2025

• Angelsen, Jon-Helge; Yaqub, Sheraz; Hegvik, Tor-Arne; Nymo, Linn Såve; Veen, Torhild; Dagenborg, Vegar Johansen. (2025) Outcomes of simultaneous resection for colorectal liver metastases: A nationwide cohort study (2005–2022). Surgery Open Science
  Vitenskapelig artikkel

2024

• Hegvik, Tor-Arne; Zhou, Yanyan; Brauckhoff, Katrin; Furu, Kari; Hjellvik, Vidar; Bjørge, Tone. (2024) Prevalence of drugs used for chronic conditions after diagnosis of thyroid cancer: a register-based cohort study. European Journal of Endocrinology (EJE)
  Vitenskapelig artikkel
• Høberg, André; Solberg, Berit Skretting; Hegvik, Tor-Arne; Haavik, Jan. (2024) Using polygenic scores in combination with symptom rating scales to identify attention-deficit/hyperactivity disorder. BMC Psychiatry
  Vitenskapelig artikkel

2023

• Paramsothy, Abira; Hegvik, Tor-Arne; Engeland, Anders; Bjørge, Tone; Egeland, Grace M.; Klungsøyr, Kari. (2023) Fetal Exposure to Preeclampsia and Later Risk of Cardiometabolic Disorders: A Population-Based Cohort Study. Hypertension
  Vitenskapelig artikkel

2022

• Hegvik, Tor-Arne; Klungsøyr, Kari; Kuja-Halkola, Ralf; Remes, Hanna; Haavik, Jan; D'Onofrio, Brian M.. (2022) Labor epidural analgesia and subsequent risk of offspring autism spectrum disorder and attention-deficit/hyperactivity disorder: a cross-national cohort study of 4.5 million individuals and their siblings. American Journal of Obstetrics and Gynecology
  Vitenskapelig artikkel

2021

• Fornæss, Katarina Mari; Nome, Pia Louise; Aakre, Elin Kismul; Hegvik, Tor-Arne; Jammer, Ib. (2021) Clinical frailty scale: Inter-rater reliability of retrospective scoring in emergency abdominal surgery. Acta Anaesthesiologica Scandinavica
  Vitenskapelig artikkel
• Hegvik, Tor-Arne; Chen, Qi; Kuja-Halkola, Ralf; Klungsøyr, Kari; Butwicka, Agnieszka; Lichtenstein, Paul. (2021) Familial co-Aggregation of attention-deficit/hyperactivity disorder and autoimmune diseases: A cohort study based on Swedish population-wide registers. International Journal of Epidemiology
  Vitenskapelig artikkel

2020

• Li, Lin; Lagerberg, Tyra; Chang, Zheng; Cortese, Samuele; Rosenqvist, Mina A.; Almqvist, Catarina. (2020) Maternal pre-pregnancy overweight/obesity and the risk of attention-deficit/hyperactivity disorder in offspring: a systematic review, meta-analysis and quasi-experimental family-based study. International Journal of Epidemiology
  Vitenskapelig artikkel
• Anderson, Anneli; Hegvik, Tor-Arne; Chen, Qi; Rosenqvist, Mina A; Kvalvik, Liv Grimstvedt; Almqvist, Catarina. (2020) Attention-deficit/hyperactivity disorder and smoking habits in pregnant women. PLOS ONE
  Vitenskapelig artikkel
• Solberg, Berit Skretting; Hegvik, Tor-Arne; Halmøy, Anne; Skjaerven, Rolv; Engeland, Anders; Haavik, Jan. (2020) Sex differences in parent–offspring recurrence of attention-deficit/hyperactivity disorder. Journal of Child Psychology and Psychiatry
  Vitenskapelig artikkel
• Li, Lin; Taylor, Mark J.; Bälter, Katarina; Kuja-Halkola, Ralf; Chen, Qi; Hegvik, Tor-Arne. (2020) Attention-deficit/hyperactivity disorder symptoms and dietary habits in adulthood: A large population-based twin study in Sweden. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics
  Vitenskapelig artikkel
• Mahootchi, Elaheh; Homaei, Selina Cannon; Kleppe, Rune; Winge, Ingeborg; Hegvik, Tor-Arne; Perez, Roberto Megias. (2020) GADL1 is a multifunctional decarboxylase with tissue-specific roles in β-alanine and carnosine production. Science Advances
  Vitenskapelig artikkel

