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https://www.readbyqxmd.com/read/29642757/associations-between-chronotype-morbidity-and-mortality-in-the-uk-biobank-cohort
#1
Kristen L Knutson, Malcolm von Schantz
Later chronotype (i.e. evening preference) and later timing of sleep have been associated with greater morbidity, including higher rates of metabolic dysfunction and cardiovascular disease (CVD). However, no one has examined whether chronotype is associated with mortality risk to date. Our objective was to test the hypothesis that being an evening type is associated with increased mortality in a large cohort study, the UK Biobank. Our analysis included 433 268 adults aged 38-73 at the time of enrolment and an average 6...
April 11, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29624593/work-routines-moderate-the-association-between-eveningness-and-poor-psychological-well-being
#2
Felipe Gutiérrez Carvalho, Camila Morelatto de Souza, Maria Paz Loayza Hidalgo
Well-being is a useful screening method for the detection of mood disorders. Evidence associating psychological well-being with sleep-wake patterns exists, as well as associations with sleep-wake patterns, work-related parameters, and perceived self-efficacy. Despite the growing research regarding the relationship between these factors and mental health, there are few studies that analyze them together. OBJECTIVE: To investigate if the association between sleep-wake patterns and psychological well-being is mediated or moderated by perceived self-efficacy, work flexibility and work routines...
2018: PloS One
https://www.readbyqxmd.com/read/29609867/circadian-health-differs-between-boys-and-girls-as-assessed-by-non-invasive-tools-in-school-aged-children
#3
Gloria Maria Barraco, Nuria Martínez-Lozano, Claudia Vales-Villamarín, María Del Carmen Blaya, Rafael Rios, Juan Antonio Madrid, Paul Fardy, Marta Garaulet
BACKGROUND & AIMS: Assessment of circadian health is confined to adults. However, understanding circadian status of school-aged children is necessary due to its health implications. The aim was to develop 1) a protocol to assess circadian function in school-aged children by combining the best non-invasive tools previously validated in adults; 2) a score to capture circadian function in children including food timing. This protocol will allow to explore gender differences and to compare the circadian function of school-aged children with adults from the same Mediterranean area...
March 21, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29551440/racing-the-clock-the-role-of-circadian-rhythmicity-in-addiction-across-the-lifespan
#4
REVIEW
Danielle Gulick, Joshua J Gamsby
Although potent effects of psychoactive drugs on circadian rhythms were first described over 30 years ago, research into the reciprocal relationship between the reward system and the circadian system - and the impact of this relationship on addiction - has only become a focus in the last decade. Nonetheless, great progress has been made in that short time toward understanding how drugs of abuse impact the molecular and physiological circadian clocks, as well as how disruption of normal circadian rhythm biology may contribute to addiction and ameliorate the efficacy of treatments for addiction...
March 15, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29530363/comprehensive-assessment-of-the-impact-of-life-habits-on-sleep-disturbance-chronotype-and-daytime-sleepiness-among-high-school-students
#5
Akiyoshi Shimura, Sakai Hideo, Yoshikazu Takaesu, Ryota Nomura, Yoko Komada, Takeshi Inoue
OBJECTIVE: Sleep affects adolescents in various ways. However, the effects of multiple factors on sleep hygiene remain unclear. A comprehensive assessment of the effects of life habits on sleep in high-school students was conducted. METHODS: A cross-sectional survey of 344 high school students (age range 15-17; 171 boys, 173 girls) in Tokyo, Japan was conducted in 2015. Complete responses were provided by 294 students. Demographic variables, Pittsburgh Sleep Quality Index (PSQI), diurnal type scale, Pediatric Daytime Sleepiness Scale (PDSS), and life habits such as dinnertime, viewing electronic displays, caffeine intake, sunlight in the morning, and the brightness of the room in the night were asked...
