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Sleep Health

Orfeu M Buxton, Steven A Shea
No abstract text is available yet for this article.
December 2018: Sleep Health
Mario Andre Leocadio-Miguel, Breno Tércio Carneiro, Adriana Ximenes-da-Silva, Wolnei Caumo, Dora Grassi-Kassisse, Mario Pedrazzoli
OBJECTIVES: We searched for interactions between PER3 gene VNTR polymorphism, latitude, sleep duration, diurnal sleepiness, and social jetlag. DESIGN: We selected samples from 3 distinct cities along the latitudinal range of Brazil and comprising the same time zone. SETTING: Undergraduate universities located in 3 major cities of Brazil. PARTICIPANTS: A total of 980 undergraduate students: 276 from Maceio (latitude 9°), 358 from Campinas (latitude 22°), and 346 from Porto Alegre (latitude 30°)...
December 2018: Sleep Health
Jesse Doolin, Jose Enrique Vilches, Cheryl Cooper, Christine Gipson, William Sorensen
OBJECTIVE: This study investigated predictors of poor sleep quality among American and Bolivian students. DESIGN: A cross-sectional survey was designed and administered to undergraduate university students. SETTING AND PARTICIPANTS: Psychology classes from 2 public universities (Texas, USA, and Bolivia) were convenience sampled (n = 80 American students; 60 Bolivian students). MEASUREMENTS: We used a sleep quality index and the Perceived Stress Scale...
December 2018: Sleep Health
Dale E Rae, Paula R Pienaar, Rob H P Henst, Laura C Roden, Julia H Goedecke
OBJECTIVES: South African women have disproportionately high levels of overweight and obesity, and ethnic differences in obesity and insulin resistance have been observed. We investigated associations between self-reported sleep duration, obesity and insulin resistance in Black and White South African women. DESIGN: Cross-sectional. PARTICIPANTS: Black normal-weight (n = 122), Black obese (n = 133), White normal-weight (n = 87) and White obese (n = 63) urban South African women, aged 18 to 45y...
December 2018: Sleep Health
Oluwatosin E Olorunmoteni, Adesegun O Fatusi, Morenikeji A Komolafe, Akinlolu Omisore
OBJECTIVES: To determine the sleep pattern among Nigerian school-attending adolescents and its association with socioenvironmental factors and the use of electronic devices. DESIGN: Descriptive cross-sectional survey. SETTING: Public and private secondary schools in Ile-Ife, Osun State, Nigeria. PARTICIPANTS: Multistage sampling technique was used to select 346 school-attending adolescents aged 10-19 years. MEASUREMENTS: A modified version of the Adolescent Sleep Habits Survey Questionnaire was administered to respondents in the school setting using the facilitated self-administration method...
December 2018: Sleep Health
Aaron Schokman, Yu Sun Bin, Guido Simonelli, Jonathon Pye, Richard Morris, Athula Sumathipala, Sisira H Siribaddana, Matthew Hotopf, Fruhling Rijsdijk, Kaushalya Jayaweera, Nick Glozier
OBJECTIVES: Describe sleep duration in adult Sri Lankans and determine the bias and agreement of self-report and actigraphic assessments. DESIGN: Validation sub-study nested within the Colombo Twin and Singleton Study (2012-2015). SETTING: Colombo, Sri Lanka. PARTICIPANTS: 175 adults with actigraphy, randomly selected from 3497 participants with self-reported sleep assessed in a population-based cohort. MEASUREMENTS: Self-reported sleep duration, ascertained by the Pittsburgh Sleep Quality Index (PSQI), was compared to a minimum of four days of actigraphy...
December 2018: Sleep Health
Virginia J Vitzthum, Jonathan Thornburg, Hilde Spielvogel
OBJECTIVES: We tested 4 main predictions, derived from life history theory and self-evident human diurnality, regarding maternal sleep behaviors in a non-industrialized population in which mother-nursling co-sleeping is universal and prolonged: (1) Night breastfeeding incurs a sleep cost to co-sleeping mothers; (2) Night breastfeeding increases with infant age, causing mothers to sleep less; (3) Sleep duration co-varies with darkness duration; (4) Access to electricity reduces sleep duration...
December 2018: Sleep Health
Alyssa N Crittenden, David R Samson, Kristen N Herlosky, Ibrahim A Mabulla, Audax Z P Mabulla, James J McKenna
OBJECTIVE: Despite widespread interest in maternal-infant co-sleeping, few quantified data on sleep patterns outside of the cultural west exist. Here, we provide the first report on co-sleeping behavior and maternal sleep quality among habitually co-sleeping hunter-gatherers. DESIGN: Data were collected among the Hadza of Tanzania who live in domiciles constructed of grass huts with no access to synthetic lighting or climate controlled sleeping environments. Using interview data, we recorded baseline ethnographic data on co-sleeping...
December 2018: Sleep Health
Helen L Ball, Pamela S Douglas, Kavindri Kulasinghe, Koa Whittingham, Peter Hill
AIM: To evaluate parental perspectives on the acceptability and usefulness of a 'cued-care' approach to infant sleep implemented in an Australian primary care setting. The Possums Infant Sleep Program aims to empower parents to better understand their infant's sleep and their responses to it, and optimize healthy function of the infant's biological sleep regulators to protect against excessive night-waking. METHODS: The evaluation was undertaken by an independent infant sleep researcher, with no previous involvement in the Possums program...
