Tarjei Widding-Havneraas
PhD candidate in Epidemiology, University of Bergen


I am a PhD candidate in Epidemiology at the Department of Clinical Medicine, University of Bergen, Norway and the Competence Centre for Research and Education in Forensic Psychiatry, Haukeland University Hospital with supervisors Arnstein Mykletun (UiT), Henrik Daae Zachrisson (UiO), Anne Halmøy (UiB), and Ingvar Bjelland (UiB).

In 2021-2022, I had the privilege of working with Felix Elwert as an honorary fellow at University of Wisconsin-Madison, USA. During my stay we worked on quasi-experimental designs with Norwegian administrative data.

My PhD has included training in epidemiology and causal inference from London School of Hygiene and Tropical Medicine and University of Essex. I hold an MPhil in Sociology and a BSc in Economics from the University of Bergen. In my spare time, I enjoy powerlifting, hiking, art, and books.


PhD project: Effects of ADHD medication on long-term functional outcomes

My PhD examines (i) the use of variation in medical practice patterns as instrumental variables in health research, (ii) the extent to which ADHD symptoms, diagnosis, and medication vary geographically, and (iii) effects of ADHD medication on long-term risk of injuries and crime.

Research interests

Substantive

  • Clinical epidemiology

  • Psychiatric epidemiology

  • Social stratification

Methods

  • Causal inference

  • Instrumental variables

Peer-reviewed publications

(7) Tarjei Widding-Havneraas & Henrik Daae Zachrisson. A Gentle Introduction to Instrumental Variables. 2022. Journal of Clinical Epidemiology.

(6) Tarjei Widding-Havneraas, Simen Markussen, Felix Elwert, Ingvild Lyhmann, Ingvar Bjelland, Anne Halmøy, Ashmita Chaulagain, Eivind Ystrøm, Arnstein Mykletun, Henrik Daae Zachrisson. Geographical variation in ADHD: do diagnoses reflect symptom levels? 2022. European Child & Adolescent Psychiatry.

(5) Tarjei Widding-Havneraas, Ashmita Chaulagain, Ingvild Lyhmann, Henrik Daae Zachrisson, Felix Elwert, Simen Markussen, David McDaid, Arnstein Mykletun. Preference-based instrumental variables in health research rely on important and underreported assumptions: a systematic review. 2021. Journal of Clinical Epidemiology.

(4) Arnstein Mykletun, Tarjei Widding-Havneraas, Ashmita Chaulagain, Ingvild Lyhmann, Ingvar Bjelland, Anne Halmøy, Felix Elwert, Peter Butterworth, Simen Markussen, Henrik Daae Zachrisson, Knut Rypdal. Causal modeling of variation in clinical practice and long-term outcomes of ADHD using Norwegian registry data: the ADHD controversy project. 2021. BMJ Open.

(3) Tarjei Widding-Havneraas & Siri Hansen Pedersen. The role of welfare regimes in the relationship between childhood economic stress and adult health: a multilevel study of 20 European countries. 2020. SSM - Population Health.

(2) Beate Brinchmann, Tarjei Widding-Havneraas, Matthew Modini, Miles Rinaldi, Cathrine F. Moe, A-La Park, Eoin Killackey, Samuel B. Harvey, Arnstein Mykletun. A meta-regression of the impact of policy on the efficacy of Individual Placement and Support. 2019. Acta Scandinavica Psychiatrica.

(1) Tarjei Widding-Havneraas. Young adults not in employment, education or training: a register-based study, 1993–2009. 2016. Norwegian Journal of Working Life Studies.

Other publications

Grants

  • Research Council Norway: “Controversies in Psychiatry: Coercive Measures and Medication” Haukeland University Hospital. Role: Project participant. PI: Arnstein Mykletun, € 985,000, 2021-2026.

  • Western Norway Regional Health Authority (Helse Vest): Research stay, University of Wisconsin-Madison, USA, 2021-2022.

  • National Research School for Epidemiological Research (EPINOR): Course "Causal Inference in Epidemiology: Recent Methodological Developments", London School of Hygiene & Tropical Medicine, UK, 2019.

  • Research Council Norway (FRIPRO): “ADHD Controversy” Haukeland University Hospital. Role: Co-applicant. PI: Arnstein Mykletun, € 1,000,000, 2021-2024.

  • Western Norway Regional Health Authority (Helse Vest): “Effect of ADHD medication on long-term functional outcomes”. Personal PhD scholarship, € 285,000, 2018-2023.

Memberships

  • 2022 Society for Epidemiological Research

  • 2021– Royal Statistical Society

  • 2021– International Epidemiological Association

  • 2021– The John Snow Society

  • 2017– The Norwegian Epidemiological Association

  • 2013– The Norwegian Sociological Association