Browsing NTNU Open by Author "Bjorvatn, Bjørn"
Now showing items 1-20 of 22
-
A pilot study of impulse radio ultra wideband radar technology as a new tool for sleep assessment
Pallesen, Ståle; Grønli, Janne; Myhre, Kenneth; Moen, Frode; Bjorvatn, Bjørn; Hanssen, Ingar; Heglum, Hanne Siri Amdahl (Journal article; Peer reviewed, 2018)Study Objectives: To validate Impulse radio ultra wideband pulse-doppler radar technology against polysomnography (PSG) for sleep assessment. Methods: In all, 12 participants were recruited and their overnight sleep was ... -
Association Between Cardiorespiratory Fitness and Incident Purchase of Hypnotic Drugs in Adults: The HUNT Study
Ernstsen, Linda; Zotcheva, Ekaterina; Sui, Xuemei; Engstrøm, Morten; Martinez-Velilla, Nicolás; Bjerkeset, Ottar; Bjorvatn, Bjørn; Havnen, Audun (Peer reviewed; Journal article, 2022)Objective To assess whether cardiorespiratory fitness (CRF) is associated with first purchase of a prescribed hypnotic drug in the adult population. Methods A total of 34,357 adult participants (53.9% women) with a ... -
The association between shift work and immunological biomarkers in nurses
Bjorvatn, Bjørn; Axelsson, John; Pallesen, Ståle; Waage, Siri; Vedaa, Øystein; Blytt, Kjersti Marie; Buchvold, Hogne Vikanes; Moen, Bente Elisabeth; Thun, Eirunn (Journal article; Peer reviewed, 2020)Objectives: Shift work is associated with several negative health effects. The underlying pathophysiological mechanisms are unclear, but low-grade inflammation has been suggested to play a role. This project aimed to ... -
The association of sleepiness, insomnia, sleep disturbance and pain: a study amongst shiftworking nurses
Katsifaraki, Maria; Nilsen, Kristian Bernhard; Wærsted, Morten; Knardahl, Stein; Lie, Jenny-Anne Sigstad; Bjorvatn, Bjørn; Härmä, Mikko; Matre, Dagfinn (Peer reviewed; Journal article, 2017)Sleep problems are commonly associated with chronic pain. It is not known whether pain is more related to a particular type of sleep problem or to more composite measures of sleep disturbance. The aim of the study was to ... -
Changes in work schedule affect the prevalence of shift work disorder among Norwegian nurses–a two year follow-up study
Waage, Siri; Pallesen, Ståle; Moen, Bente Elisabeth; Vedaa, Øystein; Thun, Eirunn; Buchvold, Hogne Vikanes; Blytt, Kjersti Marie; Harris, Anette Kristoffersen; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2021)This study aimed to explore how changes in the work schedule would affect the prevalence of Shift Work Disorder (SWD) over time. Two-year follow-up data from 1076 nurses participating in the longitudinal SUrvey of Shift ... -
Circadian typology and implications for adolescent sleep health. Results from a large, cross-sectional, school-based study
Saxvig, Ingvild West; Evanger, Linn Nyjordet; Pallesen, Ståle; Hysing, Mari; Sivertsen, Børge; Gradisar, Michael; Bjorvatn, Bjørn (Peer reviewed; Journal article, 2021)Study objectives To investigate circadian typology in a large, representative sample of Norwegian adolescents, and its implications for sleep health. Methods The sample included 3920 1st year high school students aged ... -
Cognitive performance in DSWPD patients upon awakening from habitual sleep compared with forced conventional sleep
Solheim, Brandy; Olsen, Alexander; Kallestad, Håvard; Langsrud, Knut; Bjorvatn, Bjørn; Gradisar, Michael; Sand, Trond (Journal article; Peer reviewed, 2018)Difficult early morning awakening is one of the defining symptoms of delayed sleep–wake phase disorder. It is accompanied by low cognitive arousal and drowsiness resulting in difficulty concentrating and focusing attention ... -
Habitual Sleep, Social Jetlag, and Reaction Time in Youths With Delayed Sleep–Wake Phase Disorder. A Case–Control Study
Saxvig, Ingvild W.; Wilhelmsen-Langeland, Ane; Pallesen, Ståle; Nordhus, Inger Hilde; Vedaa, Øystein; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2019)The aim of this study was to explore habitual sleep, social jetlag, and day-to-day variations in sleep (measured as intra-individual standard deviation, ISD) in youths with delayed sleep–wake phase disorder (DSWPD), compared ... -
Health-promoting work schedules. Protocol for a large-scale cluster randomised controlled trial on the effects of a work schedule without quick returns on sickness absence among healthcare workers
Vedaa, Øystein; Djupedal, Ingebjørg Louise Rockwell; Svensen, Erling; Waage, Siri; Bjorvatn, Bjørn; Pallesen, Ståle; Lie, Stein Atle; Nielsen, Morten Birkeland; Harris, Anette Kristoffersen (Journal article; Peer reviewed, 2022)ntroduction In shift work, quick returns refer to transitions between two shifts with less than 11 hours available rest time. Twenty-three per cent of employees in European countries reported having quick returns. Quick ... -
Insomnia as a partial mediator of the relationship between personality and future symptoms of anxiety and depression among nurses
Sørengaard, Torhild Anita; Karlsen, Håvard Rudi; Langvik, Eva; Pallesen, Ståle; Bjorvatn, Bjørn; Waage, Siri; Moen, Bente Elisabeth; Saksvik-Lehouillier, Ingvild (Journal article; Peer reviewed, 2019)Background: This study investigates insomnia as a partial mediator in the relationship between personality and symptoms of anxiety and depression. Methods: The study is based on partly longitudinal data from the ongoing ... -
