Interaction of age with shift-related sleep-wakefulness, sleepiness, performance, and social life

Experimental Aging Research
A BonnefondJ Virkkala

Abstract

It is not clear how the age-related changes in sleep are related to performance and subjective sleepiness at different time of the day. The aim of the present study was to study work shift related interactions of age with sleep-wakefulness, performance, and social life. A representative sample of aircraft maintenance workers in a continuous three-shift system was studied by a questionnaire (n = 275) and an on-site field (n = 49) study. In the field study, sleep length and quality and different ratings of social and other activities were studied with an actigraphy and a Pocket PC diary during 15 consecutive days. Subjective sleepiness (KSS) and vigilance performance (PVT) were registered at work. Although the shift type influenced the sleep, subjective sleepiness, performance, and social life, age was distinctly related only to shift-related changes in the amount of sleep, subjective sleepiness, and psychomotor vigilance. Night shifts were related with shorter sleep, decreased performance, and increased sleepiness. Although subjective sleepiness was greatest among the youngest (25-34 years) age group during the morning and the night shifts, the increase of performance lapses was higher among the middle-aged (35-49 years) and sen...Continue Reading

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