Publications 2019

Brumpton BM, Fritsche LG, Zheng J, Nielsen JB, Mannila M, Surakka I, Rasheed H, Vie GÅ, Graham SE, Gabrielsen ME, Laugsand LE, Aukrust P, Vatten LJ, Damås JK, Ueland T, Janszky I, Zwart JA, Van't Hooft FM, Seidah NG, Hveem K, Willer C, Smith GD, Åsvold BO, INVENT Consortium (2019)
Variation in Serum PCSK9 (Proprotein Convertase Subtilisin/Kexin Type 9), Cardiovascular Disease Risk, and an Investigation of Potential Unanticipated Effects of PCSK9 Inhibition
Circ Genom Precis Med, 12 (1), e002335
DOI 10.1161/CIRCGEN.118.002335, PubMed 30645169

Børte S, Zwart JA, Stensland SØ, Hagen K, Winsvold BS (2019)
Parental migraine in relation to migraine in offspring: Family linkage analyses from the HUNT Study
Cephalalgia, 39 (7), 854-862
DOI 10.1177/0333102419828989, PubMed 30714392

Fjeld OR, Grotle M, Matre D, Pedersen LM, Lie MU, Småstuen MC, Storheim K, Heuch I, Stubhaug A, Zwart JA, Nilsen KB (2019)
Predicting the outcome of persistent sciatica using conditioned pain modulation: 1-year results from a prospective cohort study
Scand J Pain (in press)
DOI 10.1515/sjpain-2019-0112, PubMed 31527299

Fjeld OR, Grøvle L, Helgeland J, Småstuen MC, Solberg TK, Zwart JA, Grotle M (2019)
Complications, reoperations, readmissions, and length of hospital stay in 34 639 surgical cases of lumbar disc herniation
Bone Joint J, 101-B (4), 470-477
DOI 10.1302/0301-620X.101B4.BJJ-2018-1184.R1, PubMed 30929479

Grotle M, Småstuen MC, Fjeld O, Grøvle L, Helgeland J, Storheim K, Solberg TK, Zwart JA (2019)
Lumbar spine surgery across 15 years: trends, complications and reoperations in a longitudinal observational study from Norway
BMJ Open, 9 (8), e028743
DOI 10.1136/bmjopen-2018-028743, PubMed 31375617

Grøvle L, Fjeld OR, Haugen AJ, Helgeland J, Småstuen MC, Solberg TK, Zwart JA, Grotle M (2019)
The Rates of LSS Surgery in Norwegian Public Hospitals: A Threefold Increase From 1999 to 2013
Spine (Phila Pa 1976), 44 (6), E372-E378
DOI 10.1097/BRS.0000000000002858, PubMed 30234811

Guddal MH, Stensland SØ, Småstuen MC, Johnsen MB, Zwart JA, Storheim K (2019)
Physical activity and sport participation among adolescents: associations with mental health in different age groups. Results from the Young-HUNT study: a cross-sectional survey
BMJ Open, 9 (9), e028555
DOI 10.1136/bmjopen-2018-028555, PubMed 31488476

Heuch I, Heuch I, Hagen K, Sørgjerd EP, Åsvold BO, Zwart JA (2019)
Does diabetes influence the probability of experiencing chronic low back pain? A population-based cohort study: the Nord-Trøndelag Health Study
BMJ Open, 9 (9), e031692
DOI 10.1136/bmjopen-2019-031692, PubMed 31515434

Ho KKN, Simic M, Cvancarova Småstuen M, de Barros Pinheiro M, Ferreira PH, Bakke Johnsen M, Heuch I, Grotle M, Zwart JA, Nilsen KB (2019)
The association between insomnia, c-reactive protein, and chronic low back pain: cross-sectional analysis of the HUNT study, Norway
Scand J Pain (in press)
DOI 10.1515/sjpain-2019-0033, PubMed 31287802

Lane JM, Jones SE, Dashti HS, Wood AR, Aragam KG, van Hees VT, Strand LB, Winsvold BS, Wang H, Bowden J, Song Y, Patel K, Anderson SG, Beaumont RN, Bechtold DA, Cade BE, Haas M, Kathiresan S, Little MA, Luik AI, Loudon AS, Purcell S, Richmond RC, Scheer FAJL, Schormair B et al. (2019)
Biological and clinical insights from genetics of insomnia symptoms
Nat Genet, 51 (3), 387-393
DOI 10.1038/s41588-019-0361-7, PubMed 30804566

Lie MU, Petriu E, Matre D, Hansson P, Andersen OK, Zwart JA, Nilsen KB (2019)
Psychophysical or spinal reflex measures when assessing conditioned pain modulation?
Eur J Pain
DOI 10.1002/ejp.1462, PubMed 31359580

Skarpsno ES, Mork PJ, Nilsen TIL, Steingrímsdóttir ÓA, Zwart JA, Nilsen KB (2019)
The interplay between sleeplessness and high-sensitivity C-reactive protein on risk of chronic musculoskeletal pain. Longitudinal data from the Tromsø Study
Sleep (in press)
DOI 10.1093/sleep/zsz127, PubMed 31135903

Wang H, Lane JM, Jones SE, Dashti HS, Ollila HM, Wood AR, van Hees VT, Brumpton B, Winsvold BS, Kantojärvi K, Palviainen T, Cade BE, Sofer T, Song Y, Patel K, Anderson SG, Bechtold DA, Bowden J, Emsley R, Kyle SD, Little MA, Loudon AS, Scheer FAJL, Purcell SM, Richmond RC et al. (2019)
Genome-wide association analysis of self-reported daytime sleepiness identifies 42 loci that suggest biological subtypes
Nat Commun, 10 (1), 3503
DOI 10.1038/s41467-019-11456-7, PubMed 31409809

Publications 2018

Brainstorm Consortium, Anttila V, Bulik-Sullivan B, Finucane HK, Walters RK, Bras J, Duncan L, Escott-Price V, Falcone GJ, Gormley P, Malik R, Patsopoulos NA, Ripke S, Wei Z, Yu D, Lee PH, Turley P, Grenier-Boley B, Chouraki V, Kamatani Y, Berr C, Letenneur L, Hannequin D, Amouyel P, Boland A et al. (2018)
Analysis of shared heritability in common disorders of the brain
Science, 360 (6395)
DOI 10.1126/science.aap8757, PubMed 29930110

Hagen K, Kristoffersen ES, Winsvold BS, Stovner LJ, Zwart JA (2018)
Remission of chronic headache: An 11-year follow-up study. Data from the Nord-Trøndelag Health Surveys 1995-1997 and 2006-2008
Cephalalgia, 38 (14), 2026-2034
DOI 10.1177/0333102418769940, PubMed 29629599

Hagen K, Åsberg AN, Stovner L, Linde M, Zwart JA, Winsvold BS, Heuch I (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, 38 (13), 1919-1926
DOI 10.1177/0333102418764888, PubMed 29517305

Hellevik AI, Johnsen MB, Langhammer A, Baste V, Furnes O, Storheim K, Zwart JA, Flugsrud GB, Nordsletten L (2018)
Metabolic syndrome as a risk factor for total hip or knee replacement due to primary osteoarthritis: a prospective cohort study (the HUNT study and the Norwegian Arthroplasty Register)
Clin Epidemiol, 10, 83-96
DOI 10.2147/CLEP.S145823, PubMed 29391831

Heuch I, Heuch I, Hagen K, Sørgjerd EP, Åsvold BO, Zwart JA (2018)
Is chronic low back pain a risk factor for diabetes? The Nord-Trøndelag Health Study
BMJ Open Diabetes Res Care, 6 (1), e000569
DOI 10.1136/bmjdrc-2018-000569, PubMed 30397493

Jacobsena BA, Dyb G, Hagen K, Stovner LJ, Holmen TL, Zwart JA (2018)
The Nord-Trøndelag Health Study shows increased prevalence of primary recurrent headaches among adolescents over a four-year period
Scand J Pain, 2 (3), 148-152
DOI 10.1016/j.sjpain.2011.03.002, PubMed 29913741

Johnsen MB, Winsvold BS, Børte S, Vie GÅ, Pedersen LM, Storheim K, Skorpen F, Hagen K, Bjørngaard JH, Åsvold BO, Zwart JA (2018)
The causal role of smoking on the risk of headache. A Mendelian randomization analysis in the HUNT study
Eur J Neurol, 25 (9), 1148-e102
DOI 10.1111/ene.13675, PubMed 29747220