April 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29498667/long-term-melatonin-therapy-for-adolescents-and-young-adults-with-chronic-sleep-onset-insomnia-and-late-melatonin-onset-evaluation-of-sleep-quality-chronotype-and-lifestyle-factors-compared-to-age-related-randomly-selected-population-cohorts
#6
Tom C Zwart, Marcel G Smits, Toine C G Egberts, Carin M A Rademaker, Ingeborg M van Geijlswijk
The extent of continuance of melatonin therapy initiated in pre-pubertal children with chronic sleep onset insomnia (CSOI) was investigated in young adult life. Sleep timing, sleep quality, adverse events, reasons for cessation of therapy, and patient characteristics with regard to therapy regimen, chronotype and lifestyle factors possibly influencing sleeping behavior were assessed. With an online survey using questionnaires (Pittsburgh Sleep Quality Index, Insomnia Severity Index, Morningness-Eveningness Questionnaire, and Munich Chronotype Questionnaire), outcomes were measured and compared with age-related controls...
March 2, 2018: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/29482662/bright-light-therapy-versus-physical-exercise-to-prevent-co-morbid-depression-and-obesity-in-adolescents-and-young-adults-with-attention-deficit-hyperactivity-disorder-study-protocol-for-a-randomized-controlled-trial
#7
Jutta S Mayer, Katharina Hees, Juliane Medda, Oliver Grimm, Philip Asherson, Mariano Bellina, Michael Colla, Pol Ibáñez, Elena Koch, Antonio Martinez-Nicolas, Adrià Muntaner-Mas, Anna Rommel, Nanda Rommelse, Saskia de Ruiter, Ulrich W Ebner-Priemer, Meinhard Kieser, Francisco B Ortega, Johannes Thome, Jan K Buitelaar, Jonna Kuntsi, J Antoni Ramos-Quiroga, Andreas Reif, Christine M Freitag
BACKGROUND: The risk for major depression and obesity is increased in adolescents and adults with attention-deficit / hyperactivity disorder (ADHD) and adolescent ADHD predicts adult depression and obesity. Non-pharmacological interventions to treat and prevent these co-morbidities are urgently needed. Bright light therapy (BLT) improves day-night rhythm and is an emerging therapy for major depression. Exercise intervention (EI) reduces obesity and improves depressive symptoms. To date, no randomized controlled trial (RCT) has been performed to establish feasibility and efficacy of these interventions targeting the prevention of co-morbid depression and obesity in ADHD...
February 26, 2018: Trials
https://www.readbyqxmd.com/read/29479768/evening-use-of-caffeine-moderates-the-relationship-between-caffeine-consumption-and-subjective-sleep-quality-in-students
#8
Mirjam L Kerpershoek, Niki Antypa, Julia F Van den Berg
Caffeine is often used to reduce sleepiness; however, research suggests that it can also cause poor sleep quality. The timing of caffeine use, amongst other factors, is likely to be important for the effects it has on sleep quality. In addition, individual differences exist in the effect of caffeine on sleep quality. This cross-sectional study investigated the influence of the timing of caffeine consumption on and a possible moderating role of chronotype in the relationship between caffeine consumption and sleep quality in 880 students (74...
February 25, 2018: Journal of Sleep Research
https://www.readbyqxmd.com/read/29413871/time-drawings-spatial-representation-of-temporal-concepts
#9
María Juliana Leone, Alejo Salles, Alejandro Pulver, Diego Andrés Golombek, Mariano Sigman
Time representation is a fundamental property of human cognition. Ample evidence shows that time (and numbers) are represented in space. However, how the conceptual mapping varies across individuals, scales, and temporal structures remains largely unknown. To investigate this issue, we conducted a large online study consisting in five experiments that addressed different time scales and topology: Zones of time, Seasons, Days of the week, Parts of the day and Timeline. Participants were asked to map different kinds of time events to a location in space and to determine their size and color...
March 2018: Consciousness and Cognition
https://www.readbyqxmd.com/read/29408158/course-risk-factors-and-mental-health-outcomes-of-excessive-daytime-sleepiness-in-rural-chinese-adolescents-a-one-year-prospective-study
#10
Chunliu Luo, Jihui Zhang, Weijun Chen, Wanxian Lu, Jiyang Pan
BACKGROUND: This study aimed to examine the one-year incidence and persistence of excessive daytime sleepiness (EDS) in rural Chinese adolescents and their risk factors. In addition, we also aimed to explore the potential bidirectional associations of EDS with anxiety symptoms and depressive symptoms. METHODS: A total of 3736 adolescents from 5 high schools from rural area in the south China were eligible for follow-up. Among them, 2787 responded to follow-up after one year...
