2026

• Riise, Hedda Skogum; Thorvik, Helene; Øie, Lise Rystad; Stovner, Lars Jacob; Tronvik, Erling Andreas; Linde, Mattias; Hagen, Knut; Giri, Samita; Wergeland, Tore. (2026) The effects of angiotensin receptor blockers as prophylactic migraine treatment: A systematic review and meta-analysis. Cephalalgia
  Academic article
• Danelakis, Antonios; Abildsnes, Håkon Kvisle; Faisal, Fahim; Bjørk, Marte-Helene; Giles, Dominic; Hagen, Knut; Kumelj, Tjasa; Matharu, Manjit; Nachev, Parashkev; Tronvik, Erling Andreas. (2026) Machine Diagnostics and Machine Phenotyping of Migraine A HUNT Study. Neurology
  Academic article
• Møen, Einar Naveen; Bjørk, Marte-Helene; Gilhus, Nils Erik; Daltveit, Dagrun Slettebø; Contreras Estrada, Daniela; Hagen, Knut; Jayaraman, Mahendran; Khanevski, Andrej; Wergeland, Tore; Stubberud, Anker. (2026) The Prevalence and Incidence of Cluster Headache: A Norwegian Population-Based Time-Trend Study. Neurology
  Academic article
• Bjørnstadjordet, Mats; Kvernmo, Helene Ballo; Bråthen, Geir; Simpson, Melanie Rae; Sando, Sigrid Botne; Hagen, Knut; Devik, Kristina; Wergeland, Tore. (2026) Four decades of ALS care: a retrospective study of epidemiology, clinical course and changes in management. Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
  Academic article
• Hagen, Knut; Urfjell, Bente; Bäcklund, Nina. (2026) Observert samsvar i Norsk kvalitetsregister for alvorlige primære hodepiner. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article
• Møen, Einar Naveen; Bjørk, Marte-Helene; Gilhus, Nils Erik; Daltveit, Dagrun Slettebø; Contreras Estrada, Daniela; Hagen, Knut; Jayaraman, Mahendran; Khanevski, Andrej; Wergeland, Tore; Stubberud, Anker. (2026) Cluster headache and comorbidities, income and education: A nationwide registry-based matched cohort study. Cephalalgia
  Academic article

2025

• Faisal, Fahim; Danelakis, Antonios; Bjørk, Marte-Helene; Winsvold, Bendik Kristoffer Slagsvold; Matharu, Manjit; Nachev, Parashkev; Hagen, Knut; Tronvik, Erling Andreas; Stubberud, Anker. (2025) Prediction of new-onset migraine using clinical-genotypic data from the HUNT Study: a machine learning analysis. The Journal of Headache and Pain
  Academic article

2024

• Giri, Samita; Tronvik, Erling Andreas; Dalen, Håvard; Ellekjær, Hanne; Olsen, Alexander; Hagen, Knut. (2024) Headache disorders and risk of stroke. A register-linked HUNT study. Cephalalgia Reports
  Academic article
• Hagen, Knut. (2024) One-year prevalence of cluster headache, hemicrania continua, paroxysmal hemicrania and SUNCT in Norway: a population-based nationwide registry study. The Journal of Headache and Pain
  Academic article
• Engstrand, Helene; Revdal, Eline; Argren, Maria Bengtson Argren; Hagen, Knut; Zwart, John Anker Henrik; Brodtkorb, Eylert; Winsvold, Bendik Kristoffer Slagsvold. (2024) Relationship between migraine and epilepsy in a large population-based cohort: The HUNT Study. European Journal of Neurology
  Academic article
• Filosa, James; Omland, Petter Moe; Hagen, Knut; Langsrud, Knut; Engstrøm, Morten; Sand, Trond Halfdan. (2024) Validation of Trøndelag Apnoea Score Proxy for Obstructive Sleep Apnoea in the General Population of Norway: The HUNT Study. Sleep Disorders
  Academic article
• Giri, Samita; Tronvik, Erling Andreas; Dalen, Håvard; Ellekjær, Hanne; Loennechen, Jan Pål; Olsen, Alexander; Hagen, Knut. (2024) Migraine and risk of atrial fibrillation: A 9-year follow-up based on the Trøndelag Health Study. Cephalalgia
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John Anker Henrik. (2024) Overweight and obesity as risk factors for chronic low back pain: a new follow-up in the HUNT Study. BMC Public Health
  Academic article
• Hagen, Knut; Winsvold, Bendik Kristoffer Slagsvold; Bjørk, Marte-Helene; Tronvik, Erling Andreas; Bratterud, Laila Bratterud; Ofte, Hilde Karen; Lundqvist, Christofer; Sønnervik, Julie; Bäcklund, Nina. (2024) Oppfølgingen ved ensidig hodepine med autonome symptomer kan bli bedre. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Professional article
• Neverdahl, Jan Petter; Uglem, Martin; Matre, Dagfinn; Nilsen, Kristian Bernhard; Hagen, Knut; Gravdahl, Gøril Bruvik; Sand, Trond Halfdan; Omland, Petter Moe. (2024) Endogenous pain modulation after sleep restriction in migraine: a blinded crossover study. The Journal of Headache and Pain
  Academic article

2023

• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik. (2023) Menopausal hormone therapy, oral contraceptives and risk of chronic low back pain: the HUNT Study. BMC Musculoskeletal Disorders
  Academic article
• Giri, Samita; Tronvik, Erling Andreas; Linde, Anders Mattias; Pedersen, Sindre Andre; Hagen, Knut. (2023) Randomized controlled studies evaluating Topiramate, Botulinum toxin type A, and mABs targeting CGRP in patients with chronic migraine and medication overuse headache: A systematic review and meta-analysis. Cephalalgia
  Academic article
• Jacobsen, Kaya Kvarme; Børte, Sigrid; Laborie, Lene Bjerke; Kristiansen, Hege; Schäfer, Annette; Martinsen, Amy; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen J; Fors, Egil Andreas. (2023) COL11A1 is associated with developmental dysplasia of the hip and secondary osteoarthritis in the HUNT study. Osteoarthritis and Cartilage Open
  Academic article

2022

• Giri, Samita; Tronvik, Erling Andreas; Hagen, Knut. (2022) The bidirectional temporal relationship between headache and affective disorders: longitudinal data from the HUNT studies. The Journal of Headache and Pain
  Academic article
• Bahrami, Shahram; Hindley, Guy Frederick Lanyon; Winsvold, Bendik K S; O'Connell, Kevin Sean; Frei, Oleksandr; Shadrin, Alexey; Cheng, Weiqiu; Bettella, Francesco; Rødevand, Linn; Ødegaard, Ketil Joachim. (2022) Dissecting the shared genetic basis of migraine and mental disorders using novel statistical tools. Brain
  Academic article
• Hautakangas, Heidi; Winsvold, Bendik K S; Ruotsalainen, Sanni; Bjornsdottir, Gyda; Harder, Aster V. E.; Kogelman, Lisette J. A.; Thomas, Laurent; Noordam, Raymond; Benner, Christian; Gormley, Padhraig. (2022) Genome-wide analysis of 102,084 migraine cases identifies 123 risk loci and subtype-specific risk alleles. Nature Genetics
  Academic article
• Giri, Samita; Tronvik, Erling Andreas; Linde, Mattias; Hagen, Knut. (2022) The impact of topiramate, botulinum toxin type A, and CGRP-antibodies on medication overuse headache in patients with chronic migraine: A protocol for systematic review and meta-analysis. Cephalalgia Reports
  Academic article
• Stovner, Lars Jacob; Hagen, Knut; Tronvik, Erling Andreas; Gravdahl, Gøril Bruvik; Burstein, Rami; Dodick, David W.. (2022) FollowTheSutures: Piloting a new way to administer onabotulinumtoxinA for chronic migraine. Cephalalgia
  Academic article
• Stovner, Lars Jacob; Hagen, Knut; Linde, Mattias; Steiner, Timothy J.. (2022) The global prevalence of headache: an update, with analysis of the influences of methodological factors on prevalence estimates. The Journal of Headache and Pain
  Academic article
• Mishra, Aniket; Malik, Rainer; Hachiya, Tsuyoshi; Jürgenson, Tuuli; Namba, Shinichi; Posner, Daniel C.; Kamanu, Frederick K.; Koido, Masaru; Grand, Quentin Le; Shi, Mingyang. (2022) Publisher Correction: Stroke genetics informs drug discovery and risk prediction across ancestries. Nature
  Corrigendum
• Mishra, Aniket; Malik, Rainer; Hachiya, Tsuyoshi; Jürgenson, Tuuli; Namba, Shinichi; Posner, Daniel C.; Kamanu, Frederick K.; Koido, Masaru; Grand, Quentin Le; Shi, Mingyang. (2022) Stroke genetics informs drug discovery and risk prediction across ancestries. Nature
  Academic article
• Filosa, James; Omland, Petter Moe; Hagen, Knut; Langsrud, Knut; Brenner, Eiliv; Knutsen, Andreas; Drange, Ole Kristian; Gravdahl, Gøril Bruvik; Stjern, Marit; Engstrøm, Morten. (2022) Validation of questionnaires for restless legs syndrome in the general population: the Trøndelag Health Study (HUNT). Journal of Sleep Research
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik. (2022) Does the risk of chronic low back pain depend on age at menarche or menopause? A population-based cross-sectional and cohort study: the Trøndelag Health Study. BMJ Open
  Academic article

