J K Ritchie

4.7k total citations
37 papers, 3.4k citations indexed

About

J K Ritchie is a scholar working on Surgery, Genetics and Epidemiology. According to data from OpenAlex, J K Ritchie has authored 37 papers receiving a total of 3.4k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Surgery, 23 papers in Genetics and 21 papers in Epidemiology. Recurrent topics in J K Ritchie's work include Inflammatory Bowel Disease (23 papers), Microscopic Colitis (16 papers) and Diverticular Disease and Complications (10 papers). J K Ritchie is often cited by papers focused on Inflammatory Bowel Disease (23 papers), Microscopic Colitis (16 papers) and Diverticular Disease and Complications (10 papers). J K Ritchie collaborates with scholars based in United States and United Kingdom. J K Ritchie's co-authors include J E Lennard-Jones, William Connell, J E Lennard‐Jones, P R Hawley, C B Williams, B C Morson, David M. Melville, MA Kamm, Michael A. Kamm and R K S Phillips and has published in prestigious journals such as The Lancet, Gastroenterology and Gut.

In The Last Decade

J K Ritchie

37 papers receiving 3.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J K Ritchie United States 29 1.9k 1.5k 1.4k 989 530 37 3.4k
Adrian J. Greenstein United States 38 3.3k 1.7× 2.8k 1.9× 2.5k 1.8× 921 0.9× 641 1.2× 107 5.3k
Tomas M. Heimann United States 29 1.3k 0.7× 968 0.7× 1.4k 1.0× 548 0.6× 396 0.7× 72 2.6k
Jean–Marc Phelip France 31 1.3k 0.7× 1.2k 0.8× 830 0.6× 1.3k 1.3× 326 0.6× 141 3.2k
Ole Høie Norway 21 1.9k 1.0× 1.7k 1.2× 1.0k 0.7× 480 0.5× 117 0.2× 36 2.7k
D. Héresbach France 33 613 0.3× 793 0.5× 1.9k 1.3× 1.4k 1.4× 265 0.5× 159 3.8k
R Parc France 41 1.4k 0.7× 1.3k 0.9× 4.7k 3.2× 3.1k 3.2× 767 1.4× 216 7.0k
Fredric Daum United States 25 1.3k 0.7× 958 0.7× 959 0.7× 123 0.1× 66 0.1× 85 2.3k
Fumihito Hirai Japan 25 1.3k 0.7× 913 0.6× 1.0k 0.7× 305 0.3× 82 0.2× 156 2.5k
Simone Saibeni Italy 28 1.1k 0.6× 809 0.6× 850 0.6× 165 0.2× 110 0.2× 99 2.3k
Stephan Targan United States 16 2.1k 1.1× 1.5k 1.0× 1.0k 0.7× 149 0.2× 86 0.2× 45 3.1k

Countries citing papers authored by J K Ritchie

Since Specialization
Citations

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

Fields of papers citing papers by J K Ritchie

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J K Ritchie. 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 J K Ritchie. The network helps show where J K Ritchie may publish in the future.

