Torbjorn Akerstedt

Summary

Affiliation: Karolinska Institutet
Country: Sweden

Publications

  1. pmc Work organisation and unintentional sleep: results from the WOLF study
    Torbjorn Akerstedt
    National Institute for Psychsocial Factors and Health, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Occup Environ Med 59:595-600. 2002
  2. ncbi Predicting long-term sickness absence from sleep and fatigue
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine, Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
    J Sleep Res 16:341-5. 2007
  3. ncbi Good sleep--its timing and physiological sleep characteristics
    T Akerstedt
    IPM and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    J Sleep Res 6:221-9. 1997
  4. ncbi Psychosocial stress and impaired sleep
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine and Karolinska Institutet, PO Box 230, 171 77 Stockholm, Sweden
    Scand J Work Environ Health 32:493-501. 2006
  5. ncbi Impaired alertness and performance driving home from the night shift: a driving simulator study
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine, Karolinska Insitutet, Stockholm, Sweden
    J Sleep Res 14:17-20. 2005
  6. ncbi Impaired sleep after bedtime stress and worries
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine and Karolinska Institutet, Stockholm, Sweden
    Biol Psychol 76:170-3. 2007
  7. ncbi Bright light as a sleepiness prophylactic: a laboratory study of subjective ratings and EEG
    Torbjorn Akerstedt
    IPM and Karolinska Institute, Solna, Sweden
    Percept Mot Skills 97:811-9. 2003
  8. ncbi Shift work and mortality
    Torbjorn Akerstedt
    National Institute for Psychosocial Factors and Health and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Chronobiol Int 21:1055-61. 2004
  9. ncbi Sleep and sleepiness in relation to stress and displaced work hours
    Torbjorn Akerstedt
    Karolinska Institutet, Institute for Psychosocial Medicine Box 230, S 171 77 Stockholm, Sweden
    Physiol Behav 92:250-5. 2007
  10. ncbi Predictions from the three-process model of alertness
    Torbjorn Akerstedt
    IPM, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 75:A75-83. 2004

Detail Information

Publications79

  1. pmc Work organisation and unintentional sleep: results from the WOLF study
    Torbjorn Akerstedt
    National Institute for Psychsocial Factors and Health, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Occup Environ Med 59:595-600. 2002
    ..Falling asleep at work is receiving increasing attention as a cause of work accidents...
  2. ncbi Predicting long-term sickness absence from sleep and fatigue
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine, Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
    J Sleep Res 16:341-5. 2007
    ..The results indicate that disturbed sleep and fatigue are predictors of long-term absence and it is suggested that impaired sleep may be part of a chain of causation, considering its effects on fatigue...
  3. ncbi Good sleep--its timing and physiological sleep characteristics
    T Akerstedt
    IPM and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    J Sleep Res 6:221-9. 1997
    ..The results indicate that the duration of wakefulness prior to sleep and the timing of sleep determine its physiological expression, which in turn determines its subjective impression...
  4. ncbi Psychosocial stress and impaired sleep
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine and Karolinska Institutet, PO Box 230, 171 77 Stockholm, Sweden
    Scand J Work Environ Health 32:493-501. 2006
    ..Much knowledge is still lacking, however, particularly about the effects of real-life work stress. The latter requires longitudinal studies in real-life situations...
  5. ncbi Impaired alertness and performance driving home from the night shift: a driving simulator study
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine, Karolinska Insitutet, Stockholm, Sweden
    J Sleep Res 14:17-20. 2005
    ..102 to 0.143 s), and increased subjective sleepiness. The results indicate severe postnight shift effects on sleepiness and driving performance...
  6. ncbi Impaired sleep after bedtime stress and worries
    Torbjorn Akerstedt
    Institute for Psychosocial Medicine and Karolinska Institutet, Stockholm, Sweden
    Biol Psychol 76:170-3. 2007
    ..It was concluded that moderate increases in stress/worries at bedtime are associated with moderately impaired sleep...
  7. ncbi Bright light as a sleepiness prophylactic: a laboratory study of subjective ratings and EEG
    Torbjorn Akerstedt
    IPM and Karolinska Institute, Solna, Sweden
    Percept Mot Skills 97:811-9. 2003
    ..The results suggest that a short (30 min.) exposure to bright light may not be a useful prophylactic against sleepiness for the period following the exposure...