Kambur O, Kaunisto MA, Winsvold BS, Wilsgaard T, Stubhaug A, Zwart JA, Kalso E, Nielsen CS (2018)
Genetic variation in P2RX7 and pain tolerance
Pain, 159 (6), 1064-1073
DOI 10.1097/j.pain.0000000000001188, PubMed 29470314

Vandenberghe G, Bloemenkamp K, Berlage S, Colmorn L, Deneux-Tharaux C, Gissler M, Knight M, Langhoff-Roos J, Lindqvist PG, Oberaigner W, Van Roosmalen J, Zwart J, Roelens K, INOSS (the International Network of Obstetric Survey Systems) (2018)
The International Network of Obstetric Survey Systems study of uterine rupture: a descriptive multi-country population-based study
BJOG, 126 (3), 370-381
DOI 10.1111/1471-0528.15271, PubMed 29727918

Winsvold BS, Marvik A, Zwart JA, Aamodt AH (2018)
Migraine and stroke
Tidsskr Nor Laegeforen, 138 (4)
DOI 10.4045/tidsskr.17.0347, PubMed 29460580

Åsberg AN, Hagen K, Stovner LJ, Heuch I, Zwart JA, Winsvold BS (2018)
Do incident musculoskeletal complaints influence mortality? The Nord-Trøndelag Health study
PLoS One, 13 (9), e0203925
DOI 10.1371/journal.pone.0203925, PubMed 30265708

Publications 2017

Børte S, Winsvold BS, Stensland SØ, Småstuen MC, Zwart JA (2017)
The effect of foetal growth restriction on the development of migraine and tension-type headache in adulthood. The HUNT Study
PLoS One, 12 (4), e0175908
DOI 10.1371/journal.pone.0175908, PubMed 28410431

Fjeld O, Grotle M, Siewers V, Pedersen LM, Nilsen KB, Zwart JA (2017)
Prognostic Factors for Persistent Leg-Pain in Patients Hospitalized With Acute Sciatica
Spine (Phila Pa 1976), 42 (5), E272-E279
DOI 10.1097/BRS.0000000000001773, PubMed 28244968

Guddal MH, Stensland SØ, Småstuen MC, Johnsen MB, Zwart JA, Storheim K (2017)
Physical Activity Level and Sport Participation in Relation to Musculoskeletal Pain in a Population-Based Study of Adolescents: The Young-HUNT Study
Orthop J Sports Med, 5 (1), 2325967116685543
DOI 10.1177/2325967116685543, PubMed 28203603

Hagen K, Åsvold BO, Midthjell K, Stovner LJ, Zwart JA, Linde M (2017)
Inverse relationship between type 1 diabetes mellitus and migraine. Data from the Nord-Trøndelag Health Surveys 1995-1997 and 2006-2008
Cephalalgia, 38 (3), 417-426
DOI 10.1177/0333102417690488, PubMed 28114807

Hellevik AI, Johnsen MB, Langhammer A, Fenstad AM, Furnes O, Storheim K, Zwart JA, Flugsrud G, Nordsletten L (2017)
Incidence of total hip or knee replacement due to osteoarthritis in relation to thyroid function: a prospective cohort study (The Nord-Trøndelag Health Study)
BMC Musculoskelet Disord, 18 (1), 201
DOI 10.1186/s12891-017-1565-6, PubMed 28521834

Hellevik AI, Nordsletten L, Johnsen MB, Fenstad AM, Furnes O, Storheim K, Zwart JA, Flugsrud G, Langhammer A (2017)
Age of menarche is associated with knee joint replacement due to primary osteoarthritis (The HUNT Study and the Norwegian Arthroplasty Register)
Osteoarthritis Cartilage, 25 (10), 1654-1662
DOI 10.1016/j.joca.2017.06.010, PubMed 28705605

Hellevik AI, Nordsletten L, Johnsen MB, Fenstad AM, Furnes O, Storheim K, Zwart JA, Flugsrud G, Langhammer A (2017)
Corrigendum to "Age of menarche is associated with knee joint replacement due to primary osteoarthritis (The HUNT Study and the Norwegian Arthroplasty Register)" [Osteoarthr Cartil 25 (2017) 1654-1662]
Osteoarthritis Cartilage, 25 (12), 2148-2149
DOI 10.1016/j.joca.2017.10.006, PubMed 29066295

Heuch I, Heuch I, Hagen K, Mai XM, Langhammer A, Zwart JA (2017)
Is there an association between vitamin D status and risk of chronic low back pain? A nested case-control analysis in the Nord-Trøndelag Health Study
BMJ Open, 7 (11), e018521
DOI 10.1136/bmjopen-2017-018521, PubMed 29175890

Heuch I, Heuch I, Hagen K, Zwart JA (2017)
Physical activity level at work and risk of chronic low back pain: A follow-up in the Nord-Trøndelag Health Study
PLoS One, 12 (4), e0175086
DOI 10.1371/journal.pone.0175086, PubMed 28394896

Johnsen MB, Hellevik AI, Småstuen MC, Langhammer A, Furnes O, Flugsrud GB, Nordsletten L, Zwart JA, Storheim K (2017)
The mediating effect of body mass index on the relationship between smoking and hip or knee replacement due to primary osteoarthritis. A population-based cohort study (the HUNT Study)
PLoS One, 12 (12), e0190288
DOI 10.1371/journal.pone.0190288, PubMed 29284048

Johnsen MB, Vie GÅ, Winsvold BS, Bjørngaard JH, Åsvold BO, Gabrielsen ME, Pedersen LM, Hellevik AI, Langhammer A, Furnes O, Flugsrud GB, Skorpen F, Romundstad PR, Storheim K, Nordsletten L, Zwart JA (2017)
The causal role of smoking on the risk of hip or knee replacement due to primary osteoarthritis: a Mendelian randomisation analysis of the HUNT study
Osteoarthritis Cartilage, 25 (6), 817-823
DOI 10.1016/j.joca.2016.12.021, PubMed 28049019

Lie MU, Matre D, Hansson P, Stubhaug A, Zwart JA, Nilsen KB (2017)
A tonic heat test stimulus yields a larger and more reliable conditioned pain modulation effect compared to a phasic heat test stimulus
Pain Rep, 2 (6), e626
DOI 10.1097/PR9.0000000000000626, PubMed 29392240

Lønne G, Schoenfeld AJ, Cha TD, Nygaard ØP, Zwart JAH, Solberg T (2017)
Variation in selection criteria and approaches to surgery for Lumbar Spinal Stenosis among patients treated in Boston and Norway
Clin Neurol Neurosurg, 156, 77-82
DOI 10.1016/j.clineuro.2017.03.008, PubMed 28359979

Stensland SØ, Zwart JA, Wentzel-Larsen T, Dyb G (2017)
The headache of terror: A matched cohort study of adolescents from the Utøya and the HUNT Study
Neurology, 90 (2), e111-e118
DOI 10.1212/WNL.0000000000004805, PubMed 29237795

Storheim K, Espeland A, Grøvle L, Skouen JS, Aßmus J, Anke A, Froholdt A, Pedersen LM, Haugen AJ, Fors T, Schistad E, Lutro O, Marchand GH, Kadar T, Vetti N, Randen S, Nygaard ØP, Brox JI, Grotle M, Zwart JA (2017)
Antibiotic treatment In patients with chronic low back pain and Modic changes (the AIM study): study protocol for a randomised controlled trial
Trials, 18 (1), 596
DOI 10.1186/s13063-017-2306-8, PubMed 29246188

Wiedmann MKH, Brunborg C, Di Ieva A, Lindemann K, Johannesen TB, Vatten L, Helseth E, Zwart JA (2017)
The impact of body mass index and height on the risk for glioblastoma and other glioma subgroups: a large prospective cohort study
Neuro Oncol, 19 (7), 976-985
DOI 10.1093/neuonc/now272, PubMed 28040713

Wiedmann MKH, Brunborg C, Di Ieva A, Lindemann K, Johannesen TB, Vatten L, Helseth E, Zwart JA (2017)
Overweight, obesity and height as risk factors for meningioma, glioma, pituitary adenoma and nerve sheath tumor: a large population-based prospective cohort study
Acta Oncol, 56 (10), 1302-1309
DOI 10.1080/0284186X.2017.1330554, PubMed 28548875

Winsvold BS, Bettella F, Witoelar A, Anttila V, Gormley P, Kurth T, Terwindt GM, Freilinger TM, Frei O, Shadrin A, Wang Y, Dale AM, van den Maagdenberg AMJM, Chasman DI, Nyholt DR, Palotie A, Andreassen OA, Zwart JA, International Headache Genetics Consortium (2017)
Shared genetic risk between migraine and coronary artery disease: A genome-wide analysis of common variants
PLoS One, 12 (9), e0185663
DOI 10.1371/journal.pone.0185663, PubMed 28957430