2021

• Rahman, Shafiqur; Winsvold, Bendik K S; Chavez, Sergio; Børte, Sigrid; Tsepilov, Vakov; Sharapov, Sodbo Zh; Martinsen, Amy; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen. (2021) Genome-wide association study identifies RNF123 locus as associated with chronic widespread musculoskeletal pain. Annals of the Rheumatic Diseases
  Academic article
• Dahl, Astri Grøtan; Havang, Sara; Hagen, Knut. (2021) Reliability of a self-administrated musculoskeletal questionnaire: The fourth Trøndelag health study. Musculoskeletal Science and Practice
  Academic article
• Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Hagen, Knut; Mork, Paul Jarle. (2021) Long‐term changes in self‐reported sleep quality and risk of chronic musculoskeletal pain: The HUNT Study. Journal of Sleep Research
  Academic article
• Freidin, Maxim B.; Tsepilov, Yakov A.; Stanaway, Ian B.; Meng, Weihua; Hayward, Caroline; Smith, Blair H.; Khoury, Samar; Parisien, Marc; Bortsov, Andrey; Diatchenko, Luda. (2021) Sex- and age-specific genetic analysis of chronic back pain. Pain
  Academic article
• Khoury, Samar; Parisien, Marc; Thompson, Scott J.; Vachon-Presseau, Etienne; Roy, Mathieu; Mitchell, Amy; Winsvold, Bendik K S; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen J.. (2021) Genome-wide analysis identifies impaired axonogenesis in chronic overlapping pain conditions. Brain
  Academic article
• Lyngbakken, Magnus Nakrem; Paulsen, Aksel; Sethupathy, Ashwini; Hesselberg, Øyvind; Grimsgaard, Sameline; Hagen, Knut. (2021) Pragmatiske studier – hva er det?. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article

2020

• Hagen, Knut; Stovner, Lars Jacob; Zwart, John-Anker. (2020) High sensitivity C-reactive protein and risk of migraine in a 11-year follow-up with data from the Nord-Trøndelag health surveys 2006–2008 and 2017–2019. The Journal of Headache and Pain
  Academic article
• Filosa, James; Omland, Petter Moe; Langsrud, Knut; Hagen, Knut; Engstrøm, Morten; Drange, Ole Kristian; Knutsen, Andreas; Brenner, Eiliv; Kallestad, Håvard; Sand, Trond. (2020) Validation of insomnia questionnaires in the general population: The Nord-Trøndelag Health Study (HUNT). Journal of Sleep Research
  Academic article
• Kristoffersen, Espen Saxhaug; Børte, Sigrid; Hagen, Knut; Zwart, John-Anker; Winsvold, Bendik K S. (2020) Caesarean section and the association with migraine: a retrospective register-linked HUNT population cohort study. BMJ Open
  Academic article
• Kristoffersen, Espen Saxhaug; Børte, Sigrid; Hagen, Knut; Zwart, John-Anker; Winsvold, Bendik K S. (2020) Migraine, obesity and body fat distribution - a population-based study. The Journal of Headache and Pain
  Academic article
• Skarpsno, Eivind S.; Mork, Paul Jarle; Hagen, Knut; Nilsen, Tom Ivar Lund; Marcuzzi, Anna. (2020) Number of Chronic Nighttime Insomnia Symptoms and Risk of Chronic Widespread Pain and Pain-Related Disability: The HUNT Study. Nature and Science of Sleep
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Zwart, John-Anker. (2020) Time trends of major headache diagnoses and predictive factors. Data from three Nord-Trøndelag health surveys. The Journal of Headache and Pain
  Academic article
• Zwart, John-Anker; Stovner, Lars Jacob; Linde, Mattias; Hagen, Knut. (2020) Verdien av å følge utbredelsen av hodepine i en befolkning gjennom mer enn 20 år: HUNT2, 3 og 4. Best practice psykiatri /nevrologi
  Popular science article
• Hagen, Knut; Håberg, Asta; Husøy, Andreas Kattem. (2020) Headache and brain morphology in the general middle-aged population. Norges teknisk-naturvitenskapelige universitet
  Doctoral thesis
• Børte, Sigrid; Zwart, John-Anker; Skogholt, Anne Heidi; Gabrielsen, Maiken Elvestad; Thomas, Laurent; Fritsche, Lars; Surakke, Ida; Nielsen, Jonas B.; Zhou, Wei; Wolford, Brooke. (2020) Mitochondrial genome-wide association study of migraine – the HUNT Study. Cephalalgia
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John-Anker. (2020) Associations between the number of children, age at childbirths and prevalence of chronic low back pain: the Nord- Trøndelag Health Study. BMC Public Health
  Academic article

2019

• Hagen, Knut; Hopstock, Laila Arnesdatter; Eggen, Anne Elise; Mathiesen, Ellisiv B.; Nilsen, Kristian Bernhard. (2019) Does insomnia modify the association between C-reactive protein and migraine? The Tromsø Study 2015-2016. Cephalalgia
  Academic article
• Hagen, Knut; Stovner, Lars Jacob. (2019) Headache in the HUNT Study: Analytical Headache Epidemiology as a Source of Added Knowledge.
  Non-fiction chapter
• Hagen, Knut; Åsberg, Anders Nikolai; Uhlig, Benjamin Langsæter; Tronvik, Erling Andreas; Brenner, Eiliv; Sand, Trond. (2019) The HUNT4 study: the validity of questionnaire-based diagnoses. The Journal of Headache and Pain
  Academic article
• Jenssen, Astrid Bjørke; Stovner, Lars Jacob; Tronvik, Erling Andreas; Sand, Trond; Helde, Grethe; Gravdahl, Gøril Bruvik; Hagen, Knut. (2019) The crossover design for migraine preventives: an analyses of four randomized placebo-controlled trials. The Journal of Headache and Pain
  Academic article
• Husøy, Andreas Kattem; Eikenes, Live; Håberg, Asta; Hagen, Knut; Stovner, Lars Jacob. (2019) Diffusion tensor imaging in middle-aged headache sufferers in the general population: A cross-sectional population-based imaging study in the Nord-Trøndelag health study (HUNT-MRI). The Journal of Headache and Pain
  Academic article
• Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Sand, Trond; Hagen, Knut; Mork, Paul Jarle. (2019) Work-Related Mental Fatigue, Physical Activity and Risk of Insomnia Symptoms: Longitudinal Data from the Norwegian HUNT Study. Behavioral Sleep Medicine
  Academic article
• Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Sand, Trond; Hagen, Knut; Mork, Paul Jarle. (2019) The joint effect of insomnia symptoms and lifestyle factors on risk of self-reported fibromyalgia in women: longitudinal data from the HUNT Study. BMJ Open
  Academic article
• Uhlig, Benjamin Langsæter; Hagen, Knut; Sand, Trond. (2019) The epidemiology of INSOMNIA in the Nord-Trøndelag Health Study. Norges teknisk-naturvitenskapelige universitet
  Doctoral thesis
• Skarpsno, Eivind S.; Mork, Paul Jarle; Nilsen, Tom Ivar Lund; Hagen, Knut; Sand, Trond. (2019) The bidirectional association between sleep problems and chronic musculoskeletal pain: influence of lifestyle, physical work exposure and systemic inflammation. NTNU Grafisk senter
  Doctoral thesis
• Hagen, Knut; Stovner, Lars Jacob; Nilsen, Kristian Bernhard; Kristoffersen, Espen Saxhaug; Winsvold, Bendik K S. (2019) The impact of C-reactive protein levels on headache frequency in the HUNT study 2006-2008. BMC Neurology
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker. (2019) Does diabetes influence the probability of experiencing chronic low back pain? A population-based cohort study: the Nord-Trøndelag Health Study. BMJ Open
  Academic article
• Hagen, Knut. (2019) Validering av spørreskjemabaserte hodepinediagnoser i HUNT-undersøkelsen. Best Practice Psykiatri/Nevrologi
  Popular science article
• Børte, Sigrid; Zwart, John-Anker; Stensland, Synne; Hagen, Knut; Winsvold, Bendik K S. (2019) Parental migraine in relation to migraine in offspring: Family linkage analyses from the HUNT Study. Cephalalgia
  Academic article
• Husøy, Andreas Kattem; Håberg, Asta Kristine; Rimol, Lars Morten; Hagen, Knut; Vangberg, Torgil Riise; Stovner, Lars Jacob. (2019) Cerebral cortical dimensions in headache sufferers aged 50-66 years: a population-based imaging study in the Nord-Trondelag Health Study (HUNT-MRI). Pain
  Academic article
• Nordhaug, Lena Hoem; Linde, Mattias; Vik, Anne; Hagen, Knut; Stovner, Lars Jacob. (2019) Headache Attributed to Traumatic Injury to the Head: Epidemiological Evidence and Natural Course. Norges teknisk-naturvitenskapelige universitet
  Doctoral thesis
• Aamodt, Anne Hege; Bjørk, Marte-Helene; Alstadhaug, Karl Bjørnar; Eldøen, Guttorm; Dueland, Aud Nome; Poole, Tine; Hagen, Knut; Vetvik, Kjersti; Ofte, Hilde Karen; Sønnervik, Julie. (2019) Praktisk håndtering av hodepine. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic literature review