2019

• Hegvik, Tor-Arne; Haavik, Jan. (2019) Attention-deficit/hyperactivity disorder and autoimmune diseases. Etiological relationships and therapeutic possibilities. Universitetet i Bergen Universitetet i Bergen
  Doktorgradsavhandling
• Hegvik, Tor-Arne; Waløen, Kai; Pandey, Sunil Kumar; Faraone, Stephen V.; Haavik, Jan; Zayats, Tetyana. (2019) Druggable genome in attention deficit/hyperactivity disorder and its co-morbid conditions. New avenues for treatment. Molecular Psychiatry
  Vitenskapelig artikkel

2018

• Chen, Qi; Hartman, Catharina A.; Haavik, Jan; Harro, Jaanus; Klungsøyr, Kari; Hegvik, Tor-Arne. (2018) Common psychiatric and metabolic comorbidity of adult attention-deficit/hyperactivity disorder: A population-based cross-sectional study. PLOS ONE
  Vitenskapelig artikkel

2017

• Hegvik, Tor-Arne; Instanes, Johanne Telnes; Haavik, Jan; Klungsøyr, Kari; Engeland, Anders. (2017) Associations between attention-deficit/hyperactivity disorder and autoimmune diseases are modified by sex: a population-based cross-sectional study. European Child and Adolescent Psychiatry
  Vitenskapelig artikkel
• Bjerkreim, Anna Therese; Hegvik, Tor-Arne; Guttormsen, Anne Berit. (2017) Vi må unngå at mennesker dør.
  Kronikk
• Hegvik, Tor-Arne; Instanes, Johanne Telnes; Haavik, Jan; Klungsøyr, Kari; Engeland, Anders. (2017) Correction to: Associations between attention-deficit/hyperactivity disorder and autoimmune diseases are modified by sex: a population-based cross-sectional study. European Child and Adolescent Psychiatry
  Errata

2016

• Hegvik, Tor-Arne; Jacobsen, Kaya Kvarme; Fredriksen, Mats; Zayats, Tetyana; Haavik, Jan. (2016) A candidate gene investigation of methylphenidate response in adult attention-deficit/hyperactivity disorder patients: results from a naturalistic study. Journal of Neural Transmission
  Vitenskapelig artikkel
• Hegvik, Tor-Arne; Valestrand, Eivind Alexander. (2016) Dagens studenter er fremtidens helseledere. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Leserinnlegg
• Klein, Marieke; Berger, Stefanie; Hoogman, Martine; Dammers, Janneke; Makinje, Remco; Heister, Angelien J.G.A.M.. (2016) Meta-analysis of the DRD5 VNTR in persistent ADHD. European Neuropsychopharmacology
  Vitenskapelig artikkel

2015

• Aarsland, Tore Ivar Malmei; Landaas, Elisabeth Toverud; Hegvik, Tor-Arne; Ulvik, Arve; Halmøy, Anne; Ueland, Per Magne. (2015) Serum concentrations of kynurenines in adult patients with attention-deficit hyperactivity disorder (ADHD): A case-control study. Behavioral and Brain Functions
  Vitenskapelig artikkel
• Landaas, Elisabeth Toverud; Hegvik, Tor-Arne; Halmøy, Anne; Ueland, Per Magne; Haavik, Jan. (2015) Serum concentrations of kynurenines in adult patients with attention-deficit hyperactivity disorder (ADHD): a case–control study. Behavioral and Brain Functions
  Vitenskapelig artikkel
• Haukanes, Bjørn Ivar; Hegvik, Tor-Arne; Eichler, Tilo Wolf; Haavik, Jan; Vedeler, Christian A.. (2015) Paraneoplastic syndrome-associated neuronal antibodies in adult ADHD. Journal of Neuroimmunology
  Vitenskapelig artikkel
• Hegvik, Tor-Arne; Haavik, Jan. (2015) Paraneoplastic syndrome-associated neuronal antibodies in adult ADHD. Elsevier Elsevier
  Mastergradsoppgave

2014

• Hegvik, Tor-Arne; Husebye, Eystein Sverre; Haavik, Jan. (2014) Autoantibodies targeting neurotransmitter biosynthetic enzymes in attention-deficit/hyperactivity disorder (ADHD). European Child and Adolescent Psychiatry
  Leserinnlegg

2011

• Haavik, Jan; Halmøy, Anne; Hegvik, Tor-Arne; Johansson, Stefan. (2011) Maternal genotypes as predictors of offspring mental health; the next frontier of genomic medicine?. Future Neurology
  Vitenskapelig oversiktsartikkel/review