  8. ncbi Shift work and mortality
    Torbjorn Akerstedt
    National Institute for Psychosocial Factors and Health and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Chronobiol Int 21:1055-61. 2004
    ..41. No other significant effects were found. It is concluded that blue-collar shift work is not related to mortality, but that risk of death is increased for women white-collar shift workers compared to women white-collar day workers...
  9. ncbi Sleep and sleepiness in relation to stress and displaced work hours
    Torbjorn Akerstedt
    Karolinska Institutet, Institute for Psychosocial Medicine Box 230, S 171 77 Stockholm, Sweden
    Physiol Behav 92:250-5. 2007
    ..The fragmentation in turn seems related to endocrine changes. Present work is focused on bringing this work together, connecting the links from stress to sleep to metabolic changes to disease and long-term sickness absence...
  10. ncbi Predictions from the three-process model of alertness
    Torbjorn Akerstedt
    IPM, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 75:A75-83. 2004
    ..The model is currently being used to evaluate work/rest schedules for navy, airline and railway applications. It is also used for teaching sleep/wake regulation and for generating research hypotheses...
  11. ncbi Mental fatigue, work and sleep
    T Akerstedt
    National Institute for Psychosocial Factors and Health, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    J Psychosom Res 57:427-33. 2004
    ..The study examined the multivariate relationship between mental fatigue and different work-related (work load, work hours) and background/life style factors, as well as disturbed sleep...
  12. ncbi Sleep as restitution: an introduction
    T Akerstedt
    Institute of Psychosocial Medicine and Karolinska Institutet, Stockholm, Sweden
    J Intern Med 254:6-12. 2003
    ..It is hypothesized that both insulin resistance and chronic low-grade inflammation may be involved...
  13. ncbi Shift work and disturbed sleep/wakefulness
    Torbjorn Akerstedt
    IPM and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Occup Med (Lond) 53:89-94. 2003
    ..These are only partially amenable to amelioration by manipulating shift patterns. However, there is no clear indication that chronic sleep problems result from long-term shift work...
  14. ncbi Is there an optimal sleep-wake pattern in shift work?
    T Akerstedt
    IPM and Karolinska Institute, Stockholm, Sweden
    Scand J Work Environ Health 24:18-27. 1998
    ..Thus computer simulations of the efficacy of alternative strategies must sometimes be used. The paper tries several such approaches and finds some possible ways of optimizing sleep. Still, the need for empirical data is emphasized...
  15. ncbi A 50-Hz electromagnetic field impairs sleep
    T Akerstedt
    National Institute for Psychosocial Factors and Health, Karolinska Institute, Stockholm, Sweden
    J Sleep Res 8:77-81. 1999
    ..Circulating melatonin, growth hormone, prolactin, testosterone or cortisol were not affected. The results suggest that commonly occurring low frequency electromagnetic fields may interfere with sleep...
  16. ncbi Night driving, season, and the risk of highway accidents
    T Akerstedt
    National institute for Psychosocial Factors and Heath and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Sleep 24:401-6. 2001
    ..It was concluded that early morning driving is several times more dangerous than driving during the forenoon. Apart from alcohol the effect seems related to sleepiness, but not to darkness...
  17. ncbi [We need our sleep!]
    Torbjorn Akerstedt
    Institutet för psykosocial medicin IPM och Karolinska institutet, Stockholm
    Lakartidningen 99:150-2. 2002
  18. ncbi A prospective study of fatal occupational accidents -- relationship to sleeping difficulties and occupational factors
    T Akerstedt
    National Institute for Psychosocial Factors and Health, Stockholm, Sweden
    J Sleep Res 11:69-71. 2002
    ..It was concluded that self-reported disturbed sleep is a predictor of accidental death at work, in addition to non-day work and male gender...
  19. ncbi Work load and work hours in relation to disturbed sleep and fatigue in a large representative sample
    Torbjorn Akerstedt
    National Institute for Psychsocial Factors and Health, Stockholm, Sweden
    J Psychosom Res 53:585-8. 2002
    ..To study the relation between work and background factors on the one hand and disturbed sleep and fatigue on the other...
  20. ncbi Sleep disturbances, work stress and work hours: a cross-sectional study
    T Akerstedt
    National Institute for Psychosocial Factors and Health Departments of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    J Psychosom Res 53:741-8. 2002
    ..The study examined the multivariate relationship between disturbed sleep and different work-related and background/life style factors...