December 2018: Sleep Health
A Roger Ekirch
This article, in noting the recent interest of historians in sleep, assesses both the difficulties and the advantages of studying human sleep in the past. The history of sleep affords important new perspectives not only on everyday life in earlier centuries but also on the underlying origins of contemporary sleep disorders, including middle-of-the-night insomnia.
December 2018: Sleep Health
David R Samson, Alyssa N Crittenden, Ibrahim A Mabulla, Audax Z P Mabulla, Charles L Nunn
OBJECTIVES: The lunar cycle is expected to influence sleep-wake patterns in human populations that have greater exposure to the environment, as might be found in forager populations that experience few environmental buffers. We investigated this "moonlight" hypothesis in two African populations: one composed of hunter-gatherers (with minimal environmental buffering) and the other rural agriculturalists (with low-to-moderate environmental buffering). SETTING: Research was conducted on Hadza hunter-gatherers from the Sengele community near Lake Eyasi in northern Tanzania and in Mandena, Madagascar, in a rural community of approximately 4000 farmers...
December 2018: Sleep Health
Sean P Prall, Gandhi Yetish, Brooke A Scelza, Jerome M Siegel
OBJECTIVE: To understand the basics of sleep quality in a pastoralist population and to explore predictors of this variation. DESIGN: Cross-sectional. SETTING: Northern Namibia, dry seasons of 2016 and 2017. PARTICIPANTS: The Himba, a nonindustrial seminomadic agropastoralist population without access to the electrical grid. MEASUREMENTS: Using Actiwatch-2 devices, 75 participants completed 721 days of wear...
December 2018: Sleep Health
Helene Emsellem
No abstract text is available yet for this article.
December 2018: Sleep Health
Gandhi Yetish, David Samson
No abstract text is available yet for this article.
December 2018: Sleep Health
Meir H Kryger, Isabella Siegel
No abstract text is available yet for this article.
December 2018: Sleep Health
Katie M Lawson, Soomi Lee
OBJECTIVES: Cross-sectional research has found that shorter and poorer sleep are associated with lower work performance and greater work-to-family conflict (WTFC). However, we know little about daily mechanisms linking sleep, work performance, and WTFC. This study tested whether previous nights' sleep was linked to next day WTFC, mediated by work performance. DESIGN: Daily interview methodology. SETTING: US extended-care workplaces. PARTICIPANTS: One hundred seventy-one female employees with children aged 9 to 17 years...
October 2018: Sleep Health
Erin E Flynn-Evans, Lucia Arsintescu, Kevin Gregory, Jeffrey Mulligan, Jessica Nowinski, Michael Feary
INTRODUCTION: It is established that shiftwork causes sleep loss and circadian misalignment. Individuals who work non-traditional day shifts that encroach into typical sleep times, such as those in the service and transportation sectors, may also experience sleep and circadian disruption. We aimed to determine how neurobehavioral performance and sleep would be affected by work start time among individuals working a non-traditional daytime shift pattern. METHODS: We collected sleep diaries, wrist-worn actigraphy (CamNtech, Cambridge UK), and the psychomotor vigilance task (PVT) from 44 pilots (4F) who worked a shift rotation consisting of a five-day baseline block starting in the mid-morning (baseline), five early shifts (early), five high workload midday shifts (midday), and five days of late shifts (late), each separated by 3-4 days off...
October 2018: Sleep Health
Guido Simonelli, Giannina Bellone, Diego Golombek, Daniel Pérez Chada, Nick Glozier, Vincent F Capaldi, Daniel E Vigo, Meir H Kryger
OBJECTIVES: To describe the hours of service provisions in continental Latin America. DESIGN: Information on regulations of service hours was extracted from either the national transportation authorities or ministries of transportation (or the equivalent institution) from each country. SETTING: Seventeen sovereign countries in continental Latin America (Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay, Venezuela)...
October 2018: Sleep Health
Monica E Hartmann, J Roxanne Prichard
OBJECTIVES: The objective of this study is to determine to what degree sleep disturbances predict academic success, relative to other known risk factors for decreased academic performance. METHODS: We performed regression analyses on data from the Spring 2009 American College Health Association National College Health Assessment II dataset (n=55,322 students) to isolate the relative contribution of the frequency of sleep problems in the previous week to GPA and the likelihood of withdrawing from a course...
October 2018: Sleep Health
Anna Alkozei, Monika Haack, Jeff Skalamera, Ryan Smith, Brieann C Satterfield, Adam C Raikes, William Ds Killgore
OBJECTIVES: Previous work suggests that sleep restriction (SR) reduces cognitive control and may increase negative implicit biases. Here we investigated whether SR might influence decision making on a social-evaluative task where individuals had to make judgments of threat based on facial photographs. Furthermore, we investigated the effect of changes in negative implicit biases as a result of sleep restriction on this decision-making task. DESIGN: Fourteen healthy adults underwent two 3-week counterbalanced in-laboratory stays (chronic SR and control sleep [CS] conditions)...
October 2018: Sleep Health
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