2018

• Husøy, Andreas Kattem; Pintzka, Carl Wolfgang Schøyen; Eikenes, Live; Håberg, Asta; Hagen, Knut; Linde, Mattias; Stovner, Lars Jacob. (2018) Volume and shape of subcortical grey matter structures related to headache: A cross-sectional population-based imaging study in the Nord-Trøndelag Health Study. Cephalalgia
  Academic article
• Uhlig, Benjamin Langsæter; Hagen, Knut; Engstrøm, Morten; Stjern, Marit; Gravdahl, Gøril Bruvik; Sand, Trond. (2018) The relationship between obstructive sleep apnea and insomnia: a population-based cross-sectional polysomnographic study. Sleep Medicine
  Academic article
• Hagen, Knut; Kristoffersen, Espen Saxhaug; Winsvold, Bendik K S; Stovner, Lars Jacob; Zwart, John-Anker. (2018) Remission of chronic headache: An 11-year follow-up study. Data from the Nord-Trøndelag Health Surveys 1995–1997 and 2006–2008. Cephalalgia
  Academic article
• Hagen, Knut; Åsberg, Anders Nikolai; Stovner, Lars Jacob; Linde, Mattias; Zwart, John-Anker; Winsvold, Bendik K S; Heuch, INGRID. (2018) Lifestyle factors and risk of migraine and tension-type headache. Follow-up data from the Nord-Trøndelag Health Surveys 1995-1997 and 2006-2008. Cephalalgia
  Academic article
• Honningsvåg, Lasse-Marius; Håberg, Asta; Hagen, Knut; Kvistad, Kjell Arne; Stovner, Lars Jacob; Linde, Mattias. (2018) White matter hyperintensities and headache: A population-based imaging study (HUNT MRI). Cephalalgia
  Academic article
• Hagen, Knut; Åsberg, Anders Nikolai; Uhlig, Benjamin Langsæter; Tronvik, Erling Andreas; Brenner, Eiliv; Stjern, Marit; Helde, Grethe; Gravdahl, Gøril Bruvik; Sand, Trond. (2018) The epidemiology of headache disorders: a face-to-face interview of participants in HUNT4. The Journal of Headache and Pain
  Academic article
• Uhlig, Benjamin Langsæter; Sand, Trond; Nilsen, Tom Ivar Lund; Mork, Paul Jarle; Hagen, Knut. (2018) Insomnia and risk of chronic musculoskeletal complaints: longitudinal data from the HUNT study, Norway. BMC Musculoskeletal Disorders
  Academic article
• Nordhaug, Lena Hoem; Hagen, Knut; Vik, Anne; Stovner, Lars Jacob; Follestad, Turid; Pedersen, Torunn; Gravdahl, Gøril Bruvik; Linde, Mattias. (2018) Headache following head injury: a population-based longitudinal cohort study (HUNT). The Journal of Headache and Pain
  Academic article
• Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Sand, Trond; Hagen, Knut; Mork, Paul Jarle. (2018) Physical work exposure, chronic musculoskeletal pain and risk of insomnia: longitudinal data from the HUNT study, Norway. Occupational and Environmental Medicine
  Academic article
• Johnsen, Marianne Bakke; Winsvold, Bendik K S; Børte, Sigrid; Vie, Gunnhild Åberge; Pedersen, Linda Margareth; Storheim, Kjersti; Skorpen, Frank; Hagen, Knut; Bjørngaard, Johan Håkon; Åsvold, Bjørn Olav. (2018) The causal role of smoking on the risk of headache. A Mendelian randomization analysis in the HUNT Study. European Journal of Neurology
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker. (2018) Is chronic low back pain a risk factor for diabetes? The Nord-Trøndelag Health Study. BMJ Open Diabetes Research & Care
  Academic article
• Åsberg, Anders Nikolai; Hagen, Knut; Stovner, Lars Jacob; Heuch, INGRID; Zwart, John-Anker; Winsvold, Bendik K S. (2018) Do incident musculoskeletal complaints influence mortality? The Nord-Trøndelag Health study. PLOS ONE
  Academic article

2017

• Hansen, Aleksander Grande; Stovner, Lars Jacob; Hagen, Knut; Helvik, Anne-Sofie; Thorstensen, Wenche Moe; Nordgård, Ståle; Bugten, Vegard; Eggesbø, Heidi Beate. (2017) Paranasal sinus opacification in headache sufferers: A population-based imaging study (the HUNT study-MRI). Cephalalgia
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Mai, Xiao-Mei; Langhammer, Arnulf; Zwart, John-Anker. (2017) Is there an Association between vitamin D status and risk of chronic low bak pain? A nested case-Control analysis in the Nord-Trøndelag Health Study. BMJ Open
  Academic article
• Uglem, Martin; Omland, Petter Moe; Nilsen, Kristian Bernhard; Tronvik, Erling Andreas; Stovner, Lars Jacob; Hagen, Knut; Linde, Anders Mattias; Sand, Trond Halfdan. (2017) Does pain sensitivity change by migraine phase? A blinded longitudinal study. Cephalalgia
  Academic article
• Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Sand, Trond; Hagen, Knut; Mork, Paul Jarle. (2017) Do physical activity and body mass index modify the association between chronic musculoskeletal pain and insomnia? Longitudinal data from the HUNT study, Norway. Journal of Sleep Research
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2017) Physical activity level at work and risk of chronic low back pain: A follow-up in the Nord-Trøndelag Health Study. PLOS ONE
  Academic article
• Hagen, Knut; Åsvold, Bjørn Olav; Midthjell, Kristian; Stovner, Lars Jacob; Zwart, John-Anker; Linde, Mattias. (2017) Inverse relationship between type 1 diabetes mellitus and migraine. Data from the Nord-Trøndelag Health Surveys 1995-1997 and 2006-2008. Cephalalgia
  Academic article

2016

• Nordhaug, Lena Hoem; Vik, Anne; Hagen, Knut; Stovner, Lars Jacob; Pedersen, Torunn; Gravdahl, Gøril Bruvik; Linde, Mattias. (2016) Headaches in patients with previous head injuries: A population-based historical cohort study (HUNT). Cephalalgia
  Academic article
• Skramm, S; Uluduz, Derja; Gouveia, Raquel Gil; Jensen, Rigmor Højland; Siva, Aksel; Uygunoglu, Ugur; Gvantsa, Gorgadze; Mania, Maka; Braschinsky, Mark; Filatova, Elena. (2016) Headache service quality: evaluation of quality indicators in 14 specialist-care centres. The Journal of Headache and Pain
  Academic article
• Honningsvåg, Lasse-Marius; Hagen, Knut; Håberg, Asta; Stovner, Lars Jacob; Linde, Mattias. (2016) Intracranial abnormalities and headache: A population-based imaging study (HUNT MRI). Cephalalgia
  Academic article
• Uglem, Martin; Omland, Petter Moe; Engstrøm, Morten; Gravdahl, Gøril Bruvik; Linde, Mattias; Hagen, Knut; Sand, Trond. (2016) Non-invasive cortical modulation of experimental pain in migraine. Clinical Neurophysiology
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2016) Is there a U-shaped relationship between physical activity in leisure time and risk of chronic low back pain? A follow-up in the HUNT Study. BMC Public Health
  Academic article
• Larsen, Joakim Schjølberg; Skaug, Eli-Anne; Wisløff, Ulrik; Ellingsen, Øyvind; Stovner, Lars Jacob; Linde, Mattias; Hagen, Knut. (2016) Migraine and endothelial function: The HUNT3 Study. Cephalalgia
  Academic article
• Åsberg, Anders Nikolai; Stovner, Lars Jacob; Zwart, John-Anker; Winsvold, Bendik K S; Heuch, INGRID; Hagen, Knut. (2016) Chronic musculoskeletal complaints as a predictor of mortality - The HUNT study. Pain
  Academic article
• Kvalheim, Synnøve Kristin; Sandvik, Leiv; Winsvold, Bendik K S; Hagen, Knut; Zwart, John-Anker. (2016) Early menarche and chronic widespread musculoskeletal complaints- Results from the HUNT study. European Journal of Pain
  Academic article
• Åsberg, Anders Nikolai; Heuch, INGRID; Hagen, Knut. (2016) The mortality associated with chronic widespread musculoskeletal complaints: a systematic review of the literature. Musculoskeletal Care
  Academic literature review
• Omland, Petter Moe; Uglem, Martin; Hagen, Knut; Linde, Mattias; Tronvik, Erling Andreas; Sand, Trond. (2016) Visual evoked potentials in migraine: Is the "neurophysiological hallmark" concept still valid?. Clinical Neurophysiology
  Academic article
• Husøy, Andreas Kattem; Indergaard, Marit Kristina; Honningsvåg, Lasse-Marius; Håberg, Asta; Hagen, Knut; Linde, Mattias; Gårseth, Mari; Stovner, Lars Jacob. (2016) Perivascular spaces and headache: A population-based imaging study (HUNT-MRI). Cephalalgia
  Academic article
• Laurell, Katarina; Arttro, Ville; Bendtsen, Lars; Hagen, Knut; Häggström, Johan; Linde, Mattias; Søderstrøm, Lars; Tronvik, Erling Andreas; Wessmann, Maija; Zwart, John-Anker. (2016) Premonitory symptoms in migraine: A cross-sectional study in 2714 persons. Cephalalgia
  Academic article