Winsvold BS, Palta P, Eising E, Page CM, International Headache Genetics Consortium, van den Maagdenberg AM, Palotie A, Zwart JA (2017)
Epigenetic DNA methylation changes associated with headache chronification: A retrospective case-control study
Cephalalgia, 38 (2), 312-322
DOI 10.1177/0333102417690111, PubMed 28103696

Publications 2016

Eising E, Huisman SMH, Mahfouz A, Vijfhuizen LS, Anttila V, Winsvold BS, Kurth T, Ikram MA, Freilinger T, Kaprio J, Boomsma DI, van Duijn CM, Järvelin MR, Zwart JA, Quaye L, Strachan DP, Kubisch C, Dichgans M, Davey Smith G, Stefansson K, Palotie A, Chasman DI, Ferrari MD, Terwindt GM, de Vries B et al. (2016)
Gene co-expression analysis identifies brain regions and cell types involved in migraine pathophysiology: a GWAS-based study using the Allen Human Brain Atlas
Hum Genet, 135 (4), 425-439
DOI 10.1007/s00439-016-1638-x, PubMed 26899160

Gormley P, Anttila V, Winsvold BS, Palta P, Esko T, Pers TH, Farh KH, Cuenca-Leon E, Muona M, Furlotte NA, Kurth T, Ingason A, McMahon G, Ligthart L, Terwindt GM, Kallela M, Freilinger TM, Ran C, Gordon SG, Stam AH, Steinberg S, Borck G, Koiranen M, Quaye L, Adams HH et al. (2016)
Meta-analysis of 375,000 individuals identifies 38 susceptibility loci for migraine
Nat Genet, 48 (8), 856-66
DOI 10.1038/ng.3598, PubMed 27322543

Gormley P, Anttila V, Winsvold BS, Palta P, Esko T, Pers TH, Farh KH, Cuenca-Leon E, Muona M, Furlotte NA, Kurth T, Ingason A, McMahon G, Ligthart L, Terwindt GM, Kallela M, Freilinger TM, Ran C, Gordon SG, Stam AH, Steinberg S, Borck G, Koiranen M, Quaye L, Adams HH et al. (2016)
Corrigendum: Meta-analysis of 375,000 individuals identifies 38 susceptibility loci for migraine
Nat Genet, 48 (10), 1296
DOI 10.1038/ng1016-1296c, PubMed 27681292

Gustavsen MW, Celius EG, Winsvold BS, Moen SM, Nygaard GO, Berg-Hansen P, Lie BA, Zwart JA, Harbo HF (2016)
Migraine and frequent tension-type headache are not associated with multiple sclerosis in a Norwegian case-control study
Mult Scler J Exp Transl Clin, 2, 2055217316682976
DOI 10.1177/2055217316682976, PubMed 28607748

Heuch I, Heuch I, Hagen K, Zwart JA (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, 16, 306
DOI 10.1186/s12889-016-2970-8, PubMed 27068452

Johnsen MB, Guddal MH, Småstuen MC, Moksnes H, Engebretsen L, Storheim K, Zwart JA (2016)
Sport Participation and the Risk of Anterior Cruciate Ligament Reconstruction in Adolescents: A Population-based Prospective Cohort Study (The Young-HUNT Study)
Am J Sports Med, 44 (11), 2917-2924
DOI 10.1177/0363546516643807, PubMed 27159313

Johnsen MB, Hellevik AI, Baste V, Furnes O, Langhammer A, Flugsrud G, Nordsletten L, Zwart JA, Storheim K (2016)
Leisure time physical activity and the risk of hip or knee replacement due to primary osteoarthritis: a population based cohort study (The HUNT Study)
BMC Musculoskelet Disord, 17, 86
DOI 10.1186/s12891-016-0937-7, PubMed 26879518

Sundseth J, Fredriksli OA, Kolstad F, Johnsen LG, Pripp AH, Andresen H, Myrseth E, Müller K, Nygaard ØP, Zwart JA, NORCAT study group (2016)
The Norwegian Cervical Arthroplasty Trial (NORCAT): 2-year clinical outcome after single-level cervical arthroplasty versus fusion-a prospective, single-blinded, randomized, controlled multicenter study
Eur Spine J, 26 (4), 1225-1235
DOI 10.1007/s00586-016-4922-5, PubMed 28012081

Sundseth J, Jacobsen EA, Kolstad F, Sletteberg RO, Nygaard OP, Johnsen LG, Pripp AH, Andresen H, Fredriksli OA, Myrseth E, Zwart JA (2016)
Heterotopic ossification and clinical outcome in nonconstrained cervical arthroplasty 2 years after surgery: the Norwegian Cervical Arthroplasty Trial (NORCAT)
Eur Spine J, 25 (7), 2271-8
DOI 10.1007/s00586-016-4549-6, PubMed 27061727

Åsberg AN, Stovner LJ, Zwart JA, Winsvold BS, Heuch I, Hagen K (2016)
Chronic musculoskeletal complaints as a predictor of mortality-The HUNT study
Pain, 157 (7), 1443-7
DOI 10.1097/j.pain.0000000000000537, PubMed 26919487

Publications 2015

Blaauw BA, Dyb G, Hagen K, Holmen TL, Linde M, Wentzel-Larsen T, Zwart JA (2015)
The relationship of anxiety, depression and behavioral problems with recurrent headache in late adolescence – a Young-HUNT follow-up study
J Headache Pain, 16, 10
DOI 10.1186/1129-2377-16-10, PubMed 25595046

Dyb G, Stensland S, Zwart JA (2015)
Psychiatric comorbidity in childhood and adolescence headache
Curr Pain Headache Rep, 19 (3), 5
DOI 10.1007/s11916-015-0479-y, PubMed 25754599

Heuch I, Heuch I, Hagen K, Zwart JA (2015)
Association between body height and chronic low back pain: a follow-up in the Nord-Trøndelag Health Study
BMJ Open, 5 (6), e006983
DOI 10.1136/bmjopen-2014-006983, PubMed 26078308

Heuch I, Heuch I, Hagen K, Zwart JA (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, 10 (10), e0141268
DOI 10.1371/journal.pone.0141268, PubMed 26506618

Kvalheim S, Sandvik L, Winsvold B, Hagen K, Zwart JA (2015)
Early menarche and chronic widespread musculoskeletal complaints--Results from the HUNT study
Eur J Pain, 20 (3), 458-64
DOI 10.1002/ejp.747, PubMed 26132558

Laurell K, Artto V, Bendtsen L, Hagen K, Häggström J, Linde M, Söderström L, Tronvik E, Wessman M, Zwart JA, Kallela M (2015)
Premonitory symptoms in migraine: A cross-sectional study in 2714 persons
Cephalalgia, 36 (10), 951-9
DOI 10.1177/0333102415620251, PubMed 26643378

Lønne G, Johnsen LG, Rossvoll I, Andresen H, Storheim K, Zwart JA, Nygaard ØP (2015)
Minimally invasive decompression versus x-stop in lumbar spinal stenosis: a randomized controlled multicenter study
Spine (Phila Pa 1976), 40 (2), 77-85
DOI 10.1097/BRS.0000000000000691, PubMed 25575084

Malik R, Freilinger T, Winsvold BS, Anttila V, Vander Heiden J, Traylor M, de Vries B, Holliday EG, Terwindt GM, Sturm J, Bis JC, Hopewell JC, Ferrari MD, Rannikmae K, Wessman M, Kallela M, Kubisch C, Fornage M, Meschia JF, Lehtimäki T, Sudlow C, Clarke R, Chasman DI, Mitchell BD, Maguire J et al. (2015)
Shared genetic basis for migraine and ischemic stroke: A genome-wide analysis of common variants
Neurology, 84 (21), 2132-45
DOI 10.1212/WNL.0000000000001606, PubMed 25934857

Srinivasan S, Bettella F, Mattingsdal M, Wang Y, Witoelar A, Schork AJ, Thompson WK, Zuber V, Schizophrenia Working Group of the Psychiatric Genomics Consortium, The International Headache Genetics Consortium, Winsvold BS, Zwart JA, Collier DA, Desikan RS, Melle I, Werge T, Dale AM, Djurovic S, Andreassen OA (2015)
Genetic Markers of Human Evolution Are Enriched in Schizophrenia
Biol Psychiatry, 80 (4), 284-292
DOI 10.1016/j.biopsych.2015.10.009, PubMed 26681495