  21. ncbi Altered sleep/wake patterns and mental performance
    Torbjorn Akerstedt
    IPM and Karolinska institutet, Bex 230, 17177 Stockholm, Sweden
    Physiol Behav 90:209-18. 2007
    ..It is suggested that there is a need for establishing the significance of impaired performance due to work hours in white collar and service work. Also the notion of individual differences in performance impairment is an important issue...
  22. ncbi [Sleep as recovery after stress]
    Torbjorn Akerstedt
    Institutet för psykosocial medicin IPM och institutionen för folkhälsovetenskap, Karolinska Institutet, Stockholm
    Lakartidningen 101:1501-5. 2004
  23. doi Sleep, sleepiness, and neurobehavioral performance while on watch in a simulated 4 hours on/8 hours off maritime watch system
    Wessel M A van Leeuwen
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Chronobiol Int 30:1108-15. 2013
    ..In addition, we showed that overtime work strongly increases sleepiness. Finally, a striking amount of participants fell asleep while on duty. ..
  24. ncbi Sleep and sleepiness in young individuals with high burnout scores
    Marie Söderström
    National Institute of Psychosocial Factors and Health, Stockholm, Sweden
    Sleep 27:1369-77. 2004
    ..The purpose was also to study the diurnal pattern of sleepiness, as well as ratings of work stress and mood in groups with different burnout scores...
  25. ncbi Driver impairment at night and its relation to physiological sleepiness
    Anna Anund
    Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Scand J Work Environ Health 34:142-50. 2008
    ....
  26. doi Predicting changes in sleep complaints from baseline values and changes in work demands, work control, and work preoccupation--the WOLF-project
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Sleep Med 13:73-80. 2012
    ..The aim of this study was to evaluate new cases of poor sleep as a function of changes in reported work demands, work control, and work preoccupation...
  27. pmc Work-related sleep disturbances and sickness absence in the Swedish working population, 1993-1999
    Hugo Westerlund
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Sleep 31:1169-77. 2008
    ..To examine secular trends in work-related sleep disturbances and their association with sickness absence in the Swedish working population...
  28. ncbi Fatigue in trans-Atlantic airline operations: diaries and actigraphy for two- vs. three-pilot crews
    Claire A Eriksen
    National Institute for Psychosocial Medicine, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 77:605-12. 2006
    ..The aim was to compare intercontinental flights with two-pilot and three-pilot crews with respect to fatigue/sleepiness and sleep, as there is considerable economic pressure on the airlines to use two-pilot crews...
  29. doi Sleep and sleepiness: impact of entering or leaving shiftwork--a prospective study
    Torbjorn Akerstedt
    Stress Research Institute, University of Stockholm and Karolinska Institutet, Stockholm, Sweden
    Chronobiol Int 27:987-96. 2010
    ..9 [CI = 1.3-6.7]). These results suggest that entering and leaving shiftwork has a considerable impact on sleep and alertness. However, there is a need for large and more extended longitudinal studies to support our findings...
  30. pmc Sleep homeostasis during repeated sleep restriction and recovery: support from EEG dynamics
    Torbjorn Akerstedt
    Stress Research Institute, University of Stockholm, Stockholm, Sweden
    Sleep 32:217-22. 2009
    ..The aim of the present study was to test the response to repeated partial sleep loss through detailed focus on spectral data and parts of sleep...
  31. ncbi Snoring and the metabolic syndrome in women
    Constanze Leineweber
    Karolinska Institute, Department of Public Health Sciences, Box 220, 171 77 Stockholm, Sweden
    Sleep Med 4:531-6. 2003
    ..The main objective was to examine the association between metabolic syndrome, snoring and sleep quality among women...
  32. ncbi Hormonal changes in satisfied and dissatisfied shift workers across a shift cycle
    John Axelsson
    National Institute for Psychosocial Factors and Health, Stockholm, Sweden
    J Appl Physiol (1985) 95:2099-105. 2003
    ..Furthermore, morning cortisol was reduced across a shift cycle. It is suggested that reduced testosterone levels may be part of a mechanism of shift work maladjustment...
  33. doi Reaction of sleepiness indicators to partial sleep deprivation, time of day and time on task in a driving simulator--the DROWSI project
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    J Sleep Res 19:298-309. 2010
    ..However, individual differences are considerable and there is need for research on how to identify and predict individual differences in susceptibility to sleepiness...
