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Social jetlag

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https://www.readbyqxmd.com/read/29688068/impairment-of-sleep-quality-and-quality-of-life-in-bimodal-chronotype-individuals
#1
João Guilherme Fiorani Borgio, Cesar Minoru Toita Koga, Bruno Matynhak, Fernando Mazzilli Louzada
There is still insufficient data about the characteristics and clinical significance of the bimodal chronotype. We evaluated more than 1000 students with Morningness-Eveningness Questionnaire, Munich Chronotype Questionnaire (MCTQ), Pittsburgh Sleep Quality Index and 36-item Short Form Health Survey. Twelve percent of the sample was bimodal and they showed similar results to intermediate chronotype in MCTQ-chronotype and social jetlag, both different from morning and evening chronotypes. However, their quality of life and sleep quality were similar to evening types, both different from morning and intermediate types...
April 24, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29658812/late-chronotype-and-high-social-jetlag-are-associated-with-burnout-in-evening-shift-workers-assessment-using-the-chinese-version-mctq-shift
#2
Wan-Ju Cheng, Liang-Wen Hang
Chronotypes are associated with shift work tolerance and sleep in shift workers, and sleep mediates the impact of shift work on mental health. However, the role of chronotype in the association between shift work and mental health has not been clarified. In this study, we aimed to examine the association between chronotype and burnout in shift workers, using the validated Munich ChronoType Questionnaire for shift workers (MCTQshift ). A total of 288 shift workers with irregular shift frequencies were recruited and completed the Chinese-version MCTQshift and the Morningness-Eveningness Questionnaire (MEQ)...
April 16, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29420828/time-to-rethink-sleep-quality-psqi-scores-reflect-sleep-quality-on-workdays
#3
Luísa K Pilz, Lena Katharina Keller, David Lenssen, Till Roenneberg
The Pittsburgh Sleep Quality Index (PSQI) is the most common measure of sleep quality. Its questions refer to "usual" sleep habits during the last month. Considering how different sleep-wake behavior can be between work- and work-free days, we hypothesized that sleep quality should show similar differences.We investigated these potential differences in a cross-sectional online study using the original and two adapted versions of the PSQI that replaced "usual" by explicitly referring to sleep on work- or work-free days...
February 6, 2018: Sleep
https://www.readbyqxmd.com/read/29378772/circadian-rhythms-in-mitochondrial-respiration
#4
REVIEW
Paul de Goede, Jakob Wefers, Eline Constance Brombacher, Patrick Schrauwen, Andries Kalsbeek
Many physiological processes are regulated with a 24-h periodicity to anticipate the environmental changes of daytime to nighttime and vice versa. These 24-h regulations, commonly termed circadian rhythms, among others control the sleep-wake cycle, locomotor activity and preparation for food availability during the active phase (daytime for humans and nighttime for nocturnal animals). Disturbing circadian rhythms at the organ or whole-body level by social jetlag or shift work, increases the risk to develop chronic metabolic diseases such as type 2 diabetes mellitus...
April 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29357698/chronotype-is-associated-with-psychological-well-being-depending-on-the-composition-of-the-study-sample
#5
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/29298086/sleep-and-adiposity-in-preadolescent-children-the-importance-of-social-jetlag
#6
Lee Stoner, Nicholas Castro, Leigh Signal, Paula Skidmore, James Faulkner, Sally Lark, Michelle A Williams, Diane Muller, Harriet Harrex
BACKGROUND: While short and poor quality sleep have been associated with childhood obesity, no known studies have examined social jetlag. Social jetlag is the discrepancy between an individual's circadian clock and social rhythms, and is measured as the difference in hours between the midpoint of sleep during work/school days and on free (weekend) days. This study investigated the independent associations between sleep duration, sleep disturbances, and social jetlag with adiposity in children...
January 3, 2018: Childhood Obesity
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
#7
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
https://www.readbyqxmd.com/read/29231764/relevance-of-chronotype-for-eating-patterns-in-adolescents
#8
Sarah Roßbach, Tanja Diederichs, Ute Nöthlings, Anette E Buyken, Ute Alexy
During adolescence, a shift from morningness to eveningness occurs, yet school continues to start early in the morning. Hence, adolescents are at risk for social jetlag, i.e. a discrepancy between biological and social timing. It remains to be determined whether chronotype associates with daily and daytime-specific eating patterns during this potentially critical period. Therefore, the aim of the present study was to investigate whether chronotype is decisive for daily eating patterns [total energy intake (TEI, kcal), total macronutrient intake (% of TEI), eating occasion frequency (n/day), meal frequency (n/day), snack frequency (n/day), duration of nightly fasting], or daytime-specific eating patterns [morning (before 11 am) energy intake (% of TEI), morning macronutrient intake (% of morning energy intake), regular breakfast skipping (no morning energy intake at least on 2 of 3 days, yes/no), evening (after 6 pm) energy intake (% of TEI), evening macronutrient intake (% of evening energy intake), regular dinner skipping (no evening energy intake at least on 2 of 3 days, yes/no)] in German adolescents...