Co-authorship network of co-authors of J K Ritchie

This figure shows the co-authorship network connecting the top 25 collaborators of J K Ritchie. A scholar is included among the top collaborators of J K Ritchie 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 J K Ritchie. J K Ritchie 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.
Senapati, Apurbalal, C. J. Tibbs, J K Ritchie, R J Nicholls, & P R Hawley. (1996). Stenosis of the pouch anal anastomosis following restorative proctocolectomy. International Journal of Colorectal Disease. 11(2). 57–59. 35 indexed citations
2.
Melville, David M., J K Ritchie, R J Nicholls, & P R Hawley. (1994). Surgery for ulcerative colitis in the era of the pouch: the St Mark's Hospital experience.. Gut. 35(8). 1076–1080. 57 indexed citations
3.
Connell, William, J P Sheffield, Michael A. Kamm, et al.. (1994). Lower gastrointestinal malignancy in Crohn's disease.. Gut. 35(3). 347–352. 115 indexed citations
4.
Connell, William, Michael A. Kamm, J K Ritchie, et al.. (1994). Long-term neoplasia risk after azathioprine treatment in inflammatory bowel disease. The Lancet. 343(8908). 1249–1252. 364 indexed citations
5.
Londoño-Schimmer, Eduardo, et al.. (1994). Overlapping anal sphincter repair for faecal incontinence due to sphincter trauma: five year follow-up functional results. International Journal of Colorectal Disease. 9(2). 110–113. 104 indexed citations
6.
Connell, William, MA Kamm, J K Ritchie, & J E Lennard-Jones. (1993). Bone marrow toxicity caused by azathioprine in inflammatory bowel disease: 27 years of experience.. Gut. 34(8). 1081–1085. 390 indexed citations
7.
Levitt, Michael, J K Ritchie, J E Lennard-Jones, & R K S Phillips. (1991). Pyoderma gangrenosum in inflammatory bowel disease. British journal of surgery. 78(6). 676–678. 72 indexed citations
8.
Scott, A. D. N., J K Ritchie, & R K S Phillips. (1991). Blood transfusion and recurrent Crohn's disease. British journal of surgery. 78(4). 455–458. 23 indexed citations
9.
Lennard-Jones, J E, David M. Melville, B C Morson, J K Ritchie, & C B Williams. (1990). Precancer and cancer in extensive ulcerative colitis: findings among 401 patients over 22 years.. Gut. 31(7). 800–806. 335 indexed citations
10.
Alstead, E M, J K Ritchie, J E Lennard-Jones, M J G Farthing, & M. L. Clark. (1990). Safety of azathioprine in pregnancy in inflammatory bowel disease. Gastroenterology. 99(2). 443–446. 204 indexed citations
11.
Melville, David M., Jeremy R. Jass, Neil A. Shepherd, et al.. (1988). Dysplasia and Deoxyribonucleic Acid Aneuploidy in the Assessment of Precancerous Changes in Chronic Ulcerative Colitis. Gastroenterology. 95(3). 668–675. 99 indexed citations
12.
Elliott, Peter R., J K Ritchie, & J E Lennard-Jones. (1985). Prognosis of colonic Crohn's disease.. BMJ. 291(6489). 178–178. 15 indexed citations
13.
Ritchie, J K, P R Hawley, & J E Lennard-Jones. (1981). Prognosis of carcinoma in ulcerative colitis.. Gut. 22(9). 752–755. 52 indexed citations
14.
Butt, James H., J E Lennard‐Jones, & J K Ritchie. (1980). A Practical Approach to the Risk of Cancer in Inflammatory Bowel Disease: Reassure, Watch, or Act?. Medical Clinics of North America. 64(6). 1203–1220. 46 indexed citations
15.
Lennard‐Jones, J E, et al.. (1975). Assessment of severity in colitis: a preliminary study.. Gut. 16(8). 579–584. 149 indexed citations
16.
Dilawari, J B, et al.. (1975). Estimation of carcinoembryonic antigen in ulcerative colitis with special reference to malignant change.. Gut. 16(4). 255–260. 12 indexed citations
17.
Ritchie, J K. (1974). Results of Surgery for Inflammatory Bowel Disease: A Further Survey of One Hospital Region. BMJ. 1(5902). 264–268. 36 indexed citations
18.
Lennard‐Jones, J E, Jennifer Parrish, J J Misiewicz, et al.. (1974). PROSPECTIVE STUDY OF OUTPATIENTS WITH EXTENSIVE COLITIS. The Lancet. 303(7866). 1065–1067. 39 indexed citations
19.
Ritchie, J K & H E Lockhart-Mummery. (1973). Non-restorative surgery in the treatment of Crohn's disease of the large bowel. Gut. 14(4). 263–269. 51 indexed citations
20.

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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