Age-related changes in the association of sleep satisfaction with sleep quality and sleep–wake pattern
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Abstract
Age-specific relationship of sleep–wake pattern with night sleep satisfaction was examined to address a question of why sleep satisfaction does not accurately reflect the age-associated worsening of subjective and objective indicators of night sleep quality. Sleep history for 1 week prior to the experiment was reported by 160 participants of the sleep deprivation experiments. Sleep satisfaction score was calculated by averaging responses to the question: “Did you have a good sleep? (No = 1… [I slept] Very well = 5)” across the pre-experimental days. It was tested whether this score can be predicted by other self-reports (sleepiness after sleepless night, nap frequency, sleep latency, total sleep duration, times for going to bed and awakening, and scores on scales for assessing morning and evening lateness, anytime and nighttime sleepability, and anytime and daytime wakeability). The characteristics of the sleep–wake pattern exhibited the expected changes on the interval of ages from early to late adulthood. Sleep satisfaction score was significantly associated with some of them in any of the three age groups (≤ 25, 26–45, and 46–67 years). Particularly, the strongest predictor of this score in the youngest participants was late awakening, while morning earliness was the strongest predictor of this score in older participants. Therefore, perception of a good night’s sleep remains adjusted across the lifespan to the typical for each age’s sleep–wake pattern. The ability for such adjustment can persist in middle-aged adults and elderly people due to the age-associated strengthening of their wake drive relative to the weakening drive for sleep.
Keywords
Normal sleep Aging Sleep–wake habits Sleep complaints ChronotypeNotes
Acknowledgements
The experiments were supported by the Russian Foundation for Basic Research (Grants 07-06-00263-а, 10-06-00114-а, 13-06-00042-a, and 16-06-00235-a) and the Russian Foundation for Humanities (Grants 06-06-00375-a, 12-06-18001-e, and 15-06-10403-a). The author is indebted to Olga Donskaya and Dr. Evgeniy Verevkin for their help in planning this experiment and collection of experimental data.
Compliance with ethical standards
Ethical standards and ethical committee permission
The experiments have been performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments. Their protocols were approved by the Ethics Committee of the Institute (#02-07.2015).
Human participants
This research involves human participants.
Informed consent
Informed written consent (in Russian) was obtained from all the individual participants included in the study as paid volunteers.
Conflict of interest
The author declares that he has no conflict of interest.
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