2015

• Hagen, Knut; Wisløff, Ulrik; Ellingsen, Øyvind; Stovner, Lars Jacob; Linde, Mattias. (2015) Headache and peak oxygen uptake: The HUNT3 study. Cephalalgia
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2015) A comparison of anthropometric measures for assessing the association between body size and risk of chronic low back pain: The HUNT study. PLOS ONE
  Academic article
• Røttereng, Ane Karoline Stræte; Bosnes, Ole; Stordal, Eystein; Zwart, John-Anker; Linde, Mattias; Stovner, Lars Jacob; Hagen, Knut. (2015) Headache as a predictor for dementia: The HUNT Study. The Journal of Headache and Pain
  Academic article
• Åsberg, Anders Nikolai; Stovner, Lars Jacob; Zwart, John-Anker; Winsvold, Bendik K S; Heuch, INGRID; Hagen, Knut. (2015) Migraine as a predictor of mortality: The HUNT study. Cephalalgia
  Academic article
• Hagen, Knut; Brenner, Eiliv; Linde, Mattias; Gravdahl, Gøril Bruvik; Tronvik, Erling; Engstrøm, Morten; Sonnewald, Ursula; Helde, Grethe; Stovner, Lars Jacob; Sand, Trond. (2015) Acetyl-l-carnitine versus placebo for migraine prophylaxis: A randomized, triple-blind, crossover study. Cephalalgia
  Academic article
• Nordhaug, Lena Hoem; Vik, Anne; Linde, Mattias; Stovner, Lars Jacob; Hagen, Knut. (2015) Headache related to prevoius head injury. NTNU
  Master thesis
• Blaauw, Brit Andenes; Dyb, Grete; Hagen, Knut; Holmen, Turid Lingaas; Linde, Mattias; Wentzel-Larsen, Tore; Zwart, John-Anker. (2015) The relationship of anxiety, depression and behavioral problems with recurrent headache in late adolescence - a Young-HUNT follow-up study. The Journal of Headache and Pain
  Academic article
• Fagernæs, Carl Fredrik; Heuch, INGRID; Zwart, John-Anker; Winsvold, Bendik Kristoffer Slagsvold; Linde, Mattias; Hagen, Knut. (2015) Blood pressure as a risk factor for headache and migraine: A prospective population-based study. European Journal of Neurology
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2015) Association between body height and chronic low back pain: a follow-up in the Nord-Trøndelag Health Study. BMJ Open
  Academic article

2014

• Hagen, Knut; Stordal, Eystein; Linde, Mattias; Steiner, Timothy J.; Zwart, John-Anker; Stovner, Lars Jacob. (2014) Headache as a risk factor for dementia: A prospective population-based study. Cephalalgia
  Academic article
• Stovner, Lars Jacob; Linde, Mattias; Gravdahl, Gøril Bruvik; Tronvik, Erling; Aamodt, Anne Hege; Sand, Trond; Hagen, Knut. (2014) A comparative study of candesartan versus propranolol for migraine prophylaxis: A randomised, triple-blind, placebo-controlled, double cross-over study. Cephalalgia
  Academic article
• Uhlig, Benjamin Langsæter; Sand, Trond; Ødegård, Siv Steinsmo; Hagen, Knut. (2014) Prevalence and associated factors of DSM-V insomnia in Norway: The Nord-Trøndelag Health Study (HUNT 3). Sleep Medicine
  Academic article
• Tronvik, Erling; Sørensen, Torgeir; Linde, Mattias; Bendtsen, Lars; Artto, Ville; Laurell, Katarina; Kallela, Mikko; Zwart, John-Anker; Hagen, Knut. (2014) The relationship between headache and religious attendance (the Nord-Trøndelag health study-HUNT). The Journal of Headache and Pain
  Academic article
• Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Stovner, Lars Jacob; Stjern, Marit; Sand, Trond. (2014) Sleep quality, arousal and pain thresholds in tension-type headache: A blinded controlled polysomnographic study. Cephalalgia
  Academic article
• Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Stovner, Lars Jacob; Sand, Trond. (2014) Sleep quality and arousal in migraine and tension-type headache: The headache-sleep study. Acta Neurologica Scandinavica, Supplementum
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2014) Does high blood pressure reduce the risk of chronic low back pain? The Nord-Trøndelag Health Study. European Journal of Pain
  Academic article
• Omland, Petter Moe; Uglem, Martin; Engstrøm, Morten; Linde, Mattias; Hagen, Knut; Sand, Trond. (2014) Modulation of visual evoked potentials by high-frequency repetitive transcranial magnetic stimulation in migraineurs. Clinical Neurophysiology
  Academic article
• Uhlig, Benjamin Langsæter; Engstrøm, Morten; Ødegård, Siv Steinsmo; Hagen, Knut; Sand, Trond. (2014) Headache and insomnia in population-based epidemiological studies. Cephalalgia
  Academic article
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2014) Do abnormal serum lipid levels increase the risk of chronic low back pain? The Nord-Trøndelag Health Study. PLOS ONE
  Academic article
• Blaauw, Brit Andenes; Dyb, Grete; Hagen, Knut; Holmen, Turid Lingaas; Linde, Mattias; Wentzel-Larsen, Tore; Zwart, John-Anker. (2014) Anxiety, depression and behavioral problems among adolescents with recurrent headache: the Young-HUNT study. The Journal of Headache and Pain
  Academic article

2013

• Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Sand, Trond. (2013) Answer to comment on "sleep quality, arousal and pain thresholds in migraineurs: a blinded controlled polysomnographic study". The Journal of Headache and Pain
  Commentary
• Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Gravdahl, Gøril Bruvik; Sand, Trond. (2013) Sleep-related and non-sleep-related migraine: interictal sleep quality, arousals and pain thresholds. The Journal of Headache and Pain
  Academic article
• Omland, Petter Moe; Uglem, Martin; Engstrøm, Morten; Linde, Mattias; Hagen, Knut; Sand, Trond. (2013) Cortical Modulation Affects Visual Evoked Potentials Differently in Migraineurs Compared to Healthy Controls. Cephalalgia
  Conference abstract
• Heuch, INGRID; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2013) Body Mass Index as a Risk Factor for Developing Chronic Low Back Pain A Follow-up in the Nord-Trøndelag Health Study. Spine
  Academic article
• Ødegård, Siv Steinsmo; Sand, Trond; Engstrøm, Morten; Zwart, John-Anker; Hagen, Knut. (2013) The impact of headache and chronic musculoskeletal complaints on the risk of insomnia: longitudinal data from the Nord-Trondelag health study. The Journal of Headache and Pain
  Academic article
• Hagen, Knut. (2013) Midler ved migrene.
  Academic chapter
• Hagen, Knut. (2013) Hodepine og ansiktsmerter.
  Academic chapter
• Hagen, Knut. (2013) Nytt om kronisk daglig hodepine - risikofaktorer og behandling. Skruestikka, medlemsblad for Norges Migreneforbund
  Popular science article
• Stovner, Lars Jacob; Linde, Mattias; Gravdahl, Gøril Bruvik; Erling, T.; Aamodt, Anne Hege; Sand, Trond; Hagen, Knut. (2013) Candesartan Versus Propranolol for Migraine Prophylaxis: A Randomized, Triple-Blind, Placebo-Controlled, Double Crossover Study. Cephalalgia
  Conference abstract
• Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Stovner, Lars Jacob; Gravdahl, Gøril Bruvik; Stjern, Marit; Sand, Trond. (2013) Sleep quality, arousal and pain thresholds in migraineurs: a blinded controlled polysomnographic study. The Journal of Headache and Pain
  Academic article
• Omland, Petter Moe; Nilsen, Kristian Bernhard; Uglem, Martin; Gravdahl, Gøril Bruvik; Linde, Mattias; Hagen, Knut; Sand, Trond. (2013) Visual Evoked Potentials in Interictal Migraine: No Confirmation of Abnormal Habituation. Headache
  Academic article
• Kvalheim, Synnøve Kristin; Sandven, Irene; Hagen, Knut; Zwart, John-Anker. (2013) Smoking as a risk factor for chronic musculoskeletal complaints is influenced by age. The HUNT Study. Pain
  Academic article
• Winsvold, Bendik Kristoffer Slagsvold; Sandven, Irene; Hagen, Knut; Linde, Mattias; Midthjell, Kristian; Zwart, John-Anker. (2013) Migraine, headache and development of metabolic syndrome: An 11-year follow-up in the Nord-Trondelag Health Study (HUNT). Pain
  Academic article

