Colm O’Morain

33.6k total citations · 11 hit papers
272 papers, 22.6k citations indexed

About

Colm O’Morain is a scholar working on Surgery, Genetics and Gastroenterology. According to data from OpenAlex, Colm O’Morain has authored 272 papers receiving a total of 22.6k indexed citations (citations by other indexed papers that have themselves been cited), including 180 papers in Surgery, 76 papers in Genetics and 75 papers in Gastroenterology. Recurrent topics in Colm O’Morain's work include Helicobacter pylori-related gastroenterology studies (143 papers), Inflammatory Bowel Disease (71 papers) and Eosinophilic Esophagitis (62 papers). Colm O’Morain is often cited by papers focused on Helicobacter pylori-related gastroenterology studies (143 papers), Inflammatory Bowel Disease (71 papers) and Eosinophilic Esophagitis (62 papers). Colm O’Morain collaborates with scholars based in Ireland, United Kingdom and United States. Colm O’Morain's co-authors include Françis Mégraud, Peter Malfertheiner, Javier P. Gisbert, David Y. Graham, Anthony Axon, Theodore Rokkas, Curt Tysk, Emad El‐Omar, A J Levi and Vibeke Binder and has published in prestigious journals such as Nature, New England Journal of Medicine and The Lancet.

In The Last Decade

Colm O’Morain

268 papers receiving 21.8k citations

Hit Papers

Association of NOD2 leucine-rich repeat variants with sus... 1996 2026 2006 2016 2001 2016 2012 2010 2002 1000 2.0k 3.0k 4.0k

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Colm O’Morain Ireland 57 14.3k 6.4k 6.3k 4.9k 4.6k 272 22.6k
Javier P. Gisbert Spain 85 18.8k 1.3× 7.4k 1.2× 8.6k 1.4× 7.2k 1.5× 6.6k 1.4× 890 29.9k
Emad El‐Omar United Kingdom 66 16.2k 1.1× 1.3k 0.2× 5.8k 0.9× 2.4k 0.5× 6.0k 1.3× 228 24.7k
Toshifumi Hibi∥ Japan 81 7.6k 0.5× 9.9k 1.5× 3.0k 0.5× 8.3k 1.7× 2.0k 0.4× 788 26.6k
Richard M. Peek United States 79 17.7k 1.2× 1.2k 0.2× 2.4k 0.4× 1.8k 0.4× 4.6k 1.0× 313 25.3k
Pierre Michetti Switzerland 43 5.2k 0.4× 3.9k 0.6× 1.4k 0.2× 3.2k 0.7× 824 0.2× 187 10.9k
Julie Parsonnet United States 62 11.1k 0.8× 616 0.1× 2.1k 0.3× 3.0k 0.6× 3.9k 0.9× 261 18.4k
Khean‐Lee Goh Malaysia 57 6.9k 0.5× 1.1k 0.2× 3.6k 0.6× 2.9k 0.6× 3.2k 0.7× 297 13.0k
G. N. J. Tytgat Netherlands 64 11.8k 0.8× 928 0.1× 5.2k 0.8× 1.4k 0.3× 5.5k 1.2× 319 15.2k
Barry J. Marshall Australia 50 11.4k 0.8× 398 0.1× 3.2k 0.5× 1.2k 0.2× 3.1k 0.7× 222 14.4k
Sander J. H. van Deventer Netherlands 72 4.9k 0.3× 7.7k 1.2× 842 0.1× 7.7k 1.6× 1.4k 0.3× 269 22.1k

Countries citing papers authored by Colm O’Morain

Since Specialization
Citations

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

Fields of papers citing papers by Colm O’Morain

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Colm O’Morain. 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 Colm O’Morain. The network helps show where Colm O’Morain may publish in the future.

