Thomas Clausen

5.6k citations

174 papers · 3.8k indexed · 1 hit paper · h-index 31

Impact in

Public Health, Environmental and Occupational Health top 0.5%
- Opioid Use Disorder Treatment
Toxicology top 1%

Papers in

Anesthesiology and Pain Medicine 21
- Pain Management and Opioid Use 20
Toxicology 12
- Forensic Toxicology and Drug Analysis 12

Co-authors: Linn Gjersing Helge Waal John R. M. Caplehorn Svetlana Skurtveit Michael Gossop Ashley Elizabeth Muller Koson Sapprasert John‐Kåre Vederhus
Journals: Addiction (16 papers)Drug and Alcohol Dependence (13 papers)European Addiction Research (11 papers)BMC Health Services Research (11 papers)BMC Psychiatry (6 papers)
Partner nations: Norway United Kingdom Denmark

In The Last Decade

Thomas Clausen

166 papers receiving 3.6k citations

Hit Papers

align trajectories log scale

Cross-cultural adaptation of research instruments: language, setting, time and statistical considerations 2010 · 577 citations

Peers

Countries citing papers authored by Thomas Clausen

Since Specialization

Citations

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

Fields of papers citing papers by Thomas Clausen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside Thomas Clausen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Thomas Clausen Line = papers co-authored together Thomas Clausen links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Increased cancer incidence and mortality among people with opioid use‐related disorders: A nation‐wide cohort study Addiction ·Xiao Yong, Aleksi Hamina, Vidar Hjellvik, Thomas Clausen, Svetlana Skurtveit	2024	2
2	Change in substance use among patients in opioid maintenance treatment: baseline to 1-year follow-up Harm Reduction Journal ·이명호, John‐Kåre Vederhus, Thomas Clausen	2024	0
3	Fatal drug overdoses in individuals treated pharmacologically for chronic pain: a nationwide register-based study British Journal of Anaesthesia ·Aleksi Hamina, Ingvild Odsbu, Vidar Hjellvik, Zhang Junzhong, Thomas Clausen, Svetlana Skurtveit	2023	3
4	Cause-Specific Mortality among Patients in Treatment for Opioid Use Disorder in Multiple Settings: A Prospective Comparative Cohort Study European Addiction Research ·Syahida Binti, Svetlana Skurtveit, Thomas Clausen, Morten Hesse, Viktor Mravčík, E Bonifacio, Hava Lofton-Tomenius, Birgitte Thylstrup, A. Perrin, 곽인영, Ingvild Odsbu, Roman Gabrhelík	2023	5
5	Describing long‐term opioid use utilizing Nordic prescription registers—A Norwegian example Basic & Clinical Pharmacology & Toxicology ·Aleksi Hamina, Vidar Hjellvik, Marte Handal, Ingvild Odsbu, Thomas Clausen, Svetlana Skurtveit	2022	11
6	Individuals Dying of Overdoses Related to Pharmaceutical Opioids Differ from Individuals Dying of Overdoses Related to Other Substances: A Population-Based Register Study European Addiction Research ·Svetlana Skurtveit, Ingvild Odsbu, Linn Gjersing, Marte Handal, Zhang Junzhong, Thomas Clausen, Aleksi Hamina	2022	14
7	Cohort Description: Preventing an Opioid Epidemic in Norway – Focusing on Treatment of Chronic Pain (POINT) – A National Registry-Based Study Clinical Epidemiology ·Aleksi Hamina, Ingvild Odsbu, Petter C. Borchgrevink, Li‐Chia Chen, Thomas Clausen, 武昌前田, Kathryn M. Kerns, Marte Handal, Sirpa Hartikainen, Vidar Hjellvik, Caldirola, B. Ropers, Geana Paula Kurita, Emma Anselin, Zhang Junzhong, А.А. Илюшин, Per Sjøgren, Svetlana Skurtveit	2022	13
8	PriSUD-Nordic—Diagnosing and Treating Substance Use Disorders in the Prison Population: Protocol for a Mixed Methods Study JMIR Research Protocols ·Anne Bukten, 袁勤俭, 正仁小笠原, Thomas Ugelvik, Svetlana Skurtveit, Roman Gabrhelík, Torbjørn Skarðhamar, Ingunn Olea Lund, Ingrid Amalia Havnes, Eline Borger Rognli, Zheng Chang, Seena Fazel, Christine Friestad, Morten Hesse, Paula Gonçalves Costa, Wu Wanyi, Anja Dirkzwager, Thomas Clausen, A. Perrin, Marianne Riksheim Stavseth	2022	11
9	Take-Home Naloxone Kits: Attitudes and Likelihood-Of-Use Outcomes from a European Survey of Potential Overdose Witnesses European Addiction Research ·Rebecca McDonald, Harvey Hoyt, Katri Abel‐Ollo, Jorge de Araújo Rocha, Thomas Clausen, Ed Day, E. Biet, Andrew McAuley, Helle Vendel Petersen, jiayao fu, Atul Kumar Roy, John Strang	2022	5
10	Effects of a brief pre-admission telephone reminder on no-show and dropout rates in substance use disorder treatment: a quasi-experimental study Substance Abuse Treatment Prevention and Policy ·David B. Seery, E.U. Syed, Siri Håvås Haugland, Thomas Clausen, John‐Kåre Vederhus	2022	2
11	Health economic evaluation of introducing a PPSV23-based vaccination programme to adults aged 65 and above, and an extension to the 60-64 age group in Denmark Expert Review of Vaccines ·Dexing Qin, Dana Wright, Krystal Finney, Jens Olsen, Kelly Johnson, Goran Benčina, Thomas Clausen, Carsten Schade Larsen	2021	4
12	Injury Prevention and long-term Outcomes following Trauma—the IPOT project: a protocol for prospective nationwide registry-based studies in Norway BMJ Open ·Jo S Stenehjem, Olav Røise, Trond Nordseth, Thomas Clausen, Bård Natvig, Svetlana Skurtveit, Torsten Eken, Thomas Kristiansen, Jon Michael Gran, Leiv Arne Rosseland	2021	4
13	Desistance from crime following substance use treatment: the role of treatment retention, social network and self-control BMC Psychiatry ·正仁小笠原, Thomas Clausen, Svetlana Skurtveit, Anne Bukten	2021	5
14	COVID-19 survey among people who use drugs in three cities in Norway Drug and Alcohol Dependence ·Gabrielle K. Welle-Strand, Svetlana Skurtveit, Thomas Clausen, Fan Xiang-wei, Linn Gjersing	2020	19
15	Prescribed opioid analgesic use developments in three Nordic countries, 2006–2017 Scandinavian Journal of Pain ·Ashley Elizabeth Muller, Thomas Clausen, Per Sjøgren, Ingvild Odsbu, Svetlana Skurtveit	2019	75
16	Drug-related community issues and the required interventions in open drug scenes in Tehran, Iran: a qualitative study protocol BMJ Open ·Pradnya S. Yenkar, Harmain Ajiwibowo, Meroe Vameghi, Hadi Ranjbar, Reza Arezoomandan, Thomas Clausen, Helge Waal	2019	4
17	Mortality and causes of death among patients with opioid use disorder receiving opioid agonist treatment: a national register study BMC Health Services Research ·J.T. Ubbink, Thomas Clausen, Helge Waal, Jūratė Šaltytė Benth, Ivar Skeie	2019	37
18	Factors associated with dropout among patients in opioid maintenance treatment (OMT) and predictors of re-entry. A national registry-based study Addictive Behaviors ·Anne Bukten, Svetlana Skurtveit, Helge Waal, Thomas Clausen	2014	32
19	Therapist assisted bibliotherapy for children with anxiety disorders: preliminary results of a randomized controlled trial Mikael Thastum, Lisbeth Flindt Jørgensen, Guo Rui, Thomas Clausen, Anna Flávia Silva Alves Silva, Ксения Бочарникова, Kristian Bech Arendt	2013	1
20	'Diversion’ of methadone or buprenorphine: 'harm’ versus 'helping’ Harm Reduction Journal ·Ingrid Amalia Havnes, Thomas Clausen, Anne‐Lise Middelthon	2013	39