  34. ncbi Overtime work and its effects on sleep, sleepiness, cortisol and blood pressure in an experimental field study
    Anna Dahlgren
    National Institute for Psychosocial Medicine, PO Box 230, S 171 77 Stockholm, Sweden
    Scand J Work Environ Health 32:318-27. 2006
    ..In addition, stress is usually a confounder. A within-person design was used to examine the effects of working 8- or 12-hour shifts in the absence of additional stress...
  35. doi Sleep loss and accidents--work hours, life style, and sleep pathology
    Torbjorn Akerstedt
    Departement of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Prog Brain Res 190:169-88. 2011
    ..Reduced sleep is mainly due to suboptimal work schedules (or to a suboptimal life style) or to sleep pathology. We have divided the present chapter into two areas...
  36. doi Having to stop driving at night because of dangerous sleepiness--awareness, physiology and behaviour
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, Stockholm, Sweden Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
    J Sleep Res 22:380-8. 2013
    ..It was concluded that 44% of drivers during late-night driving became dangerously sleepy, and that this group showed higher perceived sleepiness and more sleep intrusions in the EEG/EOG. ..
  37. ncbi Comment on short-term variation in subjective sleepiness
    Claire A Eriksen
    Institute of Psychosocial Medicine and Karolinska Institutet, Stockholm, Sweden
    Percept Mot Skills 101:943-8. 2005
    ..It was concluded that there are large variations in sleepiness related to time of day and also to context and that sparse sampling of subjective sleepiness may miss much of this variation...
  38. doi Assessment of a new dynamic light regimen in a nuclear power control room without windows on quickly rotating shiftworkers--effects on health, wakefulness, and circadian alignment: a pilot study
    Arne Lowden
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Chronobiol Int 29:641-9. 2012
    ..Nonetheless, it seems that appropriate dynamic light in rooms without windows during the dark Nordic season may promote alertness, sleep, and better adaptation to quickly rotating shiftwork...
  39. ncbi Disturbed sleep and fatigue as predictors of return from long-term sickness absence
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Ind Health 48:209-14. 2010
    ..34-0.90). Intermediate term sickness absence showed similar, but slightly weaker, results. The results indicate that disturbed sleep and fatigue are predictors of lack of return from long term and intermediate term sickness absence...
  40. ncbi The alerting effect of hitting a rumble strip--a simulator study with sleepy drivers
    Anna Anund
    Clinical Neuroscience, Karolinska Institutet, SE 177 71 Stockholm, Sweden
    Accid Anal Prev 40:1970-6. 2008
    ..It was concluded that various aspects of sleepiness are increased before hitting a rumble strip and that the effect is very short-lived. Type of strip, as used in the present study did not have any effect...
  41. doi In-car countermeasures open window and music revisited on the real road: popular but hardly effective against driver sleepiness
    Johanna F A Schwarz
    The Stress Research Institute, Stockholm University, Stockholm, Sweden
    J Sleep Res 21:595-9. 2012
    ..Thus, despite their popularity, opening the window and listening to music cannot be recommended as sole countermeasures against driver sleepiness...
  42. doi Insufficient sleep predicts clinical burnout
    Marie Söderström
    Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
    J Occup Health Psychol 17:175-83. 2012
    ..The results indicate that insufficient sleep, preoccupation with thoughts of work during leisure time, and high work demands are risk factors for subsequent burnout. The results suggest a chain of causation...
  43. doi Stress vulnerability and the effects of moderate daily stress on sleep polysomnography and subjective sleepiness
    Helena Petersen
    Stress Research Institute, University of Stockholm and Karolinska Institutet, Stockholm, Sweden
    J Sleep Res 22:50-7. 2013
    ..It was concluded that moderate daily stress is associated with a moderate negative effect on sleep sleep efficiency and fragmentation. A slightly stronger effect was seen in the sensitive group...
  44. doi 20th International Symposium on Shiftwork and Working Time: biological mechanisms, recovery, and risk management in the 24-h society
    Goran Kecklund
    Stress Research Institute, Stockholm Unversity, Stockholm, Sweden
    Chronobiol Int 29:531-6. 2012
    ..The majority of the papers are observational field studies, including some of large sample size, and three studies are well-designed laboratory experiments...
