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Chronotype

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https://www.readbyqxmd.com/read/29778920/eveningness-chronotype-insomnia-symptoms-and-emotional-and-behavioural-problems-in-adolescents
#1
Shirley Xin Li, Ngan Yin Chan, Mandy Wai Man Yu, Siu Ping Lam, Jihui Zhang, Joey Wing Yan Chan, Albert Martin Li, Yun Kwok Wing
OBJECTIVE: Eveningness tendency and insomnia are common in adolescents, but whether they have an independent or synergistic effect on the risk of psychopathology have remained undefined. The present study aimed to examine eveningness chronotype and insomnia symptoms in relation to mental health and emotional and behavioural problems in a community-based adolescent population. METHODS: A total of 4948 adolescents (weighted mean age: 14.5 ± 1.8 years, weighted percentage of females: 48...
April 17, 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29764219/morningness-eveningness-preferences-learning-approach-and-academic-achievement-of-undergraduate-medical-students
#2
Nimra Akram, Naheed Khan, Mehreen Ameen, Shahmeera Mahmood, Komal Shamim, Marium Amin, Qurrat Ul Ain Rana
Several studies have focused on determining the effect of chronotype and learning approach on academic achievement separately indicating that morning types have an academic advantage over the evening types and so have the deep learners over the surface learners. But, surprisingly none have assessed the possible relationship between chronotype and learning approach. So, the current study aimed to evaluate this association and their individual influence on academic performance as indicated by the Cumulative Grade Point Average (CGPA) as well as the effect of their interaction on academic performance...
May 15, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29764217/chronotype-and-depressive-symptoms-in-students-an-investigation-of-possible-mechanisms
#3
Julia F Van den Berg, Liia Kivelä, Niki Antypa
Individuals with an evening chronotype are at increased risk of experiencing emotional problems, including depressive symptoms. However, the mechanisms underlying these associations remain unclear. The present study aimed to determine whether poor sleep quality, substance use and cognitive emotion regulation difficulties - which have been implicated in the etiology of depression - mediate the relationship between chronotype and depressive symptoms in a student sample, which was assessed cross-sectionally and after 1 year...
May 15, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29764214/chronotype-influences-response-to-antidepressant-chronotherapeutics-in-bipolar-patients
#4
Sara Dallaspezia, Masahiro Suzuki, Locatelli Clara, Cristina Colombo, Francesco Benedetti
Patient diurnal mood fluctuation, sleep characteristics and factors affecting sleep homeostasis predict antidepressant response to the combination of total sleep deprivation and light therapy (TSD + LT). In order to study if chronotype could influence response to TSD+LT, we considered 194 bipolar depressed patients. Severity of depression was rated with Hamilton Depression Rating Scale; perceived mood levels were assessed by a self-administered 10-cm visual analogue scale and chronotype was assessed using the Mornigness-Eveningness Questionnaire...
May 15, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29755724/assessment-of-thedress-with-traditional-color-vision-tests-perception-differences-are-associated-with-blueness
#5
Claudia Feitosa-Santana, Margaret Lutze, Pablo A Barrionuevo, Dingcai Cao
Based on known color vision theories, there is no complete explanation for the perceptual dichotomy of #TheDress in which most people see either white-and-gold (WG) or blue-and-black (BK). We determined whether some standard color vision tests (i.e., color naming, color matching, anomaloscope settings, unique white settings, and color preferences), as well as chronotypes, could provide information on the color perceptions of #TheDress. Fifty-two young observers were tested. Fifteen of the observers (29%) reported the colors as BK, 21 (40%) as WG, and 16 (31%) reported a different combination of colors...
March 2018: I-Perception
https://www.readbyqxmd.com/read/29750548/predictors-of-response-to-combined-wake-and-light-therapy-in-treatment-resistant-inpatients-with-depression
#6
Mette Kragh, Erik Roj Larsen, Klaus Martiny, Dorthe Norden Møller, Camilla Schultz Wihlborg, Tove Lindhardt, Poul Videbech
There is growing evidence for combined chronotherapeutic interventions as adjunctive treatments for major depression. However, as the treatments can be demanding, we need to identify predictors of response. This study aimed to describe predictors of response, remission and deterioration in the short-term phase, as well as predictors of long-term response. The predictors investigated were gender, type of depression, severity of depression, treatment resistance, quetiapine use, general self-efficacy, educational level and positive diurnal variation...
