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Sökning: WFRF:(Åkerstedt Torbjörn) > Konferensbidrag

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  • Garefelt, Johanna, et al. (författare)
  • Work and sleep – the effects of stress, physical work environment and work hours : A prospective study using the SLOSH database
  • 2013
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • METHODS: Data was derived from two waves of SLOSH (The Swedish Longitudinal Occupational Survey of Health), a representative sample of the working population in Sweden. Respondents in the present study sample were gainfully employed in both 2008 (T1) and in 2010 (T2), and without sleep disturbances at T1 (n=5741, 54 % women, 46 % men, aged 24-72 years). Between T1 and T2 a total number of 441 people (8 %) developed sleep disturbances. Logistic regression was made in five hierarchical models with new cases of disturbed sleep as the dependent variable. Factors studied were changes in physical work environment, work hours, demands, control, support and stress between T1 and T2; increased or decreased levels of exposure, as well as consistently high or low levels. RESULTS: In the fully adjusted model, stress showed the strongest association with new cases of disturbed sleep. Increased stress levels had an OR of 2.9 (95% CI 2.0-4.3) and consistently high levels of stress had an OR of 2.8 (1.9-4.2). Increased levels of demands showed a weaker association, OR=1.8 (1.2-2.6), whereas consistently high levels of demands did not show significant results. Decreased levels of social support showed an increased OR of 2.3 (1.6-3.3), as did consistently low levels of social support with an OR of 1.6 (1.1-2.3). Neither changes in control nor changes in work hours showed any significant results. Increased exposure to excessive heat, cold or draught showed a OR of 1.7 (1.1-2.8) whereas changes in heavy physical labour, noise at work, and poor or excessively bright light did not show an association with new cases of sleep disturbances in the fully adjusted model.
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  • Gerhardsson, Andreas, et al. (författare)
  • The effect of sleep loss on emotional working memory
  • 2016
  • Ingår i: Abstracts. - : Wiley. ; , s. 17-18
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Objectives: Emotional stimuli differently affect working memory (WM) performance. As sleep deprivation has a known impact on both emotion and WM our aim was to investigate how one night without sleep affects emotional WM performance. Methods: Healthy subjects (n = 56; age 18–30 years) were randomized to a total sleep deprivation (TSD) or a rested control (RC) condition. Subjects rated their affective state and performed a 1 and a 3-back WM task consisting of neutral, positive and negative pictures at 3 pm or 6 pm (balanced) the day after sleep manipulation. Accuracy (d’) and target response time (RT) were used as outcomes. Results: In the TSD condition, subjects rated themselves as less positive (P = 0.006) but not more negative than in the RC condition. In the WM task, TSD had a detrimental effect on accuracy (P = 0.03) regardless of difficulty. Moreover, accuracy was higher in the 1-back than in the 3-back (P < 0.001) and higher for neutral compared to both negative and positive stimuli (Ps < 0.05). RT was faster for positive compared to negative and neutral stimuli (Ps < 0.05). The latter effect was particularly pronounced in the TSD condition as shown by a condition*valence interaction (P < 0.03). Conclusions: One night of total sleep loss impaired emotional WM accuracy. Noticeable, RT was faster for positive stimuli compared to negative and neutral stimuli. This effect was particularly pronounced after sleep loss. This suggests that sleep loss strengthens the opposing effects of positive and negative stimuli on WM performance, possibly due to increased emotion reactivity.
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