Blar i St. Olavs hospital på forfatter "Hagen, Knut"
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Reliability of a self-administrated musculoskeletal questionnaire: The fourth Trøndelag health study
Dahl, Astri Grøtan; Havang, Sara; Hagen, Knut (Peer reviewed; Journal article, 2021)Background: The reliability of the Nordic Musculoskeletal Questionnaire (NMQ) has not been evaluated in an unselected general population. The aim of this population-based follow-up study was to estimate the reliability ... -
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 (Journal article; Peer reviewed, 2013)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 (Journal article; Peer reviewed, 2013)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 ... -
The crossover design for migraine preventives: an analyses of four randomized placebo-controlled trials
Astrid Bjørke, Jenssen; Stovner, Lars Jacob; Tronvik, Erling Andreas; Sand, Trond; Helde, Grethe; Gravdahl, Gøril Bruvik; Hagen, Knut (Journal article; Peer reviewed, 2019)Aims To evaluate the crossover design in migraine preventive treatment trials by assessing dropout rate, and potential period and carryover effect in four placebo-controlled randomized controlled trials (RCTs). Methods In ... -
The HUNT4 study: the validity of questionnaire-based diagnoses
Hagen, Knut; Åsberg, Anders Nikolai; Uhlig, Benjamin Langsæter; Tronvik, Erling Andreas; Brenner, Eiliv; Sand, Trond (Journal article; Peer reviewed, 2019)Background Questionnaire-based headache diagnoses should be validated against diagnoses made by the gold standard, which is personal interview by a headache expert. The diagnostic algorithm with the best diagnostic accuracy ... -
The impact of C-reactive protein levels on headache frequency in the HUNT study 2006-2008
Hagen, Knut; Stovner, Lars Jacob; Nilsen, Kristian Bernhard; Kristoffersen, Espen Saxhaug; Winsvold, Bendik K S (Journal article; Peer reviewed, 2019)Background Increased high sensitivity C- reactive protein (hs-CRP) levels have been found in many earlier studies on migraine, and recently also in persons with migraine and insomnia. The aim of this study was to see ... -
The impact of headache and chronic musculoskeletal complaints on the risk of insomnia: longitudinal data from the Nord-Trondelag health study
Ødegård, Siv Steinsmo; Sand, Trond; Engstrøm, Morten; Zwart, John-Anker; Hagen, Knut (Journal article; Peer reviewed, 2013)Background A strong relationship between insomnia and painful disorders has been found, but it is still unclear whether chronic pain leads to insomnia. There is a need of large-scale prospective studies to evaluate if ... -
The relationship between headache and religious attendance (the Nord-Trøndelag health study-HUNT)
Tronvik, Erling; Sørensen, Torgeir; Linde, Mattias; Bendtsen, Lars; Artto, Ville; Laurell, Katarina; Kallela, Mikko; Zwart, John-Anker; Hagen, Knut (Journal article; Peer reviewed, 2014)Background Religious belief can be used as a pain coping strategy. Our purpose was to evaluate the relationship between headache and religious activity using prospective data from a large population-based study. Meth ... -
The relationship of anxiety, depression and behavioral problems with recurrent headache in late adolescence - a Young-HUNT follow-up study
Blaauw, Brit Andenes; Dyb, Grete; Hagen, Knut; Holmen, Turid Lingaas; Linde, Mattias; Wentzel-Larsen, Tore; Zwart, John-Anker (Journal article; Peer reviewed, 2015)Background The comorbidity of headache and psychiatric symptoms is a well-recognized clinical phenomenon, but there are only limited data regarding the temporal relationship between headache and symptoms of anxiety and ... -
Validation of questionnaires for restless legs syndrome in the general population: the Trøndelag Health Study (HUNT)
Filosa, James; Omland, Petter Moe; Hagen, Knut; Langsrud, Knut; Brenner, Eiliv; Knutsen, Andreas; Drange, Ole Kristian; Gravdahl, Gøril Bruvik; Stjern, Marit; Engstrøm, Morten; Sand, Trond (Peer reviewed; Journal article, 2022)Questionnaires for restless legs syndrome have rarely been validated against face-to-face interviews in the general population. We aimed to validate the modified Norwegian, seven-item Cambridge-Hopkins restless legs syndrome ... -
White matter hyperintensities and headache: A population-based imaging study (HUNT MRI)
Honningsvåg, Lasse-Marius; Håberg, Asta; Hagen, Knut; Kvistad, Kjell Arne; Stovner, Lars Jacob; Linde, Mattias (Journal article; Peer reviewed, 2018)Objective To examine the relationship between white matter hyperintensities and headache. Methods White matter hyperintensities burden was assessed semi-quantitatively using Fazekas and Scheltens scales, and by manual ... -
Work-Related Mental Fatigue, Physical Activity and Risk of Insomnia Symptoms: Longitudinal Data from the Norwegian HUNT Study
Skarpsno, Eivind S.; Nilsen, Tom Ivar Lund; Sand, Trond; Hagen, Knut; Mork, Paul Jarle (Journal article; Peer reviewed, 2019)Objective/Background: To examine the prospective association between work-related mental fatigue and risk of insomnia symptoms, and if leisure time physical activity modifies this association. Participants: A total of ...