Browsing University of Bergen Library by Author "Waage, Siri"
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Acute effects of a simulated quick return on subjective sleepiness, mood, and cognitive performance: A laboratory crossover controlled trial
Holmelid, Øystein; Harris, Anette; Pallesen, Ståle; Bjorvatn, Bjørn; Vedaa, Øystein; Waage, Siri; Nielsen, Morten Birkeland; Djupedal, Ingebjørg Louise Rockwell; Sunde, Erlend (Journal article; Peer reviewed, 2024)Sleep loss due to short time off between shifts has been proposed as a mechanism contributing to impaired functioning in occupational settings. This laboratory crossover trial (ClinicalTrials.gov identifier: NCT05162105, ... -
Alerting and Circadian Effects of Short-Wavelength vs. Long-Wavelength Narrow-Bandwidth Light during a Simulated Night Shift
Sunde, Erlend; Pedersen, Torhild; Mrdalj, Jelena; Thun, Eirunn; Grønli, Janne; Harris, Anette; Bjorvatn, Bjørn; Waage, Siri; Skene, Debra J.; Pallesen, Ståle (Journal article; Peer reviewed, 2020)Light can be used to facilitate alertness, task performance and circadian adaptation during night work. Novel strategies for illumination of workplaces, using ceiling mounted LED-luminaires, allow the use of a range of ... -
The association between different sleep health dimensions and sex, age, education, circadian preference, and chronic insomnia: a representative population-based study
Bjorvatn, Bjørn; Waage, Siri; Pallesen, Ståle; Buysse, Daniel J.; Saxvig, Ingvild W. (Journal article; Peer reviewed, 2023)Objectives The aims were to explore multidimensional sleep health and the different dimensions of sleep health in the adult Norwegian population in relation to sex, age, education, circadian preference, and chronic ... -
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 between shift work disorder and turnover intention among nurses
Blytt, Kjersti Marie; Bjorvatn, Bjørn; Moen, Bente Elisabeth; Pallesen, Ståle; Harris, Anette Kristoffersen; Waage, Siri (Journal article; Peer reviewed, 2022)Background: Shift work disorder (SWD) is highly prevalent among shift-working nurses and has multiple negative health-related effects. There is a dearth of insight into career-related decisions made by nurses suffering ... -
The associations between different types of infections and circadian preference and shift work
Bjorvatn, Bjørn; Waage, Siri; Emberland, Knut Erik; Litleskare, Sverre; Rebnord, Ingrid Keilegavlen; Forthun, Ingeborg; Rørtveit, Guri (Journal article; Peer reviewed, 2024)Disturbed sleep and circadian disruption are reported to increase the risk of infections. People with an evening circadian preference and night workers typically report insufficient sleep, and the aims of the present study ... -
Associations between excessive fatigue and pain, sleep, mental-health and work factors in Norwegian nurses
Hiestand, Stand Fenimore; Forthun, Ingeborg; Waage, Siri; Pallesen, Ståle; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2023)Aim To investigate whether pain, sleep duration, insomnia, sleepiness, work-related factors, anxiety, and depression associate with excessive fatigue in nurses. Background Fatigue among nurses is a problem in the ... -
Blue-enriched white light improves performance but not subjective alertness and circadian adaptation during three consecutive simulated night shifts
Sunde, Erlend; Pedersen, Torhild; Mrdalj, Jelena; Thun, Eirunn; Grønli, Janne; Harris, Anette; Bjorvatn, Bjørn; Waage, Siri; Skene, Debra J.; Pallesen, Ståle (Journal article; Peer reviewed, 2020)Use of blue-enriched light has received increasing interest regarding its activating and performance sustaining effects. However, studies assessing effects of such light during night work are few, and novel strategies for ... -
Bright light exposure during simulated night work improves cognitive flexibility
Sunde, Erlend; Mrdalj, Jelena; Pedersen, Torhild Thue; Bjorvatn, Bjørn; Grønli, Janne; Harris, Anette Kristoffersen; Waage, Siri; Pallesen, Ståle (Journal article; Peer reviewed, 2022)Night work leads to sleepiness and reduced vigilant attention during work hours, and bright light interventions may reduce such effects. It is also known that total sleep deprivation impairs cognitive flexibility as measured ... -
Changes in the Work Schedule of Nurses Related to the COVID-19 Pandemic and Its Relationship with Sleep and Turnover Intention
Djupedal, Ingebjørg Louise Rockwell; Pallesen, Ståle; Harris, Anette Kristoffersen; Waage, Siri; Bjorvatn, Bjørn; Vedaa, Øystein (Journal article; Peer reviewed, 2022-07-17)Background: This study aimed to investigate whether different types of changes in the work schedule of nurses working rotating shifts during the COVID-19 pandemic were associated with sleep duration, sleep quality, and ... -