  45. ncbi Suppression of sleepiness and melatonin by bright light exposure during breaks in night work
    Arne Lowden
    IPM National Institute for Psychosocial Medicine, Karolinska Institutet, Stockholm, Sweden
    J Sleep Res 13:37-43. 2004
    ..Daytime melatonin during the readaptation after night work remained unaffected. The present findings demonstrate the feasibility and benefits of photic stimulation in industrial settings to increase adaptation to night work...
  46. doi Accounting for partial sleep deprivation and cumulative sleepiness in the Three-Process Model of alertness regulation
    Torbjorn Akerstedt
    Stress Research Institute, University of Stockholm, Stockholm, Sweden
    Chronobiol Int 25:309-19. 2008
    ..2 on the 1-21 unit scale. It was concluded that the accumulation of sleep loss effects on subjective sleepiness may be accounted for by making the recovery function linear below a certain point on the otherwise exponential function...
  47. ncbi Tolerance to shift work-how does it relate to sleep and wakefulness?
    John Axelsson
    National Institute for Psychosocial Medicine, Box 230, 171 77 Stockholm, Sweden
    Int Arch Occup Environ Health 77:121-9. 2004
    ....
  48. ncbi Effects of acutely displaced sleep on testosterone
    John Axelsson
    National Institute for Psychosocial Medicine, 171 77 Stockholm, Sweden
    J Clin Endocrinol Metab 90:4530-5. 2005
    ..It is not yet clear whether the diurnal variation in testosterone is regulated by circadian or homeostatic (sleep) influences...
  49. ncbi Different levels of work-related stress and the effects on sleep, fatigue and cortisol
    Anna Dahlgren
    National Institute for Psychosocial Medicine, Stockholm, Sweden
    Scand J Work Environ Health 31:277-85. 2005
    ..The aim of the study was to relate different levels of work stress to measures of sleep and the diurnal pattern of salivary cortisol and subjective sleepiness...
  50. ncbi Sleepiness and performance in response to repeated sleep restriction and subsequent recovery during semi-laboratory conditions
    John Axelsson
    Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Chronobiol Int 25:297-308. 2008
    ..Moreover, it is suggested to measure sleepiness in a standardized situation so as to minimize the influences of contextual factors...
  51. ncbi Subjective health perception in healthy young men changes in response to experimentally restricted sleep and subsequent recovery sleep
    Mats Lekander
    Stress Research Institute, Stockholm University, Stockholm, Sweden Osher Center for Integrative Medicine and Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden Electronic address
    Brain Behav Immun 34:43-6. 2013
    ..Larger experimental studies would be beneficial to further distinguish causation from association regarding the underpinnings of subjective health...
  52. ncbi Snoring and progression of coronary artery disease: The Stockholm Female Coronary Angiography Study
    Constanze Leineweber
    Karolinska Institute, Department of Public Health Sciences, Stockholm, Sweden
    Sleep 27:1344-9. 2004
    ..The aim of the study was to investigate the influence of snoring in combination with feelings of tiredness on the 3-year progression of atherosclerosis in women with cardiovascular disease...
  53. pmc Cross-lagged relationships between workplace demands, control, support, and sleep problems
    Linda L Magnusson Hanson
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Sleep 34:1403-10. 2011
    ..This study examines longitudinal, bidirectional relationships between work characteristics and sleep problems...
  54. ncbi Sleeping during the day: effects on the 24-h patterns of IGF-binding protein 1, insulin, glucose, cortisol, and growth hormone
    Javaid ur Rehman
    Section for Psychology, Department of Clinical Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
    Eur J Endocrinol 163:383-90. 2010
    ..We investigated how an acute shift of sleep to the daytime affected IGF-binding protein 1 (IGFBP1), which is a risk factor for diabetes...
  55. doi Early morning work--prevalence and relation to sleep/wake problems: a national representative survey
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, and Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Chronobiol Int 27:975-86. 2010
    ..However, difficulties in waking and disturbed sleep did not change with advanced start times. It was concluded that early start times are common and are associated with sleep problems and fatigue...
  56. ncbi Aircrew fatigue in trans-Atlantic morning and evening flights
    Claire Anne Eriksen
    National Institute for Psychosocial Factors and Health IPM, Karolinska Institutet, Stockholm, Sweden
    Chronobiol Int 23:843-58. 2006
    ..Evening flights involve higher levels of sleepiness than morning flights, presumably because of the close proximity in time to the circadian trough of alertness...