Long working hours are inversely related to sick leave in the following 3 months: a 4-year registry study
Vedaa, Øystein; Pallesen, Ståle; Erevik, Eilin K.; Svensen, Erling; Waage, Siri; Bjorvatn, Bjørn; Sivertsen, Børge; Harris, Anette (Journal article; Peer reviewed, 2018)The aim of this study was to investigate the effects of long working hours (≥ 12 h shifts) on sick leave using objective records of shift work exposure and of sick leave. A total of 1538 nurses (mean age 42.5, SD 12.0; ... -
Nasjonal anbefaling for utredning og behandling av døgnrytmelidelser
Bjorvatn, Bjørn; Kallestad, Håvard; Langsrud, Knut; Vedaa, Øystein; Pallesen, Ståle; Waage, Siri; Wilhelmsen-Langeland, Ane; Saxvig, Ingvild; Abeler, Karin Louise (Peer reviewed; Journal article, 2023)Nasjonal kompetansetjeneste for søvnsykdommer (fra 2023: Nasjonalt senter for søvnmedisin) nedsatte høsten 2022 en arbeidsgruppe for å utvikle en nasjonal anbefaling for utredning og behandling av døgnrytmelidelser. Gruppen ... -
The Norwegian PraksisNett: a nationwide practice-based research network with a novel IT infrastructure
Kristoffersen, Espen Saxhaug; Bjorvatn, Bjørn; Halvorsen, Peder Andreas; Nilsen, Stein; Fossum, Guro Haugen; Fors, Egil Andreas; Jørgensen, Pål; Øxnevad-Gundersen, Berit; Gjelstad, Svein; Bellika, Johan Gustav; Straand, Jørund; Rørtveit, Guri (Peer reviewed; Journal article, 2022)Clinical research in primary care is relatively scarce. Practice-based research networks (PBRNs) are research infrastructures to overcome hurdles associated with conducting studies in primary care. In Norway, almost all ... -
Patients with delayed sleep-wake phase disorder show poorer executive functions compared to good sleepers
Wilhelmsen-Langeland, Ane; Saxvig, Ingvild W.; Johnsen, Emma Hole; Marszalek, Maja Anna; Andersen, Maria Isolde Wiig; Sætre, Vild Katrine; Lundervold, Astri; Vedaa, Øystein; Nordhus, Inger Hilde; Pallesen, Ståle; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2019)Objective Delayed Sleep-Wake Phase Disorder (DSWPD) is associated with negative outcomes, including reduced daytime performance and difficulties with treatment adherence. These outcomes are mediated by executive functions ... -
Short rest between shifts (quick returns) and night work is associated with work-related accidents
Vedaa, Øystein; Harris, Anette; Erevik, Eilin K.; Waage, Siri; Bjorvatn, Bjørn; Sivertsen, Børge; Moen, Bente Elisabeth; Pallesen, Ståle (Journal article; Peer reviewed, 2019)Purpose The aim of this study was to examine whether less than 11 h between shifts (i.e., quick returns, QRs) and night shifts is associated with self-reported work-related accidents, near accidents or dozing off at work ... -
Sleep duration mediates abdominal and lower-extremity pain after night work in nurses
Katsifaraki, Maria; Nilsen, Kristian Bernhard; Christensen, Jan Olav; Wærsted, Morten; Knardahl, Stein; Bjorvatn, Bjørn; Härmä, Mikko; Matre, Dagfinn (Peer reviewed; Journal article, 2018)Objectives: The aim of this study was to investigate the association between different working shifts (i.e. morning, evening, night shifts) and headache, musculoskeletal and abdominal pain, and the extent to which reduced ... -
Sleep during COVID-19-related school lockdown, a longitudinal study among high school students
Saxvig, Ingvild West; Pallesen, Ståle; Sivertsen, Børge; Hysing, Mari; Evanger, Linn Nyjordet; Bjorvatn, Bjørn (Peer reviewed; Journal article, 2021)There has been great concern about the impact of coronavirus disease 2019 (COVID-19)-related school lockdown on adolescent health. The aim of the present study was to compare sleep patterns before and during COVID-19-related ... -
Sleep in older adolescents. Results from a large cross-sectional, population-based study
Saxvig, Ingvild W.; Bjorvatn, Bjørn; Hysing, Mari; Sivertsen, Børge; Gradisar, Michael; Pallesen, Ståle (Peer reviewed; Journal article, 2020)The aim of the present study was to describe sleep patterns in a large and representative sample of Norwegian adolescents. The sample included 4,010 first‐year high school students, aged 16–17 years (54% female), who ... -
Sleep patterns among Norwegian nurses between the first and second wave of the COVID-19 pandemic
Waage, Siri; Pallesen, Ståle; Vedaa, Øystein; Buchvold, Hogne Vikanes; Blytt, Kjersti Marie; Harris, Anette; Bjorvatn, Bjørn (Peer reviewed; Journal article, 2021)Background Nurses are in the frontline and play an important role in the battle against the COrona VIrus Disease-2019 (COVID-19) pandemic. Sleep problems among health care workers are likely to increase due to the ... -
Sleep structure and awakening threshold in delayed sleep-wake phase disorder patients compared to healthy sleepers
Solheim, Brandy; Langsrud, Knut; Kallestad, Håvard; Engstrøm, Morten; Bjorvatn, Bjørn; Sand, Trond (Journal article; Peer reviewed, 2018)Study Objectives Difficult early morning awakening is a primary symptom of delayed sleep-wake phase disorder (DSWPD), however, it remains poorly investigated. Our main objective was to quantify the awakening threshold in ...