2012

• Hagen, Knut. (2012) Nytt om kronisk daglig hodepine - risikofaktorer og behandling. Bestpractice : dialog mellom leger
  Professional article
• Honningsvåg, Lasse-Marius; Linde, Mattias; Håberg, Asta; Stovner, Lars Jacob; Hagen, Knut. (2012) Does health differ between participants and non-participants in the MRI-HUNT study, a population based neuroimaging study? The Nord-Trøndelag health studies 1984-2009. BMC Medical Imaging
  Academic article
• Linde, Mattias; Langnes, Helge Andrè; Hagen, Knut; Bergh, Kåre; Stovner, Lars Jacob. (2012) No increase in headache after previous intracranial infections: a historical cohort study (HUNT). European Journal of Neurology
  Academic article
• Stovner, Lars Jacob; Tronvik, Erling; Hagen, Knut. (2012) Medikamentell forebygging ved migrene. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article
• Jacobsen, Brit Andenes; Dyb, Grete; Hagen, Knut; Holmen, Turid Lingaas; Linde, Mattias; Zwart, John-Anker. (2012) Headache and mental health among adolescents. European Journal of Neurology
  Conference abstract
• Engstrom, M; Hagen, Knut; Bjørk, Marte Helene; Stovner, Lars Jacob; Gravdahl, Gøril Bruvik; Stjern, Marit; Sand, Trond. (2012) Subjective and objective sleep quality related to pain thresholds in tension type headache and controls. Journal of Sleep Research
  Conference abstract
• Stovner, Lars Jacob; Tronvik, Erling; Hagen, Knut. (2012) Medikamentell profylakse ved migrene. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Professional article
• Ødegård, Siv Steinsmo; Sand, Trond; Engstrøm, Morten; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut. (2012) Headache, chronic musculoskeletal pain and risk of insomnia: longitudinal data from the Nord-Trondelag Health Study. Journal of Sleep Research
  Conference abstract
• Hagen, Knut; Linde, Mattias; Steiner, Timothy J.; Stovner, Lars Jacob; Zwart, John-Anker. (2012) Risk factors for medication-overuse headache: An 11-year follow-up study. The Nord-Trøndelag Health Studies. Pain
  Academic article
• Hagen, Knut; Linde, Mattias; Steiner, Timothy J.; Zwart, John-Anker; Stovner, Lars Jacob. (2012) The bidirectional relationship between headache and chronic musculoskeletal complaints: an 11-year follow-up in the Nord-Trøndelag Health Study (HUNT). European Journal of Neurology
  Academic article

2011

• Hagen, Knut; Stovner, Lars Jacob. (2011) A randomized controlled trial on medication-overuse headache: outcome after 1 and 4 years. Acta Neurologica Scandinavica
  Academic article
• Stovner, Lars Jacob; Hagen, Knut; Tronvik, Erling. (2011) The relationship between BP and pain: The Nord-Trøndelag Health Survey. Advances in Clinical Neuroscience & Rehabilitation
  Academic article
• Hagen, Knut; Linde, Mattias; Heuch, INGRID; Stovner, Lars Jacob; Zwart, John-Anker. (2011) Increasing Prevalence of Chronic Musculoskeletal Complaints. A Large 11-Year Follow-Up in the General Population (HUNT 2 and 3). Pain medicine (Malden, Mass.)
  Academic article
• Stovner, Lars Jacob; Hagen, Knut; Burstein, Rami. (2011) Migraine and Other Pain Disorders.
  Academic chapter
• Jacobsena, Brit A.; Dyb, Grete; Hagen, Knut; Stovner, Lars Jacob; Holmen, Turid L.; Zwart, John-Anker. (2011) The Nord-Trøndelag Health Study shows increased prevalence of primary recurrent headaches among adolescents over a four-year period. Scandinavian Journal of Pain
  Academic article
• Tronvik, Erling; Zwart, John-Anker; Hagen, Knut; Dyb, Grete; Holmen, Turid Lingaas; Stovner, Lars Jacob. (2011) Association between blood pressure measures and recurrent headache in adolescents: cross-sectional data from the HUNT-Youth study. The Journal of Headache and Pain
  Academic article
• Bjørk, Marte-Helene; Hagen, Knut; Stovner, Lars Jacob; Sand, Trond. (2011) Photic EEG-driving responses related to ictal phases and trigger sensitivity in migraine: A longitudinal, controlled study. Cephalalgia
  Academic article
• Linde, Mattias; Hagen, Knut; Salvesen, Øyvind; Gravdahl, Gøril Bruvik; Helde, Grethe; Stovner, Lars Jacob. (2011) Onabotulinum toxin A treatment of cervicogenic headache: A randomised, double-blind, placebo-controlled crossover study. Cephalalgia
  Academic article
• Engstrøm, Morten; Ødegård, Siv Steinsmo; Sand, Trond; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut. (2011) The Reliability of a New Sleep Screening Questionnaire for Large Population-Based Studies: The Third Nord-Trøndelag Health Study. The Open Sleep Journal
  Academic article
• Laurell, Katarina; Artto, Ville; Bendtsen, Lars; Hagen, Knut; Kallela, Mikko; Meyer, Eva Laudon; Puutala, Jokka; Tronvik, Erling; Zwart, John-Anker; Linde, Mattias. (2011) Migrainous infarction: a Nordic multicenter study. European Journal of Neurology
  Academic article
• Ægidius, Karen Lehrmann; Zwart, John-Anker; Hagen, Knut; Dyb, Grete; Holmen, Turid Lingaas; Stovner, Lars Jacob. (2011) Increased headache prevalence in female adolescents and adult women with early menarche. The Head-HUNT Studies. European Journal of Neurology
  Academic article
• Hagen, Knut. (2011) Hodepine etter overforbruk av medikamenter. BestPractice
  Professional article
• Winsvold, Bendik Kristoffer Slagsvold; Hagen, Knut; Aamodt, Anne Hege; Stovner, Lars Jacob; Holmen, Jostein; Zwart, John-Anker. (2011) Headache, migraine and cardiovascular risk factors: The HUNT study. European Journal of Neurology
  Academic article
• Ødegård, Siv Steinsmo; Sand, Trond; Engstrøm, Morten; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut. (2011) The Long-Term Effect of Insomnia on Primary Headaches: A Prospective Population-Based Cohort Study (HUNT-2 and HUNT-3). Headache
  Academic article
• Linde, Mattias; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut. (2011) Time trends in the prevalence of headache disorders. The Nord-Trondelag Health Studies (HUNT 2 and HUNT 3). Cephalalgia
  Academic article
• Hagen, Knut; Albretsen, Claus; Vilming, Steinar; Salvesen, Rolf; Grønning, Marit; Helde, Grethe; Gravdahl, Gøril Bruvik; Zwart, John-Anker; Stovner, Lars Jacob. (2011) A 4-year follow-up of patients with medication-overuse headache previously included in a randomized multicentre study. The Journal of Headache and Pain
  Academic article
• Linde, Mattias; Hagen, Knut; Stovner, Lars Jacob. (2011) Botulinum toxin treatment of secondary headaches and cranial neuralgias: a review of evidence. Acta Neurologica Scandinavica, Supplementum
  Academic article
• Jacobsen, Brit Andenes; Dyb, Grete; Hagen, Knut; Stovner, Lars Jacob; Holmen, Turid Lingaas; Zwart, John-Anker. (2011) The Nord-Trøndelag Health Study shows increased prevalence of primary recurrent headaches among adolescents over a four-year period. Scandinavian Journal of Pain
  Academic article
• Myran, Rigmor; Hagen, Knut; Svebak, Sven; Nygaard, Øystein Petter; Zwart, John-Anker. (2011) Headache and musculoskeletal complaints among subjects with self reported whiplash injury. The HUNT-2 study. BMC Musculoskeletal Disorders
  Academic article
• Winsvold, Bendik Kristoffer Slagsvold; Hagen, Knut; Linde, Mattias; Midthjell, Kristian; Zwart, John-Anker. (2011) MIGRAINE WITH AURA AND THE METABOLIC SYNDROME: A PROSPECTIVE HUNT COHORT STUDY. European Journal of Neurology
  Conference abstract
• Bjørk, Marte-Helene; Stovner, Lars Jacob; Hagen, Knut; Sand, Trond. (2011) What initiates a migraine attack? Conclusions from four longitudinal studies of quantitative EEG and steady-state visual-evoked potentials in migraineurs. Acta Neurologica Scandinavica
  Academic article

2010

• Anttila, V; Stefansson, H; Kallela, M; Todt, U; Terwindt, GM; Calafato, MS; Nyholt, DR; Dimas, AS; Freilinger, T; Muller-Myhsok, Bertram. (2010) Genome-wide association study of migraine implicates a common susceptibility variant on 8q22.1. Nature Genetics
  Academic article
• Sand, Trond; Nilsen, Kristian Bernhard; Hagen, Knut; Stovner, Lars Jacob. (2010) Repeatability of cold pain and heat pain thresholds: The application of sensory testing in migraine research. Cephalalgia
  Academic article
• Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker. (2010) Associations between serum lipid levels and chronic low back pain. Epidemiology
  Academic article
• Hagen, Knut. (2010) Tester Botox mot hodepine Migrene. Dagbladet
  Commentary
• Robberstad, Line; Dyb, Grete; Hagen, Knut; Stovner, Lars Jacob; Holmen, Turid Lingaas; Zwart, John-Anker. (2010) An unfavorable lifestyle and recurrent headaches among adolescents: The HUNT study. Neurology
  Academic article
• Bjørk, Marte Helene; Hagen, Knut; Stovner, Lars Jacob; Sand, Trond. (2010) Photic EEG-driving responses (SSVEPs) are depressed in migraine without aura within a true interictal interval. European Journal of Neurology
  Conference abstract
• Kennair, Leif Edward Ottesen; Hagen, K.; Kaasa, H.; Isaksen, L.; Pedersen, L.; Svangtun, S.; Pallesen, S.. (2010) Masculinized bodies (D2:D4 ratio) predict masculine jealousy responses. The Human Behavior and Evolution Society 22nd Annual Meeting
  Conference abstract
• Hagen, Knut; Zwart, John-Anker; Aamodt, Anne Hege; Nilsen, Kristian Bernhard; Bråthen, Geir; Helde, Grethe; Stjern, Marit; Tronvik, Erling; Stovner, Lars Jacob. (2010) The validity of questionnaire-based diagnoses: the third Nord-Trøndelag Health study 2006-2008. The Journal of Headache and Pain
  Academic article
• Ægidius, Karen Lehrmann; Zwart, John-Anker; Hagen, Knut; Stovner, Lars Jacob. (2010) The Prevalence of Headache and Migraine in Relation to Sex Hormone Status In Women. NTNU-trykk
  Doctoral thesis
• Hagen, Knut; Jensen, Rigmor; Bøe, Magne Geir; Stovner, Lars Jacob. (2010) Medication overuse headache: a critical review of end points in recent follow-up studies. The Journal of Headache and Pain
  Academic literature review
• Nilsen, Kristian Bernhard; Flaten, Magne Arve; Hagen, Knut; Matre, Dagfinn; Sand, Trond. (2010) Sentralnervesystemets mekanismer for smertehemming. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic literature review
• Heuch, Ingrid; Hagen, Knut; Heuch, Ivar; Nygaard, Øystein Petter; Zwart, John-Anker. (2010) The impact of body mass index on the prevalence of low back pain. The HUNT study. Spine
  Academic article
• Ødegård, Siv Steinsmo; Engstrøm, Morten; Sand, Trond; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut. (2010) Associations between sleep disturbance and primary headaches: the third Nord-Trondelag Health Study. The Journal of Headache and Pain
  Academic article