February 1, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29381407/premature-birth-and-circadian-preference-in-young-adulthood-evidence-from-two-birth-cohorts
#11
Johan Björkqvist, Anu-Katriina Pesonen, Liisa Kuula, Hanna-Maria Matinolli, Aulikki Lano, Marika Sipola-Leppänen, Marjaana Tikanmäki, Dieter Wolke, Marjo-Riitta Järvelin, Johan G Eriksson, Sture Andersson, Marja Vääräsmäki, Kati Heinonen, Katri Räikkönen, Petteri Hovi, Eero Kajantie
A preference for eveningness (being a "night owl") and preterm birth (<37 weeks of gestation) are associated with similar adversities, such as elevated blood pressure, impaired glucose regulation, poorer physical fitness, and lower mood. Yet, it remains unclear if and how preterm birth is associated with circadian preference. The aim of this study was to assess this association across the whole gestation range, using both objective and subjective measurements of circadian preference. Circadian preference was measured among 594 young adults (mean age 24...
January 30, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29363987/association-of-possible-sleep-bruxism-in-children-with-different-chronotype-profiles-and-sleep-characteristics
#12
Mariana Batista Ribeiro, Daniele Manfredini, Cláudia Tavares-Silva, Leandro Costa, Ronir Raggio Luiz, Saul Paiva, Júnia Maria Serra-Negra, Andréa Fonseca-Gonçalves, Lucianne Cople Maia
Sleep bruxism (SB) in children has been associated with several sleep characteristics, which may alter their sleep pattern. This change affects the internal biological clock and consequently the chronotype profile. The aim of this study was to evaluate the existence of an association between possible SB in children with specific chronotype profiles and sleep characteristics. The study included 207 parents/guardians of children aged between 3 and 12 years who were waiting for their children's dental treatment at the Pediatric Dentistry Clinic of the Federal University of Rio de Janeiro, Brazil...
January 24, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29357698/chronotype-is-associated-with-psychological-well-being-depending-on-the-composition-of-the-study-sample
#13
Annika Dimitrov, Ilya M Veer, Julia Kleeblatt, Florian Seyfarth, Till Roenneberg, Marcus Ising, Manfred Uhr, Martin E Keck, Achim Kramer, Maximilian Berger, Lara von Koch, Henrik Walter, Mazda Adli
Past studies examining the effect of chronotype and social jetlag on psychological well-being have been inconsistent so far. Here, we recruited participants from the general population and enquired about their natural sleeping behavior, sleep quality, depressive symptoms, and perceived stress. Partial correlations were computed between sleep variables and indicators of psychological well-being, controlling for age and sex. Less sleep during work days was found a good indicator for impairments in psychological well-being...
January 1, 2018: Journal of Health Psychology
https://www.readbyqxmd.com/read/29340848/validation-of-the-korean-munich-chronotype-questionnaire
#14
Sooyeon Suh, Soo Hyun Kim, Hyera Ryu, Su Jung Choi, Eun Yeon Joo
PURPOSE: The Munich Chronotype Questionnaire (MCTQ) assesses actual sleep-wake timing and has advantages compared to prior chronotype questionnaires in that it differentiates sleep-wake patterns between work days and free days and uses corrected mid-sleep time on free days after correcting for accumulated sleep debt over the week to categorize chronotype. The current study, we validated the Korean version of the MCTQ. METHODS: In this study, 310 participants (mean age = 27...
January 16, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29339309/late-chronotype-is-associated-with-enhanced-amygdala-reactivity-and-reduced-fronto-limbic-functional-connectivity-to-fearful-versus-happy-facial-expressions
#15
Charlotte Mary Horne, Ray Norbury
Increasing evidence suggests late chronotype individuals are at increased risk of developing depression. However, the underlying neural mechanisms that confer risk are not fully understood. Here, fifty healthy, right-handed individuals without a current or previous diagnosis of depression, family history of depression or sleep disorder underwent functional magnetic resonance imaging (FMRI). Participants completed an implicit emotion processing task (gender discrimination) including happy and fearful facial expressions...
