Roar Johnsen
Impact in
- Gastroenterology top 0.2%
- Gastroesophageal reflux and treatments
- Gastrointestinal motility and disorders
- Immunology and Allergy top 2%
Papers in
-
- Workplace Health and Well-being 22
- Physiology 15
- Asthma and respiratory diseases 10
- Co-authors
- Ola Storrø (35 shared papers)Torbjørn Øien (29 shared papers)Kristian Hveem (9 shared papers)Jesper Lagergren (8 shared papers)Bjørn Straume (10 shared papers)Christian Kvikne Dotterud (9 shared papers)Steinar Westin (8 shared papers)Olav Helge Førde (9 shared papers)
- Journals
- BMC Public Health (15 papers)Journal of Occupational Rehabilitation (9 papers)BMC Health Services Research (9 papers)Scandinavian Journal of Primary Health Care (5 papers)Scandinavian Journal of Public Health (5 papers)
- Partner nations
- NorwaySwedenUnited States
In The Last Decade
Roar Johnsen
155 papers receiving 5.5k citations
Peers
Comparison fields: 5 of 148
- Gastroenterology 1.0k
- Immunology and Allergy 226
- Pharmacy 158
- Dermatology 250
- General Health Professions 664
Countries citing papers authored by Roar Johnsen
This map shows the geographic impact of Roar Johnsen'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 Roar Johnsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roar Johnsen more than expected).
Fields of papers citing papers by Roar Johnsen
This network shows the impact of papers produced by Roar Johnsen. 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 Roar Johnsen. The network helps show where Roar Johnsen may publish in the future.
Co-authors
The 25 scholars most cited alongside Roar Johnsen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
Showing the 20 most-cited of 158 papers — load more, or switch the sort, to bring in the rest.
| # | Work | ||
|---|---|---|---|
| 1 | 2003 | 383 | |
| 2 | 2010 | 231 | |
| 3 | 2002 | 217 | |
| 4 | 1991 | 185 | |
| 5 | 2013 | 141 | |
| 6 | 2003 | 123 | |
| 7 | 2001 | 123 | |
| 8 | 2000 | 122 | |
| 9 | 1992 | 117 | |
| 10 | 1990 | 115 | |
| 11 | 2007 | 113 | |
| 12 | 1993 | 113 | |
| 13 | 2015 | 105 | |
| 14 | 2016 | 103 | |
| 15 | 2012 | 103 | |
| 16 | 2015 | 91 | |
| 17 | 2004 | 91 | |
| 18 | 2009 | 90 | |
| 19 | 2000 | 87 | |
| 20 | 1996 | 86 |
About Roar Johnsen
Roar Johnsen is a scholar working on General Health Professions, Physiology, Gastroenterology, Surgery and Molecular Biology, having authored 158 papers that have together received 5.8k indexed citations. Recurring topics across this work include Workplace Health and Well-being (22 papers), Gut microbiota and health (12 papers), Gastroesophageal reflux and treatments (12 papers), Musculoskeletal pain and rehabilitation (11 papers), Helicobacter pylori-related gastroenterology studies (10 papers), Asthma and respiratory diseases (10 papers), Clostridium difficile and Clostridium perfringens research (8 papers) and Occupational Therapy Practice and Research (8 papers). The work is most often cited by research in Gastroenterology (1.0k citations), Immunology and Allergy (226 citations), Pharmacy (158 citations), Dermatology (250 citations) and General Health Professions (664 citations). Roar Johnsen has collaborated with scholars based in Norway, Sweden and United States. Frequent co-authors include Ola Storrø, Torbjørn Øien, Kristian Hveem, Jesper Lagergren, Bjørn Straume, Christian Kvikne Dotterud, Steinar Westin, Olav Helge Førde, Knut Rudi and Magnus Nilsson. Their work appears in journals such as BMC Public Health, Journal of Occupational Rehabilitation, BMC Health Services Research, Scandinavian Journal of Primary Health Care and Scandinavian Journal of Public Health.
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.