Tor‐Ivar Karlsen

25 papers and 397 indexed citations i.

About

Tor‐Ivar Karlsen is a scholar working on Surgery, General Health Professions and Pharmacy. According to data from OpenAlex, Tor‐Ivar Karlsen has authored 25 papers receiving a total of 397 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Surgery, 6 papers in General Health Professions and 6 papers in Pharmacy. Recurrent topics in Tor‐Ivar Karlsen’s work include Bariatric Surgery and Outcomes (8 papers), Obesity and Health Practices (6 papers) and Obesity, Physical Activity, Diet (3 papers). Tor‐Ivar Karlsen is often cited by papers focused on Bariatric Surgery and Outcomes (8 papers), Obesity and Health Practices (6 papers) and Obesity, Physical Activity, Diet (3 papers). Tor‐Ivar Karlsen collaborates with scholars based in Norway, United States and United Kingdom. Tor‐Ivar Karlsen's co-authors include Gerd Karin Natvig, Jøran Hjelmesæth, Ronette L. Kolotkin, John Roger Andersen, Villy Våge, Anny Aasprang, Bjørg Dale, Einar Kristian Tveitå, Serena Tonstad and Rune Sandbu and has published in prestigious journals such as Social Science & Medicine, SLEEP and BMJ Open.

In The Last Decade

Co-authorship network of co-authors of Tor‐Ivar Karlsen i

Fields of papers citing papers by Tor‐Ivar Karlsen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Tor‐Ivar Karlsen. 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 Tor‐Ivar Karlsen. The network helps show where Tor‐Ivar Karlsen may publish in the future.

Countries citing papers authored by Tor‐Ivar Karlsen

Since Specialization
Citations

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

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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2025