May 1, 2018: NeuroImage
https://www.readbyqxmd.com/read/29329461/high-heritability-of-adolescent-sleep-wake-behavior-on-free-but-not-school-days-a-long-term-twin-study
#16
Andrea P Inderkum, Leila Tarokh
Adolescence development is characterized by significant changes in sleep biology. Despite an overall decline in sleep duration and a delay in bedtime, significant interindividual variation in sleep has been reported. The aim of the current study was to examine genetic and environmental influences on sleep in adolescence using long-term (6 month) actigraphy measurements, differentiating between school and free days. Sixteen monozygotic (n = 32) and 10 dizygotic (n = 20) twin pairs (mean age 12.8 ± 1.0 years; 25 females) participated in the study...
March 1, 2018: Sleep
https://www.readbyqxmd.com/read/29283283/epidemiology-of-objectively-measured-bedtime-and-chronotype-in-us-adolescents-and-adults-nhanes-2003-2006
#17
Jacek K Urbanek, Adam P Spira, Junrui Di, Andrew Leroux, Ciprian Crainiceanu, Vadim Zipunnikov
BACKGROUND: We propose a method for estimating the timing of in-bed intervals using objective data in a large representative US sample, and quantify the association between these intervals and age, sex, and day of the week. METHODS: The study included 11,951 participants 6 years and older from the National Health and Nutrition Examination Survey (NHANES) 2003-2006, who wore accelerometers to measure physical activity for seven consecutive days. Participants were instructed to remove the device just before the nighttime sleep period and put it back on immediately after...
March 2018: Chronobiology International
https://www.readbyqxmd.com/read/29276481/is-8-30-a-m-still-too-early-to-start-school-a-10-00-a-m-school-start-time-improves-health-and-performance-of-students-aged-13-16
#18
Paul Kelley, Steven W Lockley, Jonathan Kelley, Mariah D R Evans
While many studies have shown the benefits of later school starts, including better student attendance, higher test scores, and improved sleep duration, few have used starting times later than 9:00 a.m. Here we report on the implementation and impact of a 10 a.m. school start time for 13 to 16-year-old students. A 4-year observational study using a before-after-before (A-B-A) design was carried out in an English state-funded high school. School start times were changed from 8:50 a.m. in study year 0, to 10 a...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29239697/who-is-sleepier-on-the-night-shift-the-influence-of-bio-psycho-social-factors-on-subjective-sleepiness-of-female-nurses-during-the-night-shift
#19
Nataly Zion, Anat Drach-Zahavy, Tamar Shochat
Sleepiness is a common complaint during the night shift and may impair performance. The current study aims to identify bio-psycho-social factors associated with subjective sleepiness during the night shift. Ninety-two female nurses working rotating shifts completed a sociodemographic questionnaire, the Munich ChronoType Questionaire for shift workers, the Pittsburg Sleep Quality Index, and the Pre-sleep Arousal Scale. Subjective sleepiness was measured hourly during two night shifts using the Karolinska Sleepiness Scale, and activity monitors assessed sleep duration 24-h before each shift...
December 23, 2017: Ergonomics
https://www.readbyqxmd.com/read/29237053/beyond-sleep-duration-bidirectional-associations-between-chronotype-social-jetlag-and-drinking-behaviors-in-a-longitudinal-sample-of-us-high-school-students
#20
Denise L Haynie, Daniel Lewin, Jeremy W Luk, Leah M Lipsky, Fearghal O'Brien, Ronald J Iannotti, Danping Liu, Bruce G Simons-Morton
Health Behavior in School-Aged Children: NEXT Longitudinal Study 2009-2013, https://clinicaltrials.gov/ct2/show/NCT01031160?term=Simons-Morton&rank=3, NCT01031160.
December 9, 2017: Sleep
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