December 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29231745/persistence-of-social-jetlag-and-sleep-disruption-in-healthy-young-adults
#9
Daria M McMahon, James B Burch, Michael D Wirth, Shawn D Youngstedt, James W Hardin, Thomas G Hurley, Steven N Blair, Gregory A Hand, Robin P Shook, Clemens Drenowatz, Stephanie Burgess, James R Hebert
Sleep disruption has been associated with increased risks for several major chronic diseases that develop over decades. Differences in sleep/wake timing between work and free days can result in the development of social jetlag (SJL), a chronic misalignment between a person's preferred sleep/wake schedule and sleep/wake timing imposed by his/her work schedule. Only a few studies have examined the persistence of SJL or sleep disruption over time. This prospective investigation examined SJL and sleep characteristics over a 2-year period to evaluate whether SJL or poor sleep were chronic conditions during the study period...
December 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29159867/computing-sleep-deficiency
#10
Thomas C Erren, J Valerie Groß, Philip Lewis
Sleep deficiency is a major public health concern. Since epidemiological studies play an important role in public health evaluations, this theoretical paper pursues answers to the question: 'How can we compute sleep deficiency as informative measures of exposures or doses in observational research?' Starting from the social jetlag concept and based on the chronodisruption rationale, we illustrate and discuss five approaches (one established and four untested, each with unique strengths and limitations) to quantify sleep deficiency by focusing on the timing and duration of sleep...
November 20, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/29111775/social-jetlag-and-depression-status-results-obtained-from-the-netherlands-study-of-depression-and-anxiety
#11
Stefan E Knapen, Rixt F Riemersma-van der Lek, Niki Antypa, Ybe Meesters, Brenda W J H Penninx, Robert A Schoevers
Social jetlag, the misalignment between the internal clock and the socially required timing of activities, is highly prevalent, especially in people with an evening chronotype and is hypothesized to be related to the link between the evening chronotype and major depressive disorder. Although social jetlag has been linked to depressive symptoms in non-clinical samples, it has never been studied in patients with major depressive disorder (MDD). This study is aimed to study social jetlag in patients with major depressive disorder and healthy controls, and to further examine the link between social jetlag and depressive symptomatology...
January 2018: Chronobiology International
https://www.readbyqxmd.com/read/28900189/misalignment-with-the-external-light-environment-drives-metabolic-and-cardiac-dysfunction
#12
Alexander C West, Laura Smith, David W Ray, Andrew S I Loudon, Timothy M Brown, David A Bechtold
Most organisms use internal biological clocks to match behavioural and physiological processes to specific phases of the day-night cycle. Central to this is the synchronisation of internal processes across multiple organ systems. Environmental desynchrony (e.g. shift work) profoundly impacts human health, increasing cardiovascular disease and diabetes risk, yet the underlying mechanisms remain unclear. Here, we characterise the impact of desynchrony between the internal clock and the external light-dark (LD) cycle on mammalian physiology...
September 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28880049/sleep-and-glycemic-control-in-adolescents-with-type-1-diabetes
#13
Julia von Schnurbein, Claudia Boettcher, Stephanie Brandt, Beate Karges, Desiree Dunstheimer, Angela Galler, Christian Denzer, Friederike Denzer, Heike Vollbach, Martin Wabitsch, Till Roenneberg, Celine Vetter
BACKGROUND: Increasing evidence link sleep curtailment and circadian misalignment with adverse metabolic outcome. Adolescents might be most affected, given their late sleep timing and early school and work start times. OBJECTIVE: Our aim was to examine the impact of poor sleeping habits on glycemic control in adolescents with type 1 diabetes. SUBJECTS AND METHODS: This was a non-interventional multicenter study across Germany recruiting pubertally mature adolescents with type 1 diabetes...