2009

• Hagen, Knut; Thoresen, Kari; Stovner, Lars Jacob; Zwart, John-Anker. (2009) High dietary caffeine consumption is associated with a modest increase in headache prevalence: results from the Head-HUNT Study. The Journal of Headache and Pain
  Academic article
• Stovner, Lars Jacob; Tronvik, Erling; Zwart, John-Anker; Hagen, Knut. (2009) High pulse pressure is associated with a decreased prevalence of headache in adolescents. Cross-sectional data from an epidemiological study. Cephalalgia
  Conference abstract
• Ægidius, Karen Lehrmann; Zwart, John-Anker; Hagen, Knut; Stovner, Lars Jacob. (2009) Increased headache prevalence in female adolescents and adult women with early menarche. The Head-HUNT and Head-HUNT youth study. European Journal of Neurology
  Conference abstract
• Ægidius, Karen Lehrmann; Zwart, John-Anker; Hagen, Knut; Stovner, Lars Jacob. (2009) The Effect of Pregnancy and Parity on Headache Prevalence: The Head-HUNT Study. Headache
  Academic article
• Stovner, Lars Jacob; Hagen, Knut. (2009) Hypertension-associated hypalgesia: a clue to the comorbidity of headache and other pain disorders. Acta Neurologica Scandinavica, Supplementum
  Academic article
• Meyer, Eva; Laurell, Katarina; Artto, Ville; Bendtsen, Lars; Linde, Mattias; Kallela, Mikko; Tronvik, Erling; Zwart, John-Anker; Jensen, Rikke m; Hagen, Knut. (2009) Lateralization in cluster headache: a Nordic multicenter study. The Journal of Headache and Pain
  Academic article
• Aegidius, Karen; Zwart, John-Anker; Hagen, Knut; Stovner, Lars Jacob. (2009) The effect of pregnancy and parity on headache prevalence: the Head-HUNT study. Headache
  Academic article
• Stovner, Lars Jacob; Tronvik, Erling; Hagen, Knut. (2009) New drugs for migraine. The Journal of Headache and Pain
  Academic literature review
• Bjørk, Marte Helene; Stovner, Lars Jacob; Nilsen, Kristian Bernhard; Stjern, Marit; Hagen, Knut; Sand, Trond. (2009) The occipital alpha rhythm related to the "migraine cycle" and headache burden: a blinded, controlled longitudinal study. Clinical Neurophysiology
  Academic article
• Hagen, Knut; Albretsen, Claus; Vilming, Steinar T.; Salvesen, Rolf; Grønning, Marit; Helde, Grethe; Gravdahl, Gøril B.; Zwart, John-Anker; Stovner, Lars Jacob. (2009) Forebyggende medicin bør startes samtidig med afgiftning. MigræneNytt
  Popular science article
• Varkey, E; Hagen, Knut; Zwart, John-Anker; Linde, Mattias. (2009) Migrænikere er ikke specielt fysisk aktive. MigræneNytt
  Popular science article
• Hagen, Knut; Thoresen, Kari; Stovner, Lars Jacob; Zwart, John-Anker. (2009) Koffeinhovedpine er som pest eller kolera. Berlingske tidende
  Popular science article
• Sand, Trond; White, Linda; Hagen, Knut; Stovner, Lars Jacob. (2009) Visual evoked potential and spatial frequency in migraine: a longitudinal study. Acta Neurologica Scandinavica, Supplementum
  Academic article
• Hagen, Knut; Albretsen, Claus; Vilming, Steinar; Vilming, ST; Salvesen, Rolf; Gronning, M; Grønning, Marit; Helde, G; Gravdahl, G; Zwart, JA. (2009) Management of medication overuse headache: 1-year randomized multicentre open-label trial. Cephalalgia
  Academic article
• Bjørk, Marte Helene; Stovner, Lars Jacob; Engstrøm, Morten; Stjern, Marit; Hagen, Knut; Sand, Trond. (2009) Interictal quantitative EEG in migraine: a blinded controlled study. The Journal of Headache and Pain
  Academic article
• Hagen, Knut. (2009) Infeksjonsrisiko hos orienteringsløpere. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic literature review

2008

• Hagen, Knut. (2008) Comprehensive review of headache Medicine. New England Journal of Medicine
  Book review
• Tronvik, Erling; Stovner, Lars Jacob; Hagen, Knut; Holmen, Jostein; Zwart, John-Anker. (2008) Højt boldtryk beskyttter mod migræne. MigræneNytt
  Popular science article
• Holthe, H; Werpen, Hanne; Zwart, John-Anker; Hagen, Knut. (2008) Physical activity as a predictor for chronic musculoskeletal complaints: Results from the Nord-Trøndelag Heath Study. BMC Musculoskeletal Disorders
  Academic article
• Holth, Helene Sulutvedt; Werpen, Hanne Kine Buchardt; Zwart, John-Anker; Hagen, Knut. (2008) Physical inactivity is associated with chronic musculoskeletal complaints 11 years later: results from the Nord-Trøndelag Health Study. BMC Musculoskeletal Disorders
  Academic article
• Varkey, Emma; Hagen, Knut; Zwart, John-Anker; Linde, Matias. (2008) Physical activity and headache: results from the Nord-Trøndelag Health Study (HUNT). Cephalalgia
  Academic article
• Bækken, Petter; Skorpen, Frank; Stordal, Eystein; Zwart, John-Anker; Hagen, Knut. (2008) Depression and anxiety in relation to catechol-O-methyltransferase Val158Met genotype in the general population: The Nord-Trøndelag Health Study (HUNT). BMC Psychiatry
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Skorpen, Frank; Pettersen, Elin; Zwart, John-Anker. (2008) COMT genotypes and use of antipsychotic medication: linking population-based prescription database to the HUNT study. Pharmacoepidemiology and Drug Safety
  Academic article
• Bœkken, Petter; Skorpen, Frank; Stordal, Eystein; Zwart, John-Anker; Hagen, Knut. (2008) Depression and anxiety in relation to catechol-O-methyltransferase Val158Met genotype in the general population: The Nord-Trøndelag Health Study (HUNT). BMC Psychiatry
  Academic article
• Hagen, Knut; Zwart, John-Anker; Aamodt, Anne Hege; Nilsen, Kristian Bernhard; Bråthen, Geir; Helde, Grethe; Stjern, Marit; Tronvik, Erling; Stovner, Lars Jacob. (2008) A face-to-face interview of participants in HUNT 3: the impact of the screening question on headache prevalence. The Journal of Headache and Pain
  Academic article
• Vankey, Emma; Hagen, Knut; Zwart, John-Anker; Linde, Mattias. (2008) Physical activity and headache: results from the Nord-Trøndelag Health Study (HUNT). Cephalalgia
  Academic article
• Hagen, Knut. (2008) Harru Potter´s Headache. Headache
  Commentary
• Sand, Trond; Zhitniy, Nikita; Nilsen, Kristian Bernhard; Helde, Grethe; Hagen, Knut; Stovner, Lars Jacob. (2008) Thermal pain thresholds are decreased in the migraine preattack phase. European Journal of Neurology
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Skorpen, Frank; Pettersen, Elin; Zwart, John-Anker. (2008) COMT genotypes and use of antipsychotic medication: linking population-based prescription database to the HUNT study. Pharmacoepidemiology and Drug Safety
  Academic article
• Hoff, Ole Martin; Midthjell, Kristian; Zwart, John-Anker; Hagen, Knut. (2008) The association between diabetes mellitus, glucose, and chronic musculoskeletal complaints. Results from the Nord-Trondelag Health Study. BMC Musculoskeletal Disorders
  Academic article
• Hoff, Ole; Midthjell, Kristian; Zwart, John-Anker; Hagen, Knut. (2008) The association between diabetes mellitus, glucose, and chronic musculoskeletal complaints. Results from the Nord-Trøndelag Health Study. BMC Musculoskeletal Disorders
  Academic article
• Aamodt, Anne Hege; Stovner, Lars Jacob; Hagen, Knut; Zwart, John-Anker. (2008) Comorbidity of headache and gastrointestinal complaints. The Head-HUNT Study. Cephalalgia
  Academic article
• Tronvik, Erling; Stovner, Lars Jacob; Hagen, Knut; Holmen, Jostein; Zwart, John-Anker. (2008) High pulse pressure protects against headache. Prospective and cross-sectional data (HUNT study). Neurology
  Academic article

