Epidemiology of accelerometer-based sleep parameters in US school-aged children and adults: NHANES 2011–2014

Abstract

We aimed to provide objectively measured sleep parameters across lifespan by sex and race in a national representative sample of US population. The study included 11,279 participants 6 years and older from the National Health and Nutrition Examination Survey (NHANES) 2011–2014, who had at least 3 days of valid sleep parameters calculated from 7-day 24-h accelerometer recording. Sleep duration showed a U-shaped association with age and reached the minimum at age 40 and started to increase again around age 50. The clock time for sleep onset (CTSO) delayed with age and reached the maximum at about age 20. CTSO then advanced until age 50, leveled off until age 70, then advanced again after age 70. Sleep efficiency showed an overall decreasing trend across the lifespan but stabilized from age 30 to about age 60. US young adults in age 20 s are the ones who slept at the latest around midnight, while the middle aged US residents between 40 and 50 years old slept the least. Females generally present longer sleep duration than males, while more likely to have later sleep onset, particularly at older ages. Non-Hispanic Blacks showed worse sleep characteristics, i.e. sleep later, sleep shorter, and sleep less efficiently, compared to other racial groups. In conclusion, this study provides valuable insights on the characteristics of sleep habits of residents of the United States by using objectively measurements of sleep parameters and will help guide personalized advice on sleep hygiene.

Sex Differences in Clinical Features, Treatment, and Lifestyle Factors in Patients With Cluster Headache

“…Studies on sex differences for sleep in the general population report longer sleep duration for female participants. 37 In addition, more female than male participants report inadequate sleep, which, together with the observation that male persons more likely function well with less than 7 hours of sleep, suggests that female persons may be more susceptible to clinical symptoms from sleep difficulties and could potentially be more debilitated by nocturnal cluster headache attacks. 38,39 With respect to treatment for cluster headache attacks, there was no difference in use of acute medication between male and female participants, except for oxygen, which was reported more frequently in female participants (37%).…”

Wearable-based Physical Activity as a Digital Biomarker of Inflammation, Biological Age, and Mortality: A Hierarchical Clustering Analysis of NHANES 2011-2014

“…1). In accordance with previous studies, we set MIMS triaxial values as missing for the following three conditions: (1) the MIMS triaxial value is coded as '-0.01'; (2) estimated wake/sleep/wear status during the minute is "non wear"; (3) minute data quality ag count is larger than '0' 37,38 .…”

Physical Activity Levels and Sleep in Schoolchildren (6–17) with and without School Sport

“…As can be seen in Tables 3 and 4, all sleep parameters are higher in children aged 6-12 years than in adolescents aged 12-17 years, as in other studies [72,73], irrespective of sex. This may be related to increased pressure, stress and anxiety in adolescence due to academic and other reasons [74,75]. However, sleep efficiency is higher in adolescents (12-17 years) in contrast to other studies where sleep efficiency parameters decline with age [72,76] which would not represent a sleep disorder problem in this group (12-17 years) [77].…”