OBJECTIVES: Little evidence exists to support the common assertion that adult sleep
duration has declined. We investigated secular trends in sleep duration over the past 40 …

The common assumption that population sleep duration has declined in the past few
decades has not been supported by recent reviews, which have been limited to self-reported …

Abstract Study Objective: The trend in sleep duration in the United States population
remains uncertain. Our objective was to examine changes in sleep duration from 1985 to …

We aimed to obtain reliable reference charts for sleep duration, estimate the prevalence of
sleep complaints across the lifespan and identify risk indicators of poor sleep. Studies were …

Short (≤ 6 hours) and long (> 9 hours) sleep durations are risk factors for mortality and
morbidity. To investigate whether the prevalences of short and long sleep durations have …

Sleep is important for the physical, social and mental well-being of both children and adults.
Over the years, there has been a general presumption that sleep will inevitably decline with …

A hypothesis concerning habitual sleep reduction and its adverse consequences among
general population in modern societies has received wide publicity in the mass media …

Objective The objective was to conduct a scientifically rigorous update to the National Sleep
Foundation's sleep duration recommendations. Methods The National Sleep Foundation …

BACKGROUND: Sleep deficits are associated with a wide range of detrimental physical and
mental health outcomes. There is concern that children are not getting enough sleep, and …

This article provides recent estimates of the duration and quality of sleep of Canadian adults
and of the percentage who adhere to sleep duration guidelines (7 to 9 hours per night at …