2007

• Aamodt, Anne Hege; Stovner, Lars Jacob; Midthjell, Kristian; Hagen, Knut; Zwart, John-Anker. (2007) Headache prevalence related to diabetes mellitus. The HUNT study. European Journal of Neurology
  Academic article
• Aegidius, Karen; Stovner, Lars Jacob; Hagen, Knut; Zwart, John-Anker; Schei, Berit. (2007) Hormonbehandling efter overgangsalderen og migræne. MigræneNytt
  Popular science article
• Hagen, Knut; Pettersen, Elin; Stovner, Lars Jacob; Skorpen, Frank; Holmen, Jostein; Zwart, John-Anker. (2007) High Systolic Blood Pressure Is Associated With Val/Val Genotype in the Catechol-O-Methyltransferase Gene The Nord-Trondelag Health Study (HUNT). American Journal of Hypertension
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Zwart, John-Anker. (2007) Potentials and pitfalls in analytical headache epidemiological studies - lessions to be learned from the Head-HUNT study. Cephalalgia
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Skorpen, Frank; Pettersen, Elin; Zwart, John-Anker. (2007) The impact of the Catechol-O-methyltransferase Val158Met polymorhism on survival in the general population -The HUNT study. BMC Medical Genetics
  Academic article
• Aamodt, Anne Hege; Stovner, Lars Jacob; Langhammer, Arnulf; Hagen, Knut; Zwart, John-Anker. (2007) Is headache related to asthma, hay fever, and chronic brochitis? The Head-HUNT study. Headache
  Academic article
• Aamodt, Anne Hege; Stovner, Lars Jacob; Midthjell, Kristian; Hagen, Knut; Zwart, John-Anker. (2007) Headache prevalence related to diabetes mellitus. The HUNT study. Cephalalgia
  Conference abstract
• Hagen, Knut; Albretsen, Claus; Stovner, Lars Jacob; Vilming, Steinar; Salvesen, Rolf; Grønning, Marit; Helde, Grethe; Gravdahl, Gøril B.; Zwart, John-Anker. (2007) Management of probable medication-overuse headache: 1-year randomized prospective multicenter trial. Cephalalgia
  Conference abstract
• Stovner, Lars Jacob; Hagen, Knut; Jensen, Rigmor; Katsarava, Zaza; Lipton, Richard; Scher, Ann; Steiner, Tim; Zwart, John-Anker. (2007) The global burden of headache: a documentation of headache prevalence and disability wordwide. Cephalalgia
  Academic literature review
• Ægeidus, Karen; Zwart, John-Anker; Hagen, Knut; Schei, Berit; Stovner, Lars Jacob. (2007) Hormone replacement therapy and headache prevalence in postmenopausal women. The Head-HUNT study. European Journal of Neurology
  Academic article

2006

• Ødegaard, Ketil Joachim; Neckelmann, Dag; Mykletun, Arnstein; Dahl, Alv Andreas; Zwart, John-Anker; Hagen, Knut; Fasmer, Ole Bernt. (2006) Migraine with and without aura: association with depression and anxiety disorder in a population-based study. The HUNT Study. Cephalalgia
  Academic article
• Hagen, Knut; Pettersen, Elin; Stovner, Lars Jacob; Skorpen, Frank; Zwart, John-Anker. (2006) No association between chronic musculoskeletal complaints and Val158Met polymorphism in the Catechol-O-methyltransferase gene. Hhe HUNT Study. BMC Musculoskeletal Disorders
  Academic article
• Fiane, Ingeborg; Haugland, ME; Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut; Bovim, Gunnar. (2006) Sick leave is related to frequencies of migraine and non-migrainous headache - The HUNT study. Cephalalgia
  Academic article
• Hagen, Knut; Stovner, Lars Jacob. (2006) Migrenebehandling ved graviditet og amming. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic literature review
• Stovner, Lars Jacob; Hagen, Knut. (2006) Prevalence, burden, and cost of headache disorders. Current Opinion in Neurology
  Academic article
• Svebak, Sven; Hagen, Knut; Zwart, John-Anker. (2006) One-year prevalence of chronic musculoskeletal pain in a large adult Norwegian county population: Relations with age and gender - The HUNT Study. Journal of Musculoskeletal Pain
  Academic article
• Hagen, Knut. (2006) Flervalgsspørsmål er ny eksamensform på medisinstudiet, NTNU. Hvordan få 200 nye spørsmål hvert år?. Seksjon for universitetspedagogikk, Program for lærerutdanning, SVT. NTNU
  Research report
• Ægidius, Karen Lehrmann; Zwart, John-Anker; Hagen, Knut; Schei, Berit; Stovner, Lars Jacob. (2006) Oral contraceptives and increased headache prevalence - The Head-HUNT Study. Neurology
  Academic article
• Hagen, Knut; Svebak, Sven; Zwart, John-Anker. (2006) Incidence of musculoskeletal complaints in a large adult Norwegian county population. The HUNT Study. Spine
  Academic article
• Aamodt, Anne Hege; Stovner, Lars Jacob; Hagen, Knut; Bråthen, Geir; Zwart, John-Anker. (2006) Headache prevalence related to smoking and alcohol use. The Head-HUNT Study. European Journal of Neurology
  Academic article
• Tronvik, Erling; Stovner, Lars Jacob; Hagen, Knut; Holmen, Jostein; Zwart, John-Anker. (2006) Hypertension-associated hypalgesia. An important mechanism in headache and other pains ?.
  Academic chapter
• Stovner, Lars Jacob; Zwart, John-Anker; Hagen, Knut; Terwindt, GM; Pascual, J. (2006) Epidemiology of headache in Europe. European Journal of Neurology
  Academic literature review
• Bjørk, Marte Helene; Nilsen, BM; Stovner, Lars Jacob; Hagen, Knut; Sand, Trond. (2006) The alpha rhythm in migraine: a longitudinal EEG study. Scotland Clin Neurophysiol
  Conference abstract
• Hagen, Knut; Haukland, Marte; Fiane, Ingeborg; Stovner, Lars Jacob; Zwart, John-Anker; Bovim, Gunnar. (2006) Sickness absence is related to headache frequency. The HUNT Study. The Journal of Headache and Pain
  Conference abstract
• Hagen, Knut; Pettersen, Elin; Stovner, Lars Jacob; Skorpen, Frank; Zwart, John-Anker. (2006) The association between headache and Val/Met polymorphism in the Catechol-O-methyltransferase gene. The HUNT Study. The Journal of Headache and Pain
  Conference abstract
• Zwart, John-Anker; Hagen, Knut; Stovner, Lars Jacob. (2006) Impact of weight increase on headache prevalence. The HUNT Study. The Journal of Headache and Pain
  Conference abstract
• Aamodt, Anne Hege; Stovner, Lars Jacob; Langhammer, Arnulf; Hagen, Knut; Zwart, John-Anker. (2006) Is headache related to asthma, hay fever, and chronic bronchitis? The Head-HUNT Study. Headache
  Academic article

2005

• Hagen, Knut. (2005) Refleksinformasjon. Adresseavisen
  Commentary
• Hagen, Knut. (2005) Mindre muskel og skjelettplager ved høyt blodtrykk. Dagens medisin
  Commentary
• Hagen, Knut. (2005) Stoffskifte og muskel- og skjelettplager. Trønder-avisa
  Commentary
• Hagen, Knut. (2005) Sosio-økonomisk status og stoffskifte. Trønder-avisa
  Commentary
• Hagen, Knut; Zwart, John-Anker; Svebak, Sven; Bovim, Gunnar; Stovner, Lars Jacob. (2005) Low socioeconomic status is associated with chronic musculoskeletal complaints among 46,901 adults in Norway. Scandinavian Journal of Public Health
  Academic article
• Hagen, Knut; Zwart, John-Anker; Holmen, Jostein; Svebak, Sven; Bovim, Gunnar; Stovner, Lars Jacob. (2005) Does hypertension protect against chronic musculoskeletal complaints? The Nord-Trøndelag Healt Study. Archives of Internal Medicine
  Academic article
• Ægidius, K.; Zwart, John-Anker; Hagen, Knut; Schei, Berit; Stovner, Lars Jacob. (2005) Headache and hormone replacement therapy in postmenopausal women. Prevalence in a large Norwegian population-based survey, 1995 -97. European Journal of Neurology
  Conference abstract
• Ægidius, K.; Zwart, John-Anker; Hagen, Knut; Schei, Berit; Stovner, Lars Jacob. (2005) Oral contraceptives and increased headache prevalence. The Head-HUNT stuyd. European Journal of Neurology
  Conference abstract
• Stovner, Lars Jacob; Aamodt, Anne Hege Nymoen; Hagen, Knut; Zwart, John-Anker. (2005) Comorbidity og headache and gastrointestinal complaints. The HUNT study. Cephalalgia
  Conference abstract
• Aamodt, Anne Hege Nymoen; Stovner, Lars Jacob; Hagen, Knut; Bråthen, Geir; Zwart, John-Anker. (2005) Tobacco and alcohol use in relation to headache. The Head-HUNT study. Cephalalgia
  Conference abstract
• Bjørk, Marte Helene; Zhitny, Nikita Borisovich; Stjern, Marit; Helde, Grethe; Gravdahl, Gøril B.; Stovner, Lars Jacob; Hagen, Knut; Zwart, John-Anker; Sand, Trond. (2005) Quantitative electroencephalography (QEEG) in migraine. Cephalalgia
  Conference abstract
• Hagen, Knut; Bjoro, T.; Zwart, John-Anker; Svebak, Sven; Bovim, Gunnar; Stovner, Lars Jacob. (2005) Do high TSH values protect against chronic musculoskeletal complaints? The Nord-Trondelag Health Study (HUNT). Pain
  Academic article

