Blar i Bergen Open Research Archive på forfatter "Hagen, Knut"
-
Answer to comment on "sleep quality, arousal and pain thresholds in migraineurs: a blinded controlled polysomnographic study"
Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Sand, Trond (Journal article, 2013-07-01)We discuss the comments on our article “Sleep quality, arousal and pain thresholds in migraineurs. A blinded controlled polysomnographic study” published in JHP 2013 Feb 14;14(1):12. We hypothesize that migraineurs need ... -
Association between body height and chronic low back pain: a follow-up in the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2015-06-15)Objective: To study potential associations between body height and subsequent occurrence of chronic low back pain (LBP). Design: Prospective cohort study. Setting: The North-Trøndelag Health Study (HUNT). Data were ... -
Associations between the number of children, age at childbirths and prevalence of chronic low back pain: the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John-Anker (Journal article; Peer reviewed, 2020)Background Associations between childbirths and subsequent risk of low back pain (LBP) have not been clarified. Changes in sex hormone levels or lumbar posture during pregnancy may have an impact on LBP later in life. The ... -
COL11A1 is associated with developmental dysplasia of the hip and secondary osteoarthritis in the HUNT study
Jacobsen, Kaya Kvarme; Børte, Sigrid; Laborie, Lene Bjerke; Kristiansen, Hege; Schäfer, Annette; Gundersen, Trude; Zayats, Tetyana; Winsvold, Bendik Kristoffer Slagsvold; Karen, Rosendahl; Martinsen, Amy; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen J; Fors, Egil Andreas; Kristoffersen, Espen Saxhaug; Heuch, Ingrid; Mundal, Ingunn Pernille; Zwart, John Anker Henrik; Nielsen, Jonas B.; Storheim, Kjersti; Hagen, Knut; Nilsen, Kristian Bernhard; Hveem, Kristian; Fritsche, Lars G; Thomas, Laurent Francois; Pedersen, Linda Margareth; Gabrielsen, Maiken Elvestad; Lie, Marie U.; Stensland, Synne; Zhou, Wei (Journal article; Peer reviewed, 2024)Objective: Developmental dysplasia of the hip (DDH) is a congenital condition affecting 2-3% of all infants. DDH increases the risk of osteoarthritis, is the cause of 30% of all total hip arthroplasties (THAs) in adults ... -
A Comparison of Anthropometric Measures for Assessing the Association between Body Size and Risk of Chronic Low Back Pain: TheHUNT Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2015-10-27)Background: Previous work indicates that overweight and obese individuals carry an increased risk of experiencing chronic low back pain (LBP). It is not known, however, how the association with body size depends on the ... -
Dissecting the shared genetic basis of migraine and mental disorders using novel statistical tools
Bahrami, Shahram; Hindley, Guy Frederick Lanyon; Winsvold, Bendik K S; O'Connell, Kevin S; Frei, Oleksandr; Shadrin, Alexey; Cheng, Weiqiu; Bettella, Francesco; Rødevand, Linn; Ødegaard, Ketil Joachim; Fan, Chun C; Pirinen, Matti J; Hautakangas, Heidi M; Martinsen, Amy; Skogholt, Anne Heidi; Brumpton, Ben Michael; Willer, Cristen J; Tronvik, Erling Andreas; Kristoffersen, Espen Saxhaug; Zwart, John Anker Henrik; Nielsen, Jonas Bille; Hagen, Knut; Nilsen, Kristian Bernhard; Hveem, Kristian; Stovner, Lars Jacob; Fritsche, Lars; Thomas, Laurent; Pedersen, Linda Margareth; Gabrielsen, Maiken Elvestad; Johnsen, Marianne Bakke; Lie, Marie; Holmen, Oddgeir Lingaas; Børte, Sigrid; Stensland, Synne; Zhou, Wei; Dale, Anders; Djurovic, Srdjan; Smeland, Olav Bjerkehagen; Andreassen, Ole (Journal article; Peer reviewed, 2022)Migraine is three times more prevalent in people with bipolar disorder or depression. The relationship between schizophrenia and migraine is less certain although glutamatergic and serotonergic neurotransmission are ... -
Do abnormal serum lipid levels increase the risk of chronic low back pain? The Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2014-09-18)Background: Cross-sectional studies suggest associations between abnormal lipid levels and prevalence of low back pain (LBP), but it is not known if there is any causal relationship. Objective: The objective was to determine, ... -
Does diabetes influence the probability of experiencing chronic low back pain? A population-based cohort study: the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker (Peer reviewed; Journal article, 2019)Objective: Low back pain (LBP) is a major problem in modern society and it is important to study possible risk factors for this disorder. People with diabetes are often affected by LBP, but whether diabetes represents a ... -
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
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik (Journal article; Peer reviewed, 2022)Objective In most population-based studies of low back pain (LBP), women have a higher risk than men, possibly reflecting hormonal influences. The aim of this study was to explore associations between age at menarche and ... -
Is chronic low back pain a risk factor for diabetes? The Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Sørgjerd, Elin Pettersen; Åsvold, Bjørn Olav; Zwart, John-Anker (Peer reviewed; Journal article, 2018)Objective: The purpose of this study was to examine the risk of diabetes associated with the presence or absence of chronic low back pain, considering both cross-sectional and cohort data. Research design and methods: ... -
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
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2016-04-11)Background: Physical activity in leisure time is often considered to have favourable effects on the risk of low back pain (LBP), but demonstrating a definite association in epidemiological studies has proven difficult. The ... -
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
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Mai, Xiao-Mei; Langhammer, Arnulf; Zwart, John-Anker (Peer reviewed; Journal article, 2017-11-25)Objectives: To explore potential associations between vitamin D status and risk of chronic low back pain (LBP) in a Norwegian cohort, and to investigate whether relationships depend on the season of blood sample collection. ... -
Menopausal hormone therapy, oral contraceptives and risk of chronic low back pain: the HUNT Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Storheim, Kjersti; Zwart, John Anker Henrik (Journal article; Peer reviewed, 2023)Background There are indications that use of menopausal hormone therapy (MHT) and oral contraceptives (OC) increases the risk of low back pain (LBP), with higher oestrogen levels involved in the underlying mechanisms. The ... -
Physical activity level at work and risk of chronic low back pain: A follow-up in the Nord-Trøndelag Health Study
Heuch, Ingrid; Heuch, Ivar; Hagen, Knut; Zwart, John-Anker (Peer reviewed; Journal article, 2017-04-10)Background: Physical activity in leisure time seems to reduce the risk of low back pain, but it is not known whether occupational activity, as recorded in a representative working population, produces a higher or lower ... -
Sleep quality, arousal and pain thresholds in migraineurs: a blinded controlled polysomnographic study
Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Stovner, Lars Jacob; Gravdahl, Gøril Bruvik; Stjern, Marit; Sand, Trond (Peer reviewed; Journal article, 2013-02-14)Background: Our aim was to compare subjective and objective sleep quality and arousal in migraine and to evaluate the relationship between sleep quality and pain thresholds (PT) in controls, interictal, preictal and postictal ... -
Sleep-related and non-sleep-related migraine: interictal sleep quality, arousals and pain thresholds
Engstrøm, Morten; Hagen, Knut; Bjørk, Marte Helene; Gravdahl, Gøril Bruvik; Sand, Trond (Peer reviewed; Journal article, 2013-08-06)Background: The mechanisms associating sleep and migraine are unknown. No previous polysomnographic (PSG) or pain-threshold (PT) study has compared patients with sleep-related migraine attacks (SM), non-sleep related ...