Stræte Røttereng AK, Bosnes O, Stordal E, Zwart JA, Linde M, Stovner LJ, Hagen K (2015)
Headache as a predictor for dementia: The HUNT Study
J Headache Pain, 16, 89
DOI 10.1186/s10194-015-0573-x, PubMed 26471177

Sundseth J, Kolstad F, Johnsen LG, Pripp AH, Nygaard OP, Andresen H, Fredriksli OA, Myrseth E, Züchner M, Zwart JA (2015)
The Neck Disability Index (NDI) and its correlation with quality of life and mental health measures among patients with single-level cervical disc disease scheduled for surgery
Acta Neurochir (Wien), 157 (10), 1807-12
DOI 10.1007/s00701-015-2534-1, PubMed 26289971

Wiedmann M, Brunborg C, Lindemann K, Johannesen TB, Vatten L, Helseth E, Zwart JA (2015)
Smoking, obesity and the risk of pituitary adenoma: a large prospective cohort study (The HUNT Study)
Eur J Epidemiol, 31 (1), 95-8
DOI 10.1007/s10654-015-0033-6, PubMed 25903163

Winsvold BS, Nelson CP, Malik R, Gormley P, Anttila V, Vander Heiden J, Elliott KS, Jacobsen LM, Palta P, Amin N, de Vries B, Hämäläinen E, Freilinger T, Ikram MA, Kessler T, Koiranen M, Ligthart L, McMahon G, Pedersen LM, Willenborg C, Won HH, Olesen J, Artto V, Assimes TL, Blankenberg S et al. (2015)
Genetic analysis for a shared biological basis between migraine and coronary artery disease
Neurol Genet, 1 (1), e10
DOI 10.1212/NXG.0000000000000010, PubMed 27066539

Zhang J, Geerts C, Hukkelhoven C, Offerhaus P, Zwart J, de Jonge A (2015)
Caesarean section rates in subgroups of women and perinatal outcomes
BJOG, 123 (5), 754-61
DOI 10.1111/1471-0528.13520, PubMed 26216434

Zhao H, Eising E, de Vries B, Vijfhuizen LS, International Headache Genetics Consortium, Anttila V, Winsvold BS, Kurth T, Stefansson H, Kallela M, Malik R, Stam AH, Ikram MA, Ligthart L, Freilinger T, Alexander M, Müller-Myhsok B, Schreiber S, Meitinger T, Aromas A, Eriksson JG, Boomsma DI, van Duijn CM, Zwart JA, Quaye L et al. (2015)
Gene-based pleiotropy across migraine with aura and migraine without aura patient groups
Cephalalgia, 36 (7), 648-57
DOI 10.1177/0333102415591497, PubMed 26660531

Åsberg AN, Stovner LJ, Zwart JA, Winsvold BS, Heuch I, Hagen K (2015)
Migraine as a predictor of mortality: The HUNT study
Cephalalgia, 36 (4), 351-7
DOI 10.1177/0333102415593090, PubMed 26115666

Publications 2014

Blaauw BA, Dyb G, Hagen K, Holmen TL, Linde M, Wentzel-Larsen T, Zwart JA (2014)
Anxiety, depression and behavioral problems among adolescents with recurrent headache: the Young-HUNT study
J Headache Pain, 15, 38
DOI 10.1186/1129-2377-15-38, PubMed 24925252

Fagernæs CF, Heuch I, Zwart JA, Winsvold BS, Linde M, Hagen K (2014)
Blood pressure as a risk factor for headache and migraine: a prospective population-based study
Eur J Neurol, 22 (1), 156-62, e10-1
DOI 10.1111/ene.12547, PubMed 25155744

Grotle M, Solberg T, Storheim K, Lærum E, Zwart JA (2014)
Public and private health service in Norway: a comparison of patient characteristics and surgery criteria for patients with nerve root affections due to discus herniation
Eur Spine J, 23 (9), 1984-91
DOI 10.1007/s00586-014-3293-z, PubMed 24898309

Heuch I, Heuch I, Hagen K, Zwart JA (2014)
Do abnormal serum lipid levels increase the risk of chronic low back pain? The Nord-Trøndelag Health Study
PLoS One, 9 (9), e108227
DOI 10.1371/journal.pone.0108227, PubMed 25233233

Louter MA, Fernandez-Morales J, de Vries B, Winsvold B, Anttila V, Fernandez-Cadenas I, Vila-Pueyo M, Sintas C, van Duijn CM, Cormand B, Álvarez-Sabin J, Montaner J, Ferrari MD, van den Maagdenberg A, Palotie A, Zwart JA, Macaya A, Terwindt GM, Pozo-Rosich P (2014)
Candidate-gene association study searching for genetic factors involved in migraine chronification
Cephalalgia, 35 (6), 500-7
DOI 10.1177/0333102414547141, PubMed 25169732

Nyholt DR, International Headache Genetics Consortium, Anttila V, Winsvold BS, Kurth T, Stefansson H, Kallela M, Malik R, Vries Bd, Terwindt GM, Ikram MA, Stam AH, Ligthart L, Freilinger T, Alexander M, Muller-Myhsok B, Schreiber S, Meitinger T, Aromaa A, Eriksson JG, Kaprio J, Boomsma DI, Duijn Cv, Raitakari O, Järvelin MR et al. (2014)
Concordance of genetic risk across migraine subgroups: Impact on current and future genetic association studies
Cephalalgia, 35 (6), 489-99
DOI 10.1177/0333102414547784, PubMed 25179292

Stensland SO, Thoresen S, Wentzel-Larsen T, Zwart JA, Dyb G (2014)
Recurrent headache and interpersonal violence in adolescence: the roles of psychological distress, loneliness and family cohesion: the HUNT study
J Headache Pain, 15, 35
DOI 10.1186/1129-2377-15-35, PubMed 24912800

Storheim K, Zwart JA (2014)
Musculoskeletal disorders and the Global Burden of Disease study
Ann Rheum Dis, 73 (6), 949-50
DOI 10.1136/annrheumdis-2014-205327, PubMed 24790065

Tronvik E, Sørensen T, Linde M, Bendtsen L, Artto V, Laurell K, Kallela M, Zwart JA, Hagen K (2014)
The relationship between headache and religious attendance (the Nord-Trøndelag health study-HUNT)
J Headache Pain, 15, 1
DOI 10.1186/1129-2377-15-1, PubMed 24386923

Publications 2013

Anttila V, Winsvold BS, Gormley P, Kurth T, Bettella F, McMahon G, Kallela M, Malik R, de Vries B, Terwindt G, Medland SE, Todt U, McArdle WL, Quaye L, Koiranen M, Ikram MA, Lehtimäki T, Stam AH, Ligthart L, Wedenoja J, Dunham I, Neale BM, Palta P, Hamalainen E, Schürks M et al. (2013)
Genome-wide meta-analysis identifies new susceptibility loci for migraine
Nat Genet, 45 (8), 912-917
DOI 10.1038/ng.2676, PubMed 23793025

Hagen K, Stordal E, Linde M, Steiner TJ, Zwart JA, Stovner LJ (2013)
Headache as a risk factor for dementia: a prospective population-based study
Cephalalgia, 34 (5), 327-35
DOI 10.1177/0333102413513181, PubMed 24265286

Heuch I, Heuch I, Hagen K, Zwart JA (2013)
Does high blood pressure reduce the risk of chronic low back pain? The Nord-Trøndelag Health Study
Eur J Pain, 18 (4), 590-8
DOI 10.1002/j.1532-2149.2013.00398.x, PubMed 24019262

Heuch I, Heuch I, Hagen K, Zwart JA (2013)
Body mass index as a risk factor for developing chronic low back pain: a follow-up in the Nord-Trøndelag Health Study
Spine (Phila Pa 1976), 38 (2), 133-9
DOI 10.1097/BRS.0b013e3182647af2, PubMed 22718225

Jacobsen LM, Winsvold BS, Romundstad S, Pripp AH, Holmen J, Zwart JA (2013)
Urinary albumin excretion as a marker of endothelial dysfunction in migraine sufferers: the HUNT study, Norway
BMJ Open, 3 (8)
DOI 10.1136/bmjopen-2013-003268, PubMed 23943777

Kvalheim S, Sandven I, Hagen K, Zwart JA (2013)
Smoking as a risk factor for chronic musculoskeletal complaints is influenced by age. The HUNT study
Pain, 154 (7), 1073-9
DOI 10.1016/j.pain.2013.03.015, PubMed 23623251

Stensland SØ, Dyb G, Thoresen S, Wentzel-Larsen T, Zwart JA (2013)
Potentially traumatic interpersonal events, psychological distress and recurrent headache in a population-based cohort of adolescents: the HUNT study
BMJ Open, 3 (7)
DOI 10.1136/bmjopen-2013-002997, PubMed 23901028

