The Amount of Diurnal Sleep, and Complaints of Fatigue and Poor Sleep, in Night-Working Women: The Effects of Having Children

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Abstract
This study deals with female industrial night workers. There is little scientific literature on this topic since, until recently, such shift systems have in most countries been restricted to men. The amount of diurnal sleep, as well as complaints about fatigue and poor sleep, were compared in women who were (n = 17) or were not (n = 26) caring for children. The women were engaged at an assembly line, working nights (22:00-06:00) from Monday to Friday. They filled out sleep logs for 10 consecutive weeks and were interviewed about complaints concerned with fatigue and poor sleep. A comparison of the diurnal sleeps taken between consecutive night shifts showed that the average total length of daily sleep, as well as the time of onset of the first sleep, did not differ between the groups; however, workers who had children tended to show, in comparison with their childless colleagues, more sleep episodes per day and a shorter first sleep. The total number of complaints about poor sleep and fatigue did not differ between the groups; nevertheless, workers with children complained more of difficulty in falling asleep, had a greater dissatisfaction with the amount of sleep on weekdays, and tended to show an increasing fatigue as the week progressed. We conclude that there are social pressures in women who care for children that are in addition to those that are a general consequence of night work. These results reinforce a need for the implementation of measures that organise child care, so helping a mother who wishes to work also outside the home.

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