  57. ncbi Variation in sleepiness during early morning shifts: a mixed model approach to an experimental field study of train drivers
    Michael Ingre
    National Institute for Psychosocial Medicine IPM, Stockholm, Sweden
    Chronobiol Int 21:973-90. 2004
    ..Long drives without stops and other monotonous situations should have a higher risk rating for severe sleepiness in shifts with an early start before 06:00 h, compared to shifts that begin 2 h later...
  58. ncbi Subjective sleepiness, simulated driving performance and blink duration: examining individual differences
    Michael Ingre
    National Institute for Psychosocial Medicine, Stockholm, Sweden
    J Sleep Res 15:47-53. 2006
    ..The results have implications for any application that needs prediction at the subject level (e.g. driver fatigue warning systems) as well as for research design and the interpretation of group average data...
  59. ncbi Subjective sleepiness and accident risk avoiding the ecological fallacy
    Michael Ingre
    National Institute for Psychosocial Medicine IPM, and Department of Psychology, Stockholm University, Stockholm, Sweden
    J Sleep Res 15:142-8. 2006
    ..There were large individual differences in event propensity that complicates the prediction of absolute accident risk for individual subjects...
  60. ncbi The effects of driving situation on sleepiness indicators after sleep loss: a driving simulator study
    Anna Anund
    Clinical Neuroscience, Karolinska Institute, SE 177 71 Stockholm, Sweden
    Ind Health 47:393-401. 2009
    ..This suggests that it is important to monitor the driving situation in field operational tests of sleepy driving...
  61. doi Clinically diagnosed insomnia and risk of all-cause and diagnosis-specific sickness absence: a nationwide Swedish prospective cohort study
    Catarina Jansson
    1Division of Insurance Medicine, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Scand J Public Health 41:712-21. 2013
    ..There is, however, no previous nationwide cohort study of clinically diagnosed insomnia and risk of incident sickness absence...
  62. doi Predicting road crashes from a mathematical model of alertness regulation--The Sleep/Wake Predictor
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University and Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
    Accid Anal Prev 40:1480-5. 2008
    ..05 g/dl). It was concluded that the model is a good predictor of road crashes beyond that of alcohol level, and that interaction between the two carries a very high risk...
  63. ncbi Sleep characteristics and cardiovascular events in a large Swedish cohort
    Anna Westerlund
    Department of Medicine Solna, Clinical Epidemiology Unit, Karolinska Institutet, Eugeniahemmet T2, 171 76 Stockholm, Sweden
    Eur J Epidemiol 28:463-73. 2013
    ..Our results suggest that symptoms of sleep disturbance should be taken into account when assessing the association between short sleep and cardiovascular disease...
  64. ncbi The future of work hours--the European view
    Torbjorn Akerstedt
    IPM and Karolinska Institute, Box 230, 17177 Stockholm, Sweden
    Ind Health 43:80-4. 2005
    ..The EU work hour directive is intended to provide uniformity but permits a counterproductive "opting out", creating problems of imbalance...
  65. ncbi Apprehension of the subsequent working day is associated with a low amount of slow wave sleep
    Goran Kecklund
    National Institute for Psychosocial Medicine IPM, Karolinska Institutet, Box 230, 17177 Stockholm, Sweden
    Biol Psychol 66:169-76. 2004
    ..It is concluded that moderate "everyday" stress may disturb physiological restoration as indicated by the reduction of SWS...
  66. doi Disturbed sleep in shift workers, day workers, and insomniacs
    Torbjorn Akerstedt
    Stress Research Institute, University of Stockholm, Karolinska Institutet, Stockholm, Sweden
    Chronobiol Int 25:333-48. 2008
    ..The results suggest, at least with the present questionnaire methodology, that shift work does not appear to be a major source of sleep disturbances and that their complaint levels bear no resemblance to those seen in insomniac patients...
  67. ncbi Individual differences in the diurnal cortisol response to stress
    Anna Dahlgren
    National Institute for Psychosocial Medicine, Stockholm, Sweden
    Chronobiol Int 21:913-22. 2004
    ..The results suggest that one component modulating the cortisol response might be the level of exhaustion, probably related to work overload. Higher levels of stress in exhausted individuals might suppress morning cortisol levels...