Do people use methods or tricks to fall asleep? A comparison between people with and without chronic insomnia
Bjorvatn, Bjørn; Waage, Siri; Saxvig, Ingvild W. (Journal article; Peer reviewed, 2022)The present study estimated the frequency of using methods or tricks to fall asleep in the general Norwegian population. Further, people with chronic insomnia were compared with people without chronic insomnia. A representative ... -
Effects of a work schedule with abated quick returns on insomnia, sleepiness and work-related fatigue. Results from a large-scale cluster randomized controlled trial
Djupedal, Ingebjørg Louise Rockwell; Harris, Anette; Svensen, Erling; Pallesen, Ståle; Waage, Siri; Nielsen, Morten Birkeland; Sunde, Erlend; Bjorvatn, Bjørn; Holmelid, Øystein; Vedaa, Øystein (Journal article; Peer reviewed, 2024)Study objectives To investigate the effect of a work schedule with abated quick returns (i.e., >11 hours between two shifts) on insomnia, daytime sleepiness, and work-related fatigue compared to a shift schedule maintaining ... -
The effects of bright light treatment on subjective and objective sleepiness during three consecutive night shifts among hospital nurses – a counter-balanced placebo-controlled crossover study
Bjorvatn, Bjørn; Pallesen, Ståle; Waage, Siri; Thun, Eirunn; Blytt, Kjersti Marie (Journal article; Peer reviewed, 2021)Objectives The objective was to investigate effects of timed bright light treatment on subjective and objective measures of sleepiness during three consecutive night shifts among hospital nurses. Methods Thirty-five ... -
Factors leading to excessive fatigue in nurses – a three-year follow-up study
Hiestand, Stand Fenimore; Waage, Siri; Forthun, Ingeborg; Pallesen, Ståle; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2024)Global nursing shortages necessitate the identification of mitigatable factors that may reduce nursing absence and turnover. Fatigue has been shown to be associated with these issues. This study aimed to identify factors ... -
Habitual Sleep Patterns and Chronic Sleep Problems in Relation to Sex, Age, and Circadian Preference in a Population-Based Sample of Norwegian Adults
Saxwig, Ingvild West; Bjorvatn, Bjørn; Waage, Siri (Journal article; Peer reviewed, 2023)Sleep patterns and problems vary in relation to internal (e.g., sex, age, circadian preference) and external (e.g., social structures) factors. The main aim of the present study was to describe habitual sleep patterns and ... -
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)Introduction 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 ... -
The long-term effect of work schedule, shift work disorder, insomnia and restless legs syndrome on headache among nurses: A prospective longitudinal cohort study
Kristoffersen, Espen Saxhaug; Pallesen, Ståle; Waage, Siri; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2024)Background The preset study aimed to explore whether work schedules and sleep disorders predict the onset of headache. Methods A longitudinal study was conducted with questionnaire data from 2014 (baseline) and 2017 ... -
A longitudinal study on the association between quick returns and occupational accidents
Vedaa, Øystein; Harris, Anette; Waage, Siri; Bjorvatn, Bjørn; Thun, Eirunn; Buchvold, Hogne Vikanes; Djupedal, Ingebjørg Louise Rockwell; Pallesen, Ståle (Journal article, 2020)Objective: This study aimed to investigate how change in the number of quick returns [(QR) <11 hours between consecutive shifts] longitudinally is associated with risk of occupational accidents among nurses. Methods: ... -
Prevalence of shift work disorder: A systematic review and meta-analysis
Pallesen, Ståle; Bjorvatn, Bjørn; Waage, Siri; Harris, Anette Kristoffersen; Sagoe, Dominic (Journal article; Peer reviewed, 2021)Objectives: No systematic review or meta-analysis concerning the prevalence of shift work disorder (SWD) has been conducted so far. The aim was thus to review prevalence studies of SWD, to calculate an overall prevalence ... -
Protocol for a systematic review and meta-analysis on the associations between shift work and sickness absence
Sunde, Erlend; Harris, Anette Kristoffersen; Nielsen, Morten Birkeland; Bjorvatn, Bjørn; Lie, Stein Atle; Holmelid, Øystein; Vedaa, Øystein; Waage, Siri; Pallesen, Ståle (Journal article; Peer reviewed, 2022)Background Shift work, i.e., non-standard work hours, has been associated with both short- and long-term sickness absence. However, findings are inconsistent and inconclusive. Thus far, no comprehensive meta-analytic ...