2004

• Aamodt, AH; Borch-Iohnsen, Berit; Hagen, K; Stovner, LJ; Asberg, A; Zwart, JA. (2004) Headache prevalence related to haemoglobin and ferritin. The HUNT Study. Cephalalgia
  Academic article
• Aamodt, Anne Hege Nymoen; Borch-Ionsen, B; Hagen, Knut; Stovner, Lars Jacob; Åsberg, A; Zwart, John-Anker. (2004) Headache prevalence related to haemoglobin and ferritin. Cephalalgia
  Academic article
• Zwart, John-Anker; Dyb, Grete; Hagen, Knut; Svebak, Sven; Stovner, Lars Jacob; Holmen, Jostein. (2004) Analgesic overuse among subjects with headache, neck, and low-back pain. Neurology
  Academic article
• Hagen, Knut. (2004) Reducing the burden of headache. Journal of Epidemiology and Community Health
  Book review
• Aamodt, Anne Hege Nymoen; Stovner, Lars Jacob; Hagen, Knut; Zwart, John-Anker. (2004) Comorbity of headache and gastrointestinal complaints. The HUNT study. Annual meeting for the Norwegian Neurological Association
  Conference abstract

2003

• Zwart, John-Anker; Dyb, G; Hagen, Knut; Ødegård, K J; Dahl, Alv A; Bovim, Gunnar; Stovner, Lars Jacob. (2003) Anxiety and depression associated with headache frequency. The Nord-Trøndelag Health Study. European Journal of Neurology
  Academic article
• Sand, Trond; Hagen, Knut; Schrader, Harald. (2003) Sleep apnoea and chronic headache. Cephalalgia
  Academic article
• Zwart, John-Anker; Hagen, K.; Ødegård, K.J.; Dahl, Alv A; Bovim, Gunnar; Stovner, LJ. (2003) Anxiety disorders and depression associated with headache frequency. The Nord-Trøndelag Health Study. European Journal of Neurology
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Åsberg, Arne; Thorstensen, Ketil; Bjerve, Kristian S; Hveem, Kristian. (2003) Reply. Annals of Neurology
  Academic article
• Zwart, John-Anker; Dyb, G; Hagen, Knut; Ødegård, K J; Dahl, Alv A; Bovim, Gunnar; Stovner, Lars Jacob. (2003) Anxiety and depression disorders associated with headache frequency. The Nord-Trøndelag Health Study. European Journal of Neurology
  Academic article
• Zwart, John-Anker; Dyb, G; Hagen, Knut; Svebak, Sven; Holmen, Jostein. (2003) Analgesic use, a predictor of chronic pain and medication overuse headache. The head-HUNT Study. Neurology
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Åsberg, Arne; Thorstensen, Ketil; Bjerve, Kristian S; Hveem, Kristian. (2003) Letter (Reply). Annals of Neurology
  Academic article
• Stovner, Lars Jacob; Bovim, Gunnar; Hagen, Knut; Vatten, Lars Johan; Zwart, John-Anker; Krogstad, S. (2003) Low socioeconomic status is associated with increased risk of frequent headache. A prospective study of 22 718 adults i. Oxford University Press
  Non-fiction monograph
• Stovner, Lars Jacob; Hagen, Knut; Vatten, Lars Johan; Zwart, John-Anker; Krogstad, S; Bovim, Gunnar. (2003) Low socio-economic status is associated with increased risk of frequent headache: A prospective study of 22 718 adults in Norway. Oxford University Press
  Academic article
• Hagen, Knut. (2003) Jakten på årsaker til hodepine. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article
• Hagen, Knut. (2003) Genetiske aspekter ved hodepine. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article

2002

• Stovner, Lars Jacob; Hagen, Knut; Waage, Anders; Bjerve, Kristian S. (2002) Hereditary haemochromatosis in two cousins with cluster headache. Cephalalgia
  Academic article
• Hagen, Knut; Einarsen, C; Zwart, John-Anker; Svebak, Sven; Bovim, Gunnar. (2002) Musculoskeletal dicomfort and headache. Head-HUNT - a large population-based study. European Journal of Neurology
  Academic article
• Hagen, Knut; Vatten, Lars Johan; Stovner, Lars Jacob; Zwart, John-Anker; Krokstad, Steinar; Bovim, Gunnar. (2002) Low Socio-economic status is associated with increased risk of frequent headace. Cephalalgia
  Academic article
• Hagen, Knut; Vatten, Lars Johan; Stovner, Lars Jacob; Zwart, John-Anker; Krogstad, S; Bovim, Gunnar. (2002) Low socioeconomic status is associated with increased risk of frequent headache. A prospective study of 22 718 adults in Norway. Cephalalgia
  Academic article
• Hagen, Knut. (2002) Head-HUNT.The epidemiology of headache in Nord-Trøndelag. Thesis
  Academic article
• Hagen, Knut; Einarsen, C; Zwart, John-Anker; Svebak, Sven; Bovim, Gunnar. (2002) The co-occurrence of headache and musculoskeletal symptoms among 51 050 adults in Norway. European Journal of Neurology
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Vatten, Lars Johan; Holmen, Jostein; Zwart, John-Anker; Bovim, Gunnar. (2002) Blood pressure and risk of headache: a prospective study of 22 685 adults in Norway. Journal of Neurology, Neurosurgery and Psychiatry
  Academic article
• Hagen, Knut. (2002) Head-HUNT: Jakten på årsaker til hodepine. Skrustikka - medlemsblad for Norges migreneforbund
  Popular science article
• Stovner, Lars Jacob; Hagen, Knut; Waage, Anders; Bjerve, Kristian S. (2002) Hereditary hemochromatosis in two cousins with cluster headache. Cephalalgia
  Academic article
• Hagen, Knut; Stovner, Lars Jacob; Åsberg, Arne; Thorstensen, Ketil; Bjerve, Kristian S; Hveem, Kristian. (2002) High headache prevalence among women with hemochromatosis. The Nord-Trøndelag Health Study. Annals of Neurology
  Academic article

2001

• Hagen, Knut; Bjøro, Trine; Zwart, John-Anker; Vatten, Lars Johan; Stovner, Lars Jacob; Bovim, Gunnar. (2001) Low headache prevalence amongst women with high TSH values. Head-HUNT - a large population-based study. European Journal of Neurology
  Academic article

2000

• Hagen, Knut; Zwart, John-Anker; Vatten, Lars Johan; Stovner, Lars Jacob; Bovim, Gunnar. (2000) Head-HUNT : validity and reliability of a headache questionnaire in a large population-based study in Norway. Cephalalgia
  Academic article

1999

• Bay, Ann-Helén; Hagen, K.; Riis, Christian; Sørensen, Roar. (1999) Konkurranseutsetting av velferdsstaten? Konsekvenser av anbudskonkurranser og fritt forbrukervalg. Handelshøyskolen BI
  Research report
• Hagen, Knut; Zwart, John-Anker; Vatten, Lars Johan; Stovner, Lars Jacob; Bovim, Gunnar. (1999) Forbruk av ergotamin og sumatriptan i Nord-Trøndelag. Norsk nevrologisk Forening
  Research report

1998

• Hagen, Knut; Boman, Helge; Mellgren, Svein Ivar; Lindal, Sigurd; Bovim, Gunnar. (1998) Progressive Central and Peripheral Demyelinating Disease of Adult Onset in a Norwegian Family. Archives of Neurology
  Academic article
• Hagen, Knut; Boman, Helge; Mellgren, Svein Ivar; Lindal, Sigurd; Bovim, Gunnar. (1998) Progressive central and peripheral demyelinating disease of adult onset in a Norwegian family. Archives of Neurology
  Academic article
• Hagen, Knut; Mellgren, Svein Ivar; Bovim, Gunnar. (1998) Myelinsykdommer med affeksjon av både det sentrale og det perifere nervesystem. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article
• Hagen, Knut; Bovim, Gunnar. (1998) Autosomal dominant arvelig hjerneinfarktsykdom. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article
• Hagen, Knut; Mellgren, Svein Ivar; Bovim, Gunnar. (1998) Myelinsykdommer med affeksjon av både det sentrale og det perifere nervesystem. Tidsskrift for Den norske legeforening (Tidsskriftet)
  Academic article

1995

• Underdal, A.; Austgulen, Rigmor; Blegen, K.; Fossan, O.A.; Feilberg, Julie; Hag, K.; Hagen, K.; Kleppe, Jon; Kvaløy, K.; Ramberg, I.. (1995) Norges teknisk-naturvitenskapelige universitet (NTNU) : forslag til framtidig faglig organisasjon : innstilling fra et utvalg oppnevnt ved kongelig resolusjon av 27. april 1995. Universitetsforlaget
  Working paper