Co-authorship network of co-authors of Colm O’Morain

This figure shows the co-authorship network connecting the top 25 collaborators of Colm O’Morain. A scholar is included among the top collaborators of Colm O’Morain 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 Colm O’Morain. Colm O’Morain 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.
Rokkas, Theodore, Javier P. Gisbert, Konstantinos Ekmektzoglou, et al.. (2024). Comparative maintenance performance of all biologic agents and small molecules in ulcerative colitis: a network meta-analysis. European Journal of Gastroenterology & Hepatology. 36(5). 520–533. 6 indexed citations
2.
Boltin, Doron, Adi Lahat, Olga P. Nyssen, et al.. (2021). European Registry on Helicobacter pylori management (Hp-EuReg): First-line Therapy in Israel.. PubMed. 23(1). 38–42. 2 indexed citations
3.
Smith, Sinéad M., Breida Boyle, Denise Brennan, et al.. (2017). The Irish Helicobacter pylori Working Group consensus for the diagnosis and treatment of H. pylori infection in adult patients in Ireland. European Journal of Gastroenterology & Hepatology. 29(5). 552–559. 27 indexed citations
4.
Malfertheiner, Peter, Françis Mégraud, Colm O’Morain, et al.. (2016). Management of Helicobacter pylori infection—the Maastricht V/Florence Consensus Report. Gut. 66(1). 6–30. 2089 indexed citations breakdown →
5.
Befrits, Ragnar, Annika Olsson, Séverine Vermeire, et al.. (2013). Tolerability of Shortened Infliximab Infusion in Scheduled Maintenance Therapy for IBD: A Prospective Multi-center European Cohort Study. Journal of Gastroenterology and Hepatology Research. 2(6). 638–641. 1 indexed citations
6.
Malfertheiner, Peter, Françis Mégraud, Colm O’Morain, et al.. (2012). Management of Helicobacter pylori infection—the Maastricht IV/ Florence Consensus Report. Gut. 61(5). 646–664. 1724 indexed citations breakdown →
7.
Ryan, Barbara M., et al.. (2007). Colonoscopy completion rates--are we prepared for a national screening programme?. PubMed. 100(9). 585–7. 2 indexed citations
8.
OʼSullivan, Maria & Colm O’Morain. (2001). Liquid diets for Crohn's disease. Gut. 48(6). 757–757. 9 indexed citations
9.
McNamara, Deirdre & Colm O’Morain. (1999). Gastro-oesophageal reflux disease and Helicobacter pylori : an intricate relation. Gut. 45(suppl 1). I13–I17. 21 indexed citations
10.
Cahill, Rachel, et al.. (1996). Gastric epithelial cell kinetics in the progression from normal mucosa to gastric carcinoma.. Gut. 38(2). 177–181. 106 indexed citations
11.
Xia, Han, Henry J. Windle, D. G. Marshall, et al.. (1995). Recrudescence of Helicobacter pylori after apparently successful eradication: novel application of randomly amplified polymorphic DNA fingerprinting.. Gut. 37(1). 30–34. 74 indexed citations
12.
Faivre, Jean, M C Boutron, F Doyon, et al.. (1993). The ECP calcium fibre polyp prevention study preliminary report. ECP Colon Group.. PubMed. 2 Suppl 2. 99–106. 8 indexed citations
13.
Cahill, Rachel, Kathryn O’Sullivan, Paul M. Mathias, et al.. (1993). Effects of vitamin antioxidant supplementation on cell kinetics of patients with adenomatous polyps.. Gut. 34(7). 963–967. 49 indexed citations
14.
Darzi, Ara, J. R. T. Monson, P. W. N. Keeling, et al.. (1991). Combined ultrasound-guided extracorporeal shockwave lithotripsy and MTBE instillation in the treatment of common bile duct stones.. PubMed. 38(1). 36–8. 4 indexed citations
15.
Humphreys, H., Stephen C Bourke, Cornelius P. Dooley, et al.. (1988). Effect of treatment on Campylobacter pylori in peptic disease: a randomised prospective trial.. Gut. 29(3). 279–283. 52 indexed citations
16.
O’Morain, Colm, Anthony W. Segal, & A J Levi. (1984). Elemental diet as primary treatment of acute Crohn's disease: a controlled trial.. BMJ. 288(6434). 1859–1862. 334 indexed citations
17.
O’Morain, Colm, Paul Smethurst, A J Levi, & T. J. Peters. (1984). Organelle pathology in ulcerative and Crohn's colitis with special reference to the lysosomal alterations.. Gut. 25(5). 455–459. 25 indexed citations
18.
O’Morain, Colm, Paul Smethurst, Caroline J Doré, & A J Levi. (1984). Reversible male infertility due to sulphasalazine: studies in man and rat.. Gut. 25(10). 1078–1084. 164 indexed citations
19.
O’Morain, Colm, Paul Smethurst, A J Levi, & Timothy J. Peters. (1983). Biochemical analysis of enzymic markers of inflammation in rectal biopsies from patients with ulcerative colitis and Crohn's disease.. Journal of Clinical Pathology. 36(11). 1312–1316. 15 indexed citations
20.
O’Morain, Colm, Anthony W. Segal, & A J Levi. (1980). Elemental diets in treatment of acute Crohn's disease.. BMJ. 281(6249). 1173–1175. 114 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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