Sundseth J, Jacobsen EA, Kolstad F, Nygaard OP, Zwart JA, Hol PK (2013)
Magnetic resonance imaging evaluation after implantation of a titanium cervical disc prosthesis: a comparison of 1.5 and 3 Tesla magnet strength
Eur Spine J, 22 (10), 2296-302
DOI 10.1007/s00586-013-2994-z, PubMed 24061966

Tronvik E, Wienecke T, Monstad I, Dahløf C, Bøe MG, Tjensvoll AB, Salvesen R, Zwart JA, Jansson SO, Stovner LJ (2013)
Randomised trial on episodic cluster headache with an angiotensin II receptor blocker
Cephalalgia, 33 (12), 1026-34
DOI 10.1177/0333102413484989, PubMed 23598371

Wiedmann M, Brunborg C, Lindemann K, Johannesen TB, Vatten L, Helseth E, Zwart JA (2013)
Body mass index and the risk of meningioma, glioma and schwannoma in a large prospective cohort study (The HUNT Study)
Br J Cancer, 109 (1), 289-94
DOI 10.1038/bjc.2013.304, PubMed 23778522

Winsvold BS, Sandven I, Hagen K, Linde M, Midthjell K, Zwart JA (2013)
Migraine, headache and development of metabolic syndrome: an 11-year follow-up in the Nord-Trøndelag Health Study (HUNT)
Pain, 154 (8), 1305-11
DOI 10.1016/j.pain.2013.04.007, PubMed 23726372

Ødegård SS, Sand T, Engstrøm M, Zwart JA, Hagen K (2013)
The impact of headache and chronic musculoskeletal complaints on the risk of insomnia: longitudinal data from the Nord-Trøndelag health study
J Headache Pain, 14, 24
DOI 10.1186/1129-2377-14-24, PubMed 23566158

Publications 2012

Boraska V, Day-Williams A, Franklin CS, Elliott KS, Panoutsopoulou K, Tachmazidou I, Albrecht E, Bandinelli S, Beilin LJ, Bochud M, Cadby G, Ernst F, Evans DM, Hayward C, Hicks AA, Huffman J, Huth C, James AL, Klopp N, Kolcic I, Kutalik Z, Lawlor DA, Musk AW, Pehlic M, Pennell CE et al. (2012)
Genome-wide association study to identify common variants associated with brachial circumference: a meta-analysis of 14 cohorts
PLoS One, 7 (3), e31369
DOI 10.1371/journal.pone.0031369, PubMed 22479309

Freilinger T, Anttila V, de Vries B, Malik R, Kallela M, Terwindt GM, Pozo-Rosich P, Winsvold B, Nyholt DR, van Oosterhout WP, Artto V, Todt U, Hämäläinen E, Fernández-Morales J, Louter MA, Kaunisto MA, Schoenen J, Raitakari O, Lehtimäki T, Vila-Pueyo M, Göbel H, Wichmann E, Sintas C, Uitterlinden AG, Hofman A et al. (2012)
Genome-wide association analysis identifies susceptibility loci for migraine without aura
Nat Genet, 44 (7), 777-82
DOI 10.1038/ng.2307, PubMed 22683712

Hagen K, Linde M, Steiner TJ, Zwart JA, Stovner LJ (2012)
The bidirectional relationship between headache and chronic musculoskeletal complaints: an 11-year follow-up in the Nord-Trøndelag Health Study (HUNT)
Eur J Neurol, 19 (11), 1447-54
DOI 10.1111/j.1468-1331.2012.03725.x, PubMed 22519547

Johnson M, Brennecke S, Iversen AC, East C, Olsen G, Kent J, Dyer T, Said J, Roten L, Abraham L, Zwart JA, Winsvold B, Håberg A, Huentelman M, Krokan H, Gabrielsen M, Austgulen R, Blangero J, Moses E (2012)
OS046. Genome-wide association scans identify novel maternalsusceptibility loci for preeclampsia
Pregnancy Hypertens, 2 (3), 202
DOI 10.1016/j.preghy.2012.04.047, PubMed 26105260

Publications 2011

Aegidius KL, Zwart JA, Hagen K, Dyb G, Holmen TL, Stovner LJ (2011)
Increased headache prevalence in female adolescents and adult women with early menarche. The Head-HUNT Studies
Eur J Neurol, 18 (2), 321-8
DOI 10.1111/j.1468-1331.2010.03143.x, PubMed 20636369

Hagen K, Albretsen C, Vilming ST, Salvesen R, Grønning M, Helde G, Gravdahl G, Zwart JA, Stovner LJ (2011)
A 4-year follow-up of patients with medication-overuse headache previously included in a randomized multicentre study
J Headache Pain, 12 (3), 315-22
DOI 10.1007/s10194-010-0285-1, PubMed 21207237

Hagen K, Linde M, Heuch I, Stovner LJ, Zwart JA (2011)
Increasing prevalence of chronic musculoskeletal complaints. A large 11-year follow-up in the general population (HUNT 2 and 3)
Pain Med, 12 (11), 1657-66
DOI 10.1111/j.1526-4637.2011.01240.x, PubMed 21939496

Hagen K, Linde M, Steiner TJ, Stovner LJ, Zwart JA (2011)
Risk factors for medication-overuse headache: an 11-year follow-up study. The Nord-Trøndelag Health Studies
Pain, 153 (1), 56-61
DOI 10.1016/j.pain.2011.08.018, PubMed 22018971

Hoftun GB, Romundstad PR, Zwart JA, Rygg M (2011)
Chronic idiopathic pain in adolescence--high prevalence and disability: the young HUNT Study 2008
Pain, 152 (10), 2259-66
DOI 10.1016/j.pain.2011.05.007, PubMed 21683528

Laurell K, Artto V, Bendtsen L, Hagen K, Kallela M, Meyer EL, Putaala J, Tronvik E, Zwart JA, Linde M (2011)
Migrainous infarction: a Nordic multicenter study
Eur J Neurol, 18 (10), 1220-6
DOI 10.1111/j.1468-1331.2011.03364.x, PubMed 21414105

Myran R, Hagen K, Svebak S, Nygaard O, Zwart JA (2011)
Headache and musculoskeletal complaints among subjects with self reported whiplash injury: the HUNT-2 study
BMC Musculoskelet Disord, 12, 129
DOI 10.1186/1471-2474-12-129, PubMed 21651816

Myran R, Zwart JA, Kvistad KA, Folvik M, Lydersen S, Ro M, Woodhouse A, Nygaard OP (2011)
Clinical characteristics, pain, and disability in relation to alar ligament MRI findings
Spine (Phila Pa 1976), 36 (13), E862-7
DOI 10.1097/BRS.0b013e3181ff1dde, PubMed 21289550

Odegård SS, Sand T, Engstrøm M, Stovner LJ, Zwart JA, Hagen K (2011)
The long-term effect of insomnia on primary headaches: a prospective population-based cohort study (HUNT-2 and HUNT-3)
Headache, 51 (4), 570-80
DOI 10.1111/j.1526-4610.2011.01859.x, PubMed 21457241

Tronvik E, Zwart JA, Hagen K, Dyb G, Holmen TL, Stovner LJ (2011)
Association between blood pressure measures and recurrent headache in adolescents: cross-sectional data from the HUNT-Youth study
J Headache Pain, 12 (3), 347-53
DOI 10.1007/s10194-011-0304-x, PubMed 21301921

Publications 2010

Anttila V, Stefansson H, Kallela M, Todt U, Terwindt GM, Calafato MS, Nyholt DR, Dimas AS, Freilinger T, Müller-Myhsok B, Artto V, Inouye M, Alakurtti K, Kaunisto MA, Hämäläinen E, de Vries B, Stam AH, Weller CM, Heinze A, Heinze-Kuhn K, Goebel I, Borck G, Göbel H, Steinberg S, Wolf C et al. (2010)
Genome-wide association study of migraine implicates a common susceptibility variant on 8q22.1
Nat Genet, 42 (10), 869-73
DOI 10.1038/ng.652, PubMed 20802479

Heuch I, Hagen K, Heuch I, Nygaard Ø, Zwart JA (2010)
The impact of body mass index on the prevalence of low back pain: the HUNT study
Spine (Phila Pa 1976), 35 (7), 764-8
DOI 10.1097/BRS.0b013e3181ba1531, PubMed 20228714

Heuch I, Heuch I, Hagen K, Zwart JA (2010)
Associations between serum lipid levels and chronic low back pain
Epidemiology, 21 (6), 837-41
DOI 10.1097/EDE.0b013e3181f20808, PubMed 20798637