About Thomas Clausen

Thomas Clausen is a scholar working on Anesthesiology and Pain Medicine, Toxicology, Public Health, Environmental and Occupational Health, Epidemiology and Applied Psychology, having authored 174 papers that have together received 3.8k indexed citations. Recurring topics across this work include Opioid Use Disorder Treatment (93 papers), Substance Abuse Treatment and Outcomes (89 papers), Prenatal Substance Exposure Effects (24 papers), Pain Management and Opioid Use (20 papers), HIV, Drug Use, Sexual Risk (14 papers), Schizophrenia research and treatment (13 papers), Forensic Toxicology and Drug Analysis (12 papers) and Mental Health Treatment and Access (11 papers). The work is most often cited by research in Public Health, Environmental and Occupational Health (1.6k citations), Toxicology (163 citations), Anesthesiology and Pain Medicine (264 citations), Epidemiology (1.5k citations) and Clinical Psychology (573 citations). Thomas Clausen has collaborated with scholars based in Norway, United Kingdom and Denmark. Frequent co-authors include Linn Gjersing, Helge Waal, John R. M. Caplehorn, Svetlana Skurtveit, Michael Gossop, Ashley Elizabeth Muller, Koson Sapprasert, John‐Kåre Vederhus, Anne Bukten and Øistein Kristensen. Their work appears in journals such as Addiction, Drug and Alcohol Dependence, European Addiction Research, BMC Health Services Research and BMC Psychiatry.

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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