• J. B. Winsløws Vej 19, 2.

    5000 Odense C


1990 …2022
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Personal profile

Research areas

Tutored by Professor Lars Gram, Odense University’s Clinical Pharmacology Unit, JH established a pharmacoepidemiologic research line in the late 1980s. A major breakthrough came in 1990 with the advent of the Odense University Pharmacoepidemiologic Database (OPED). It has complete capture of all computerised prescriptions in Region of Southern Denmark (population 1.2 million) which allows a detailed account of how drugs are distributed among different users and - by linkage to other data resources - the experience of the drug users in terms of adverse events. Among the research interests are studies of rational prescribing, neurological diseases caused by drug treatment, interventions to improve prescribing among GPs, development of indices to characterise patterns of prescribing and management of dyspepsia. Among the collaborators are the General Practice Research Unit, the Research Unit of Demographics and Statistics and a number of clinical research units at Odense University Hospital.

Recent activities include studies of association between long-term drug use and cancer, on self-controlled designs and on use of communicative measures of risk and benefit.

Education/Academic qualification

MD, University of Copenhagen

Research areas

  • Pharmacological therapy
  • International Comparison
  • Cancer

Fingerprint Dive into the research topics where Jesper Hallas is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

  • 34 Similar Profiles
Denmark Medicine & Life Sciences
Pharmaceutical Preparations Medicine & Life Sciences
Prescriptions Medicine & Life Sciences
Case-Control Studies Medicine & Life Sciences
Population Medicine & Life Sciences
Cohort Studies Medicine & Life Sciences
Confidence Intervals Medicine & Life Sciences
Odds Ratio Medicine & Life Sciences

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Research Output 1990 2020

Antidepressant drug use and subdural hematoma risk

Gaist, D., García Rodríguez, L. A., Hald, S. M., Hellfritzsch, M., Poulsen, F. R., Halle, B., Hallas, J. & Pottegård, A., Feb 2020, In : Journal of Thrombosis and Haemostasis. 18, 2, p. 318-327

Research output: Contribution to journalJournal articleResearchpeer-review

Serotonin Uptake Inhibitors
Pharmaceutical Preparations
Population Control
Case-Control Studies

Associations of low-dose aspirin or other NSAID use with prostate cancer risk in the Danish Diet, Cancer and Health Study

Skriver, C., Dehlendorff, C., Borre, M., Brasso, K., Larsen, S. B., Tjønneland, A., Pottegård, A., Hallas, J., Sørensen, H. T. & Friis, S., Feb 2020, In : Cancer Causes and Control. 31, 2, p. 139-151

Research output: Contribution to journalJournal articleResearchpeer-review

Prostatic Neoplasms
Pharmaceutical Preparations
24 Downloads (Pure)

Effectiveness and safety of direct oral anticoagulants in atrial fibrillation patients switched from vitamin K antagonists: A systematic review and meta-analysis

Hellfritzsch, M., Adelborg, K., Damkier, P., Paaske Johnsen, S., Hallas, J., Pottegård, A. & Lerkevang Grove, E., 1. Jan 2020, In : Basic & Clinical Pharmacology & Toxicology. 126, 1, p. 21-31

Research output: Contribution to journalReviewResearchpeer-review

Open Access
Vitamin K
Confidence Intervals

Impact of EMA regulatory label changes on systemic diclofenac initiation, discontinuation, and switching to other pain medicines in Scotland, England, Denmark, and The Netherlands

Morales, D. R., Morant, S. V., MacDonald, T. M., Mackenzie, I. S., Doney, A. S. F., Mitchell, L., Bennie, M., Robertson, C., Hallas, J., Pottegard, A., Ernst, M. T., Wei, L., Nicholson, L., Morris, C., Ron, M. C., Overbeek, J. A., Smits, E. & Robert, W. V., 3. Jan 2020, In : Pharmacoepidemiology and Drug Safety.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access

Outcome postponement as a potential patient centred measure of therapeutic benefit: examples in cardiovascular medicine

Ennezat, P. V., Le Jemtel, T., Cosgrove, S., Hallas, J. & Hansen, M. R., Jan 2020, In : Acta Cardiologica. 75, 1, p. 10-19

Research output: Contribution to journalComment/debateResearchpeer-review

Randomized Controlled Trials
Numbers Needed To Treat
Risk Reduction Behavior

Activities 2006 2012

International Society for Pharmacoepidemiology (External organisation)

Jesper Hallas (Chairman)
Aug 2012Aug 2015

Activity: MembershipMembership of commitees, commissions, boards, councils, associations, organisations, or similar

University of Tromsø (External organisation)

Jesper Hallas (Member)
10. May 2012

Activity: MembershipMembership of review committee

University of Southern Denmark (External organisation)

Jesper Hallas (Chairman)
2012 → …

Activity: MembershipMembership of research networks or expert groups

University of Oslo (External organisation)

Jesper Hallas (Member)
16. Dec 2011

Activity: MembershipMembership of review committee

Validity of data sources in pharmacoepidemiology

Jesper Hallas (Lecturer)
2. Dec 2011

Activity: Talks and presentationsTalks and presentations in private or public companies

Projects 2019 2022

Press / Media

Bivirkninger - din irriterende følgesvend

Jesper Hallas


1 Media contribution

Press/Media: Press / Media

Debat: Syddansk Universitet: EMA kontrakter er ikke ulovlige

Jesper Hallas


1 Media contribution

Press/Media: Press / Media

SDU har skrevet under på ulovlig tavshedsklausul

Jesper Hallas


1 Media contribution

Press/Media: Press / Media

Ph.d.-forsvar om forbrug af psykofarmaka til ældre med demens

Jesper Hallas


1 Media contribution

Press/Media: Press / Media


Ridder af Dannebrog

Jesper Hallas (Recipient), 26. Oct 2018

Prize: Prizes, scholarships, distinctions

Undervisningspris, Sundhedsvidenskabelige fakultet, SDU, 2010

Jesper Hallas (Recipient), 1. Oct 2010

Prize: Prizes, scholarships, distinctions