Linde M, Stovner LJ, Zwart JA, Hagen K (2010)
Time trends in the prevalence of headache disorders. The Nord-Trondelag Health Studies (HUNT 2 and HUNT 3)
Cephalalgia, 31 (5), 585-96
DOI 10.1177/0333102410391488, PubMed 21123626

Nygaard ØP, Rø M, Andersen TI, Zwart JA (2010)
[Neck pain with and without affection of nerve roots]
Tidsskr Nor Laegeforen, 130 (22), 2252-5
DOI 10.4045/tidsskr.09.1285, PubMed 21109848

Robberstad L, Dyb G, Hagen K, Stovner LJ, Holmen TL, Zwart JA (2010)
An unfavorable lifestyle and recurrent headaches among adolescents: the HUNT study
Neurology, 75 (8), 712-7
DOI 10.1212/WNL.0b013e3181eee244, PubMed 20720191

Stovner LJ, Gjerstad L, Gilhus NE, Storstein A, Zwart JA (2010)
Cost of disorders of the brain in Norway
Acta Neurol Scand Suppl (190), 1-5
DOI 10.1111/j.1600-0404.2010.01367.x, PubMed 20586727

Winsvold BS, Hagen K, Aamodt AH, Stovner LJ, Holmen J, Zwart JA (2010)
Headache, migraine and cardiovascular risk factors: the HUNT study
Eur J Neurol, 18 (3), 504-11
DOI 10.1111/j.1468-1331.2010.03199.x, PubMed 20825470

Ødegård SS, Engstrøm M, Sand T, Stovner LJ, Zwart JA, Hagen K (2010)
Associations between sleep disturbance and primary headaches: the third Nord-Trøndelag Health Study
J Headache Pain, 11 (3), 197-206
DOI 10.1007/s10194-010-0201-8, PubMed 20224943

Publications 2009

Aegidius K, Zwart JA, Hagen K, Stovner L (2009)
The effect of pregnancy and parity on headache prevalence: the Head-HUNT study
Headache, 49 (6), 851-9
DOI 10.1111/j.1526-4610.2009.01438.x, PubMed 19545250

Hagen K, Thoresen K, Stovner LJ, Zwart JA (2009)
High dietary caffeine consumption is associated with a modest increase in headache prevalence: results from the Head-HUNT Study
J Headache Pain, 10 (3), 153-9
DOI 10.1007/s10194-009-0114-6, PubMed 19308315

Hagen K, Zwart JA, Aamodt AH, Nilsen KB, Bråthen G, Helde G, Stjern M, Tronvik EA, Stovner LJ (2009)
The validity of questionnaire-based diagnoses: the third Nord-Trøndelag Health Study 2006-2008
J Headache Pain, 11 (1), 67-73
DOI 10.1007/s10194-009-0174-7, PubMed 19946790

Meyer EL, Laurell K, Artto V, Bendtsen L, Linde M, Kallela M, Tronvik E, Zwart JA, Jensen RM, Hagen K (2009)
Lateralization in cluster headache: a Nordic multicenter study
J Headache Pain, 10 (4), 259-63
DOI 10.1007/s10194-009-0129-z, PubMed 19495933

Publications 2008

Baekken PM, Skorpen F, Stordal E, Zwart JA, Hagen K (2008)
Depression and anxiety in relation to catechol-O-methyltransferase Val158Met genotype in the general population: the Nord-Trøndelag Health Study (HUNT)
BMC Psychiatry, 8, 48
DOI 10.1186/1471-244X-8-48, PubMed 18578865

Hagen K, Albretsen C, Vilming ST, Salvesen R, Grønning M, Helde G, Gravdahl G, Zwart JA, Stovner LJ (2008)
Management of medication overuse headache: 1-year randomized multicentre open-label trial
Cephalalgia, 29 (2), 221-32
DOI 10.1111/j.1468-2982.2008.01711.x, PubMed 18823363

Hagen K, Stovner LJ, Skorpen F, Pettersen E, Zwart JA (2008)
COMT genotypes and use of antipsychotic medication: linking population-based prescription database to the HUNT study
Pharmacoepidemiol Drug Saf, 17 (4), 372-7
DOI 10.1002/pds.1567, PubMed 18302304

Hagen K, Zwart JA, Aamodt AH, Nilsen KB, Bråthen G, Helde G, Stjern M, Tronvik EA, Stovner LJ (2008)
A face-to-face interview of participants in HUNT 3: the impact of the screening question on headache prevalence
J Headache Pain, 9 (5), 289-94
DOI 10.1007/s10194-008-0062-6, PubMed 18690490

Hoff OM, Midthjell K, Zwart JA, Hagen K (2008)
The association between diabetes mellitus, glucose, and chronic musculoskeletal complaints. Results from the Nord-Trøndelag Health Study
BMC Musculoskelet Disord, 9, 160
DOI 10.1186/1471-2474-9-160, PubMed 19055732

Holth HS, Werpen HK, Zwart JA, Hagen K (2008)
Physical inactivity is associated with chronic musculoskeletal complaints 11 years later: results from the Nord-Trøndelag Health Study
BMC Musculoskelet Disord, 9, 159
DOI 10.1186/1471-2474-9-159, PubMed 19046448

Myran R, Kvistad KA, Nygaard OP, Andresen H, Folvik M, Zwart JA (2008)
Magnetic resonance imaging assessment of the alar ligaments in whiplash injuries: a case-control study
Spine (Phila Pa 1976), 33 (18), 2012-6
DOI 10.1097/BRS.0b013e31817bb0bd, PubMed 18708935

Tronvik E, Stovner LJ, Hagen K, Holmen J, Zwart JA (2008)
High pulse pressure protects against headache: prospective and cross-sectional data (HUNT study)
Neurology, 70 (16), 1329-36
DOI 10.1212/01.wnl.0000309222.79376.57, PubMed 18413586

Varkey E, Hagen K, Zwart JA, Linde M (2008)
Physical activity and headache: results from the Nord-Trøndelag Health Study (HUNT)
Cephalalgia, 28 (12), 1292-7
DOI 10.1111/j.1468-2982.2008.01678.x, PubMed 18771495

Aamodt AH, Stovner LJ, Hagen K, Zwart JA (2008)
Comorbidity of headache and gastrointestinal complaints. The Head-HUNT Study
Cephalalgia, 28 (2), 144-51
DOI 10.1111/j.1468-2982.2007.01486.x, PubMed 18197884

Publications 2007

Aegidius KL, Zwart JA, Hagen K, Schei B, Stovner LJ (2007)
Hormone replacement therapy and headache prevalence in postmenopausal women. The Head-HUNT study
Eur J Neurol, 14 (1), 73-8
DOI 10.1111/j.1468-1331.2006.01557.x, PubMed 17222117

Ertresvg JM, Stovner LJ, Kvavik LE, Johnsen HJ, Zwart JA, Helde G, Bovim G (2007)
Migraine aura or transient ischemic attacks? A five-year follow-up case-control study of women with transient central nervous system disorders in pregnancy
BMC Med, 5, 19
DOI 10.1186/1741-7015-5-19, PubMed 17640340

Hagen K, Pettersen E, Stovner LJ, Skorpen F, Holmen J, Zwart JA (2007)
High systolic blood pressure is associated with Val/Val genotype in the catechol-o-methyltransferase gene. The Nord-Trøndelag Health Study (HUNT)
Am J Hypertens, 20 (1), 21-6
DOI 10.1016/j.amjhyper.2006.05.023, PubMed 17198907

Hagen K, Stovner LJ, Skorpen F, Pettersen E, Zwart JA (2007)
The impact of the catechol-O-methyltransferase Val158Met polymorphism on survival in the general population--the HUNT study
BMC Med Genet, 8, 34
DOI 10.1186/1471-2350-8-34, PubMed 17577421

Hagen K, Stovner LJ, Zwart JA (2007)
Potentials and pitfalls in analytical headache epidemiological studies--lessons to be learned from the Head-HUNT study
Cephalalgia, 27 (5), 403-13
DOI 10.1111/j.1468-2982.2007.01302.x, PubMed 17448178

Stovner Lj, Hagen K, Jensen R, Katsarava Z, Lipton R, Scher A, Steiner T, Zwart JA (2007)
The global burden of headache: a documentation of headache prevalence and disability worldwide
Cephalalgia, 27 (3), 193-210
DOI 10.1111/j.1468-2982.2007.01288.x, PubMed 17381554