  68. ncbi Performance and sleepiness during a 24 h wake in constant conditions are affected by diet
    Arne Lowden
    National Institute for Psychosocial Medicine, Karolinska Institutet, Stockholm, Sweden
    Biol Psychol 65:251-63. 2004
    ..The study demonstrated that the HC-diet caused larger oscillation in performance and increased sleepiness as compared to HF-diet throughout day and night...
  69. ncbi Microarousals during sleep are associated with increased levels of lipids, cortisol, and blood pressure
    Mirjam Ekstedt
    Department of Public Health Science, Karolinska Institutet, Stockholm, Sweden
    Psychosom Med 66:925-31. 2004
    ..A second purpose was to relate the number of arousals to mood, stress, work characteristics, and other possible predictors in daily life...
  70. doi Playing a violent television game affects heart rate variability
    Malena Ivarsson
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Acta Paediatr 98:166-72. 2009
    ..To investigate how playing a violent/nonviolent television game during the evening affects sympathetic and parasympathetic reactions during and after playing as well as sleep quality during the night after playing...
  71. doi Shift work at young age is associated with increased risk for multiple sclerosis
    Anna Karin Hedström
    Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
    Ann Neurol 70:733-41. 2011
    ..Environmental factors play a prominent role in multiple sclerosis (MS) etiology. The aim of this study was to investigate the potential association between shift work and MS risk, which has previously never been investigated...
  72. pmc Prevalence of night eating in obese and nonobese twins
    Sanna Tholin
    Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
    Obesity (Silver Spring) 17:1050-5. 2009
    ..It revealed that NE is 2.5 and 2.8 times more common in obese men and women compared to normal weight men and women. Furthermore that NE is associated with binge eating and sleep-related problems...
  73. pmc Novel biochemical markers of psychosocial stress in women
    Marie Asberg
    Department of Clinical Sciences, Karolinska Institute, Stockholm, Sweden
    PLoS ONE 4:e3590. 2009
    ..Prolonged psychosocial stress is a condition assessed through self-reports. Here we aimed to identify biochemical markers for screening and early intervention in women...
  74. doi Effects of context on sleepiness self-ratings during repeated partial sleep deprivation
    Torbjorn Akerstedt
    Stress Research Institute, Stockholm University, Stockholm, Sweden
    Chronobiol Int 25:271-8. 2008
    ..1 KSS units compared to the level of sleepiness self-rated at the end of the reaction-time test. Thus, the results of this study indicate that the context of a sleepiness rating affects the outcome of the rating...
  75. ncbi Less effective executive functioning after one night's sleep deprivation
    Jens P Nilsson
    National Institute for Psychosocial Medicine, Stockholm, Sweden
    J Sleep Res 14:1-6. 2005
    ..There were no group differences on psychomotor vigilance, verbal or visuo-spatial working memory. This extends previous knowledge of performance effects of SD, and may be of special importance for individuals with cognitive work tasks...
  76. ncbi Disturbed sleep and fatigue in occupational burnout
    Mirjam Ekstedt
    National Institute of Psychosocial Factors and Health, Box 230, SE 17177 Stockholm, Sweden
    Scand J Work Environ Health 32:121-31. 2006
    ..The purpose of this study was to investigate sleep with polysomnography and self-ratings and the diurnal pattern of sleepiness and fatigue in a group suffering from severe occupational burnout...
  77. ncbi Awakening from sleep
    Torbjorn Akerstedt
    Karolinska Institute, Stockholm, Sweden
    Sleep Med Rev 6:267-86. 2002
    ..Daytime functioning is shown in insomniac patients and compared to other pathologies like sleep apnea. A final section evokes links between some types of night waking and psychological factors...
  78. ncbi The effects of 884 MHz GSM wireless communication signals on headache and other symptoms: an experimental provocation study
    Lena Hillert
    Department of Public Health Sciences, Division of Occupational Medicine, Karolinska Institutet, Stockholm, Sweden
    Bioelectromagnetics 29:185-96. 2008
    ..The current study indicates a need to better characterize study participants in mobile phone exposure studies and differences between symptom and non-symptom groups...
  79. ncbi Effect of accumulated night work during the working lifetime, on subjective health and sleep in monozygotic twins
    Michael Ingre
    National Institute for Psychosocial Medicine IPM, Stockholm, Sweden
    J Sleep Res 13:45-8. 2004
    ..67) and disturbed sleep (RR = 2.83) indicating a higher risk of developing complaints to former night workers. There was neither a dose-dependent effect of night work nor an interaction effect with gender observed...