February 2018: Pediatric Diabetes
https://www.readbyqxmd.com/read/28878635/alcohol-intake-increases-in-adolescent-c57bl-6j-mice-during-intermittent-cycles-of-phase-delayed-long-light-conditions
#14
Joshua J Gamsby, Abby M Pribish, Korey D Stevanovic, Amara Yunus, Danielle Gulick
Adolescents naturally go to bed and awaken late, but are forced to awaken early for school and work. This leads to "social jetlag", a state of circadian desynchrony (CD), in which internal biological rhythms are out of sync with behavioral rhythms. CD is associated with increased alcohol intake in adults, but has been less well-studied in adolescents. The goal of this study was to model adolescent alcohol intake during similar CD conditions in male C57BL/6J mice. Free access alcohol intake, water intake and wheel-running activity were measured during a normal 12HR photoperiod or during alternating photoperiod (Experiment 1: 12 h light for 4 days followed by 18 h light for 3 days, with dark (activity onset) delayed 9 h during the 18HR photoperiod; Experiment 2: 12 h light for 4 days followed by 6 h light for 3 days, with dark onset delayed 3 h during the 6HR photoperiod)...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28777361/-associations-between-chronotype-road-accidents-and-polymorphisms-in-genes-linked-with-biological-clock-and-dopaminergic-system
#15
A O Taranov, A N Puchkova, P A Slominsky, T V Tupitsyna, V V Dementiyenko, V B Dorokhov
Public transport driving is a highly demanding activity requiring high skills and responsibility. Shift work, problems with regular sleep schedule negatively impact psychomotor reactions, cognitive functions and ability to react appropriately to the changing environment. For professional drivers all these factors may lead to the increased risk of a road accident. Individual differences in chronotype, cognitive and emotional control are partially genetically determined. AIM: Our study aimed to investigate the possible associations between chronotype parameters, traffic accident history and single nucleotide polymorphisms (SNPs) in a number of genes: RORA (rs1159814), CLOCK (rs12649507), PER3 (rs2640909), NPSR1 (rs324981), NPAS2 (rs4851377), DRD3 (rs6280), SLC6A3 (rs6347), DBH (rs1611125)...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28743872/social-jetlag-and-metabolic-control-in-non-communicable-chronic-diseases-a-study-addressing-different-obesity-statuses
#16
Maria Carliana Mota, Catarina Mendes Silva, Laura Cristina Tibiletti Balieiro, Walid Makin Fahmy, Cibele Aparecida Crispim
Social jetlag - a measure of disruption of the circadian system - has been linked to obesity, but its association with metabolic complications in non-communicable chronic diseases (NCCDs) is unknown in the literature. We examined the associations between social jetlag and obesity status and metabolic parameters among individuals with NCCDs. Patients (n = 792) with NCCDs (obesity, systemic arterial hypertension, type 2 diabetes mellitus or dyslipidaemia) attended clinics of the public health service of the city of Uberlândia, Minas Gerais State, Brazil...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28631524/the-association-between-social-jetlag-the-metabolic-syndrome-and-type-2-diabetes-mellitus-in-the-general-population-the-new-hoorn-study
#17
Anitra D M Koopman, Simone P Rauh, Esther van 't Riet, Lenka Groeneveld, Amber A van der Heijden, Petra J Elders, Jacqueline M Dekker, Giel Nijpels, Joline W Beulens, Femke Rutters
Only a few studies have investigated the metabolic consequences of social jetlag. Therefore, we examined the association of social jetlag with the metabolic syndrome and type 2 diabetes mellitus in a population-based cohort. We used cross-sectional data from the New Hoorn Study cohort ( n = 1585, 47% men, age 60.8 ± 6 years). Social jetlag was calculated as the difference in midpoint sleep (in hours) between weekdays and weekend days. Poisson and linear regression models were used to study the associations, and age was regarded as a possible effect modifier...
August 2017: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/28537801/association-of-chronotype-and-social-jetlag-with-human-non-verbal-intelligence
#18
A S Panev, T A Tserne, A S Polugrudov, L A Bakutova, N B Petrova, O V Tatarinova, O N Kolosova, M F Borisenkov
The aim of this study was to evaluate the effects of chronotype and social jetlag (SJL) on intelligence. Subjects were aged 14-25 years (n = 1008). A significant effect of intelligence on academic performance, as measured by the Raven's Standard Progressive Matrices test, was found (F2,917 = 11.75, P < 0.0001, η(2) = 0.03). When SJL was less than 2 hours, the intelligence of people with late chronotype was found to be higher than that of subjects with early and intermediate chronotypes (F2,305 = 3.12, P < 0...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28367676/are-individual-differences-in-sleep-and-circadian-timing-amplified-by-use-of-artificial-light-sources
#19
Krithika Swaminathan, Elizabeth B Klerman, Andrew J K Phillips
Within the human population, there is large interindividual variability in the timing of sleep and circadian rhythms. This variability has been attributed to individual differences in sleep physiology, circadian physiology, and/or light exposure. Recent experimental evidence suggests that the latter is necessary to evoke large interindividual differences in sleep and circadian timing. We used a validated model of human sleep and circadian physiology to test the hypothesis that intrinsic differences in sleep and circadian timing are amplified by self-selected use of artificial light sources...
April 2017: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/28357513/not-later-but-longer-sleep-chronotype-and-light-exposure-in-adolescents-with-remitted-depression-compared-to-healthy-controls
#20
Lena Katharina Keller, Barbara Grünewald, Céline Vetter, Till Roenneberg, Gerd Schulte-Körne
The relationship between sleep and adolescent depression is much discussed, but still not fully understood. One important sleep variable is self-selected sleep timing, which is also referred to as chronotype. Chronotype is mostly regulated by the circadian clock that synchronises the internal time of the body with the external light dark cycle. A late chronotype as well as a misalignment between internal time and external time such as social jetlag has been shown to be associated with depressive symptoms in adults...
October 2017: European Child & Adolescent Psychiatry
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