Aamodt AH, Stovner LJ, Langhammer A, Hagen K, Zwart JA (2007)
Is headache related to asthma, hay fever, and chronic bronchitis? The Head-HUNT Study
Headache, 47 (2), 204-12
DOI 10.1111/j.1526-4610.2006.00597.x, PubMed 17300360

Aamodt AH, Stovner LJ, Midthjell K, Hagen K, Zwart JA (2007)
Headache prevalence related to diabetes mellitus. The Head-HUNT study
Eur J Neurol, 14 (7), 738-44
DOI 10.1111/j.1468-1331.2007.01765.x, PubMed 17594328

Publications 2006

Aegidius K, Zwart JA, Hagen K, Schei B, Stovner LJ (2006)
Oral contraceptives and increased headache prevalence: the Head-HUNT Study
Neurology, 66 (3), 349-53
DOI 10.1212/01.wnl.0000196481.57994.09, PubMed 16476933

Dyb G, Holmen TL, Zwart JA (2006)
Analgesic overuse among adolescents with headache: the Head-HUNT-Youth Study
Neurology, 66 (2), 198-201
DOI 10.1212/01.wnl.0000193630.03650.19, PubMed 16434653

Fiane I, Haugland ME, Stovner LJ, Zwart JA, Bovim G, Hagen K (2006)
Sick leave is related to frequencies of migraine and non-migrainous headache--The HUNT Study
Cephalalgia, 26 (8), 960-7
DOI 10.1111/j.1468-2982.2006.01151.x, PubMed 16886932

Hagen K, Pettersen E, Stovner LJ, Skorpen F, Zwart JA (2006)
No association between chronic musculoskeletal complaints and Val158Met polymorphism in the Catechol-O-methyltransferase gene. The HUNT study
BMC Musculoskelet Disord, 7, 40
DOI 10.1186/1471-2474-7-40, PubMed 16674809

Hagen K, Pettersen E, Stovner LJ, Skorpen F, Zwart JA (2006)
The association between headache and Val158Met polymorphism in the catechol-O-methyltransferase gene: the HUNT Study
J Headache Pain, 7 (2), 70-4
DOI 10.1007/s10194-006-0281-7, PubMed 16688411

Hagen K, Svebak S, Zwart JA (2006)
Incidence of musculoskeletal complaints in a large adult Norwegian county population. The HUNT Study
Spine (Phila Pa 1976), 31 (18), 2146-50
DOI 10.1097/01.brs.0000231734.56161.6b, PubMed 16915104

Oedegaard KJ, Neckelmann D, Mykletun A, Dahl AA, Zwart JA, Hagen K, Fasmer OB (2006)
Migraine with and without aura: association with depression and anxiety disorder in a population-based study. The HUNT Study
Cephalalgia, 26 (1), 1-6
DOI 10.1111/j.1468-2982.2005.00974.x, PubMed 16396660

Sand T, Møll-Nilsen B, Zwart JA (2006)
Blink reflex R2 amplitudes in cervicogenic headache, chronic tension-type headache and migraine
Cephalalgia, 26 (10), 1186-91
DOI 10.1111/j.1468-2982.2006.01189.x, PubMed 16961784

Stovner LJ, Zwart JA, Hagen K, Terwindt GM, Pascual J (2006)
Epidemiology of headache in Europe
Eur J Neurol, 13 (4), 333-45
DOI 10.1111/j.1468-1331.2006.01184.x, PubMed 16643310

Svebak S, Hagen K, Zwart JA (2006)
One-year prevalence of chronic musculoskeletal pain in a large adult Norwegian county population: Relations with age and gender - The HUNT Study
J. Musculoskelet. Pain, 14 (1), 21-28

Aamodt AH, Stovner LJ, Hagen K, Bråthen G, Zwart J (2006)
Headache prevalence related to smoking and alcohol use. The Head-HUNT Study
Eur J Neurol, 13 (11), 1233-8
DOI 10.1111/j.1468-1331.2006.01492.x, PubMed 17038038

Publications 2005

Ertresvåg JM, Zwart JA, Helde G, Johnsen HJ, Bovim G (2005)
Headache and transient focal neurological symptoms during pregnancy, a prospective cohort
Acta Neurol Scand, 111 (4), 233-7
DOI 10.1111/j.1600-0404.2005.00350.x, PubMed 15740574

Hagen K, Bjøro T, Zwart JA, Svebak S, Bovim G, Stovner LJ (2005)
Do high TSH values protect against chronic musculoskeletal complaints? The Nord-Trøndelag Health Study (HUNT)
Pain, 113 (3), 416-21
DOI 10.1016/j.pain.2004.11.022, PubMed 15661451

Hagen K, Zwart JA, Holmen J, Svebak S, Bovim G, Stovner LJ, Nord-Trøndelag Health Study (2005)
Does hypertension protect against chronic musculoskeletal complaints? The Nord-Trøndelag Health Study
Arch Intern Med, 165 (8), 916-22
DOI 10.1001/archinte.165.8.916, PubMed 15851644

Hagen K, Zwart JA, Svebak S, Bovim G, Jacob Stovner L (2005)
Low socioeconomic status is associated with chronic musculoskeletal complaints among 46,901 adults in Norway
Scand J Public Health, 33 (4), 268-75
DOI 10.1080/14034940510005699, PubMed 16087489

Nygaard ØP, Kolstad F, Kvistad KA, Zwart JA, Solberg T, Lied B, Myrseth E, Helseth E, Baardsen R (2005)
[Chronic whiplash syndrome is no indication for craniocervical fixation]
Tidsskr Nor Laegeforen, 125 (21), 2939-41
PubMed 16276376

Publications 2004

Zwart JA, Dyb G, Hagen K, Svebak S, Stovner LJ, Holmen J (2004)
Analgesic overuse among subjects with headache, neck, and low-back pain
Neurology, 62 (9), 1540-4
DOI 10.1212/01.wnl.0000123262.96132.fc, PubMed 15136678

Zwart JA, Dyb G, Holmen TL, Stovner LJ, Sand T (2004)
The prevalence of migraine and tension-type headaches among adolescents in Norway. The Nord-Trøndelag Health Study (Head-HUNT-Youth), a large population-based epidemiological study
Cephalalgia, 24 (5), 373-9
DOI 10.1111/j.1468-2982.2004.00680.x, PubMed 15096226

Aamodt AH, Borch-Iohnsen B, Hagen K, Stovner LJ, Asberg A, Zwart JA (2004)
Headache prevalence related to haemoglobin and ferritin. The HUNT Study
Cephalalgia, 24 (9), 758-62
DOI 10.1111/j.1468-2982.2004.00756.x, PubMed 15315532

Publications 2003

Bendtsen L, Mattsson P, Zwart JA, Lipton RB (2003)
Placebo response in clinical randomized trials of analgesics in migraine
Cephalalgia, 23 (7), 487-90
DOI 10.1046/j.1468-2982.2003.00528.x, PubMed 12950372

Zwart JA, Dyb G, Hagen K, Svebak S, Holmen J (2003)
Analgesic use: a predictor of chronic pain and medication overuse headache: the Head-HUNT Study
Neurology, 61 (2), 160-4
DOI 10.1212/01.wnl.0000069924.69078.8d, PubMed 12874392

Zwart JA, Dyb G, Hagen K, Ødegård KJ, Dahl AA, Bovim G, Stovner LJ (2003)
Depression and anxiety disorders associated with headache frequency. The Nord-Trøndelag Health Study
Eur J Neurol, 10 (2), 147-52
DOI 10.1046/j.1468-1331.2003.00551.x, PubMed 12603289

Zwart JA, Dyb G, Stovner LJ, Sand T, Holmen TL (2003)
The validity of 'recognition-based' headache diagnoses in adolescents. Data from the Nord-Trøndelag Health Study 1995-97, Head-HUNT-Youth
Cephalalgia, 23 (3), 223-9
DOI 10.1046/j.1468-2982.2003.00498.x, PubMed 12662191

Publications 2002

Gårseth M, Sonnewald U, White LR, Rød M, Nygaard Ø, Zwart JA (2002)
Metabolic changes in the cerebrospinal fluid of patients with lumbar disc herniation or spinal stenosis
J Neurosci Res, 69 (5), 692-5
DOI 10.1002/jnr.10357, PubMed 12210836

Hagen K, Einarsen C, Zwart JA, Svebak S, Bovim G (2002)
The co-occurrence of headache and musculoskeletal symptoms amongst 51 050 adults in Norway
Eur J Neurol, 9 (5), 527-33
DOI 10.1046/j.1468-1331.2002.00451.x, PubMed 12220386

