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Title: Sleep/wake cycle parameters and sleep/fatigue complaints in female night workers
Authors: Rotenberg, L.
Moreno, C.
Benedito-Silva, A. A.
Menna-Barreto, L.
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Keywords: sleep-wake cycle
sleep/fatigue complaints
Issue Date: 1-Dec-1998
Publisher: Swets Zeitlinger Publishers
Citation: Biological Rhythm Research. Lisse: Swets Zeitlinger Publishers, v. 29, n. 5, p. 585-590, 1998.
Abstract: Adaptation to shift-work is influenced by the way workers schedule their lives, including allocation of sleep episodes. Female workers (n = 29) engaged at an assembly line were studied as to individual differences in sleep parameters in order to verify whether those differences could be related to the manifestation of sleep and fatigue complaints. the sample was composed of women (20-40 y) working at night from Monday to Friday. Sleep data were based on daily sleep logs which were filled out by the workers for 10 consecutive weeks. in the analyses of sleep data both diurnal episodes between consecutive night shifts and noctural sleep episodes preceding working nights were taken into account. Worker's complaints were analyzed through questions extracted from an interview form encompassing questions on fatigue associated with the work schedule and on dissatisfaction with sleep on weekdays and weekends. the analysis of diurnal episodes showed no significant correlation between the total amount of sleep per day and the total number of complaints. Nevertheless, the latter was correlated to the length of the first sleep episode on a day, which usually began in the morning. As to sleep onset times, significant correlations were not detected concerning the first diurnal episodes. the analysis of nocturnal episodes did not reveal any significant correlation between sleep parameters and complaints. Results indicate that workers whose sleep onsets were allocated to the morning and were able to sleep for many consecutive hours, tended to show less complaints, suggesting that the temporal allocation of diurnal sleep and its length are relevant in the determination of how these workers perceive fatigue and sleep quality.
ISSN: 0929-1016
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