pediatric Gastroenterology and Nutrition ·Ingvar Bjarnason, Roy Sherwood	4
14	Small intestinal permeability 2000 ·Current Opinion in Gastroenterology ·S Smale, Jeremy Tibble, Ingvar Bjarnason	7
15	Assessing the site of increased intestinal permeability in coeliac and inflammatory bowel disease. 1996 ·Gut ·K Teahon, Siva G. Somasundaram, Thomas N. Smith, Ian S. Menzies, Ingvar Bjarnason	25
16	Practical Aspects of Enteral Nutrition in the Management of Crohn's Disease 1995 ·Journal of Parenteral and Enteral Nutrition ·K Teahon, Morag Pearson, A J Levi, Ingvar Bjarnason	14
17	Food intolerance and Crohn's disease. 1993 ·Gut ·Morag Pearson, K Teahon, A J Levi, Ingvar Bjarnason	70
18	Ten years' experience with an elemental diet in the management of Crohn's disease. 1990 ·Gut ·K Teahon, Ingvar Bjarnason, Morag Pearson, A J Levi	114
19	Malignant Pancreatic Somatostatinoma in a Patient with Dermatitis herpetiformis and Coeliac Disease 1988 ·Digestion ·S Levi, Ingvar Bjarnason, (unknown), J.M. Polak, (unknown), A J Levi	7
20	Giant lymph node hyperplasia (Castleman's disease) of the mesentery 1984 ·Gastroenterology ·Ingvar Bjarnason, P. Mary Cotes, (unknown), C. D. L. Reid, (unknown), T. J. Peters	9

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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