Hagen K, Stovner LJ, Vatten L, Holmen J, Zwart JA, Bovim G (2002)
Blood pressure and risk of headache: a prospective study of 22 685 adults in Norway
J Neurol Neurosurg Psychiatry, 72 (4), 463-6
DOI 10.1136/jnnp.72.4.463, PubMed 11909904

Hagen K, Vatten L, Stovner LJ, Zwart JA, Krokstad S, Bovim G (2002)
Low socio-economic status is associated with increased risk of frequent headache: a prospective study of 22718 adults in Norway
Cephalalgia, 22 (8), 672-9
DOI 10.1046/j.1468-2982.2002.00413.x, PubMed 12383064

Wessman M, Kallela M, Kaunisto MA, Marttila P, Sobel E, Hartiala J, Oswell G, Leal SM, Papp JC, Hämäläinen E, Broas P, Joslyn G, Hovatta I, Hiekkalinna T, Kaprio J, Ott J, Cantor RM, Zwart JA, Ilmavirta M, Havanka H, Färkkilä M, Peltonen L, Palotie A (2002)
A susceptibility locus for migraine with aura, on chromosome 4q24
Am J Hum Genet, 70 (3), 652-62
DOI 10.1086/339078, PubMed 11836652

Publications 2001

Hagen K, Bjøro T, Zwart JA, Vatten L, Stovner LJ, Bovim G (2001)
Low headache prevalence amongst women with high TSH values
Eur J Neurol, 8 (6), 693-9
DOI 10.1046/j.1468-1331.2001.00310.x, PubMed 11784355

Oldervoll LM, Rø M, Zwart JA, Svebak S (2001)
Comparison of two physical exercise programs for the early intervention of pain in the neck, shoulders and lower back in female hospital staff
J Rehabil Med, 33 (4), 156-61
DOI 10.1080/165019701750300618, PubMed 11506213

Vik A, Zwart JA, Hulleberg G, Nygaard OP (2001)
Eight year outcome after surgery for lumbar disc herniation: a comparison of reoperated and not reoperated patients
Acta Neurochir (Wien), 143 (6), 607-610; discussion 610-11
DOI 10.1007/s007010170066, PubMed 11534678

Zwart JA, Sand T (2001)
Repeatability of dermatomal warm and cold sensory thresholds in patients with sciatica
Eur Spine J, 11 (5), 441-6
DOI 10.1007/s005860100333, PubMed 12384751

Publications 2000

Gårseth M, Sonnewald U, White LR, Rød M, Zwart JA, Nygaard O, Aasly J (2000)
Proton magnetic resonance spectroscopy of cerebrospinal fluid in neurodegenerative disease: indication of glial energy impairment in Huntington chorea, but not Parkinson disease
J Neurosci Res, 60 (6), 779-82
DOI 10.1002/1097-4547(20000615)60:6<779::AID-JNR10>3.0.CO;2-M, PubMed 10861790

Hagen K, Zwart JA, Vatten L, Stovner LJ, Bovim G (2000)
Head-HUNT: validity and reliability of a headache questionnaire in a large population-based study in Norway
Cephalalgia, 20 (4), 244-51
DOI 10.1046/j.1468-2982.2000.00049.x, PubMed 10999674

Hagen K, Zwart JA, Vatten L, Stovner LJ, Bovim G (2000)
Prevalence of migraine and non-migrainous headache--head-HUNT, a large population-based study
Cephalalgia, 20 (10), 900-6
DOI 10.1046/j.1468-2982.2000.00145.x, PubMed 11304025

Vik A, Hulleberg G, Zwart JA, Nygaard OP (2000)
[Long-term follow-up after surgery for lumbar disk herniation]
Tidsskr Nor Laegeforen, 120 (24), 2868-71
PubMed 11143406

Publications 1999

Zwart JA, Iversen OJ, Sand T, Dale LG, Unsgård G (1999)
Higher levels of antibodies against the psoriasis-associated antigen pso p27 in cerebrospinal fluid from patients with low back pain and sciatica
Spine (Phila Pa 1976), 24 (4), 373-7
DOI 10.1097/00007632-199902150-00016, PubMed 10065522

Publications 1998

Becser N, Sand T, Pareja JA, Zwart JA (1998)
Thermal sensitivity in unilateral headaches
Cephalalgia, 18 (10), 675-83; discussion 657
DOI 10.1111/j.1468-2982.1998.1810675.x, PubMed 9950624

Becser N, Sand T, Zwart JA (1998)
Reliability of cephalic thermal thresholds in healthy subjects
Cephalalgia, 18 (8), 574-82
DOI 10.1046/j.1468-2982.1998.1808574.x, PubMed 9827251

Zwart J, Geisler JP, Geisler HE (1998)
Five-year survival in patients with endometrioid carcinoma of the ovary versus those with serous carcinoma
Eur J Gynaecol Oncol, 19 (3), 225-8
PubMed 9641218

Zwart JA, Sand T, Unsgaard G (1998)
Warm and cold sensory thresholds in patients with unilateral sciatica: C fibers are more severely affected than A-delta fibers
Acta Neurol Scand, 97 (1), 41-5
DOI 10.1111/j.1600-0404.1998.tb00607.x, PubMed 9482677

Publications 1997

Sand T, Zwart JA, Helde G, Bovim G (1997)
The reproducibility of cephalic pain pressure thresholds in control subjects and headache patients
Cephalalgia, 17 (7), 748-55
DOI 10.1046/j.1468-2982.1997.1707748.x, PubMed 9399004

Zwart JA (1997)
Neck mobility in different headache disorders
Headache, 37 (1), 6-11
DOI 10.1046/j.1526-4610.1997.3701006.x, PubMed 9046716

Zwart JA, Gårseth M, Sonnewald U, Dale LG, White LR, Aasly J, Unsgård G (1997)
Nuclear magnetic resonance spectroscopy of cerebrospinal fluid from patients with low back pain and sciatica
Spine (Phila Pa 1976), 22 (18), 2112-6
DOI 10.1097/00007632-199709150-00009, PubMed 9322323

Aasly J, Gårseth M, Sonnewald U, Zwart JA, White LR, Unsgård G (1997)
Cerebrospinal fluid lactate and glutamine are reduced in multiple sclerosis
Acta Neurol Scand, 95 (1), 9-12
DOI 10.1111/j.1600-0404.1997.tb00060.x, PubMed 9048978

Publications 1995

Bovim G, Johnsen HJ, Zwart JA (1995)
[Elevated intracranial pressure following brain infarction--a retrospective study]
Tidsskr Nor Laegeforen, 115 (2), 203-6
PubMed 7855810

Bovim G, Johnsen HJ, Zwart JA, Unsgård G (1995)
[Elevated intracranial pressure following brain infarction--therapeutical possibilities]
Tidsskr Nor Laegeforen, 115 (2), 207-9
PubMed 7855811

Sjaastad O, Stolt-Nielsen A, Blume H, Zwart JA, Fredriksen TA (1995)
Cervicogenic headache. Long-term results of radiofrequency treatment of the planum nuchale
Funct Neurol, 10 (6), 265-71
PubMed 8837990

Zwart JA, Sand T (1995)
Exteroceptive suppression of temporalis muscle activity: a blind study of tension-type headache, migraine, and cervicogenic headache
Headache, 35 (6), 338-43
DOI 10.1111/j.1526-4610.1995.hed3506338.x, PubMed 7635719

Publications 1994

Sand T, Zwart JA (1994)
The blink reflex in chronic tension-type headache, migraine, and cervicogenic headache
Cephalalgia, 14 (6), 447-50; discussion 394-5
DOI 10.1046/j.1468-2982.1994.1406447.x, PubMed 7697706

Zwart JA, Bovim G, Sand T, Sjaastad O (1994)
Tension headache: botulinum toxin paralysis of temporal muscles
Headache, 34 (8), 458-62
DOI 10.1111/j.1526-4610.1994.hed3408458.x, PubMed 7960729

Zwart JA, Helseth E, Skaanes KO (1994)
[Percutaneous lumbar diskectomy]
Tidsskr Nor Laegeforen, 114 (24), 2845-7
PubMed 7998032

Publications 1993

Zwart JA, Bovim G, Johnsen HJ, Schrader H (1993)
[Mononucleosis and neurological manifestations]
Tidsskr Nor Laegeforen, 113 (12), 1461-2
PubMed 7741803

Publications 1987

Ellingsen I, Sydnes G, Hauge A, Zwart JA, Liestøl K, Nicolaysen G (1987)
CO2 sensitivity in humans breathing 1 or 2% CO2 in air
Acta Physiol Scand, 129 (2), 195-202
DOI 10.1111/j.1748-1716.1987.tb08059.x, PubMed 3107346