May 11, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29737879/associations-between-chronotype-sleep-disturbances-and-seasonality-with-fatigue-and-inflammatory-bowel-disease-symptoms
#7
Adrian A Chrobak, Jarosław Nowakowski, Małgorzata Zwolińska-Wcisło, Dorota Cibor, Magdalena Przybylska-Feluś, Katarzyna Ochyra, Monika Rzeźnik, Alicja Dudek, Aleksandra Arciszewska, Marcin Siwek, Dominika Dudek
Growing number of studies suggests link between circadian rhythms and inflammatory bowel diseases (IBD) manifestation. We hypothesize that: 1) IBD are associated with increased eveningness and sleep disturbances; 2) eveningness and sleep disturbances are related to more severe IBD symptoms. In total, 129 participants were enrolled to this study, divided into three groups: 34 Crohn's disease (CD) patients, 38 ulcerative colitis (UC) patients and 57 healthy controls (HC) group. They all fulfilled a questionnaire, consisting of the Composite Scale of Morningness (CSM), Seasonal Pattern Assessment Questionnaire (SPAQ), Pittsburgh Sleep Quality Index, Inflammatory Bowel Disease Questionnaire (IBDQ) and Multidimensional Fatigue Inventory (MFI)...
May 8, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29702432/altered-resting-state-connectivity-within-default-mode-network-associated-with-late-chronotype
#8
Charlotte Mary Horne, Ray Norbury
Current evidence suggests late chronotype individuals have an increased risk of developing depression. However, the underlying neural mechanisms of this association are not fully understood. Forty-six healthy, right-handed individuals free of current or previous diagnosis of depression, family history of depression or sleep disorder underwent resting-state functional Magnetic Resonance Imaging (rsFMRI). Using an Independent Component Analysis (ICA) approach, the Default Mode Network (DMN) was identified based on a well validated template...
April 20, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29688068/impairment-of-sleep-quality-and-quality-of-life-in-bimodal-chronotype-individuals
#9
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/29687979/evaluating-the-association-between-artificial-light-at-night-exposure-and-breast-and-prostate-cancer-risk-in-spain-mcc-spain-study
#10
Ariadna Garcia-Saenz, Alejandro Sánchez de Miguel, Ana Espinosa, Antonia Valentin, Núria Aragonés, Javier Llorca, Pilar Amiano, Vicente Martín Sánchez, Marcela Guevara, Rocío Capelo, Adonina Tardón, Rosana Peiró-Perez, José Juan Jiménez-Moleón, Aina Roca-Barceló, Beatriz Pérez-Gómez, Trinidad Dierssen-Sotos, Tania Fernández-Villa, Conchi Moreno-Iribas, Victor Moreno, Javier García-Pérez, Gemma Castaño-Vinyals, Marina Pollán, Martin Aubé, Manolis Kogevinas
BACKGROUND: Night shift work, exposure to light at night (ALAN) and circadian disruption may increase the risk of hormone-dependent cancers. OBJECTIVES: We evaluated the association of exposure to ALAN during sleeping time with breast and prostate cancer in a population based multicase-control study (MCC-Spain), among subjects who had never worked at night. We evaluated chronotype, a characteristic that may relate to adaptation to light at night. METHODS: We enrolled 1,219 breast cancer cases, 1,385 female controls, 623 prostate cancer cases, and 879 male controls from 11 Spanish regions in 2008-2013...
April 23, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29682839/investigating-genetic-correlations-and-causal-effects-between-caffeine-consumption-and-sleep-behaviours
#11
Jorien L Treur, Mark Gibson, Amy E Taylor, Peter J Rogers, Marcus R Munafò
Observationally, higher caffeine consumption is associated with poorer sleep and insomnia. We investigated whether these associations are a result of shared genetic risk factors and/or (possibly bidirectional) causal effects. Summary-level data were available from genome-wide association studies on caffeine intake (n = 91 462), plasma caffeine and caffeine metabolic rate (n = 9876), sleep duration and chronotype (being a "morning" versus an "evening" person) (n = 128 266), and insomnia complaints (n = 113 006)...
April 22, 2018: Journal of Sleep Research
https://www.readbyqxmd.com/read/29670559/similarity-in-chronotype-and-preferred-time-for-sex-and-its-role-in-relationship-quality-and-sexual-satisfaction
#12
Paulina Jocz, Maciej Stolarski, Konrad S Jankowski
Recently, the issue of diurnal preferences has been increasingly studied within the context of romantic relationships and sexual functioning. In the present paper we apply a dyadic design to investigate the role of romantic partners' diurnal preferences in determining a variety of relationship outcomes. A sample of 91 heterosexual couples completed a set of questionnaires measuring relationship satisfaction, sexual satisfaction, and morningness-eveningness, and answered questions regarding their actual and preferred time for sexual activity...
2018: Frontiers in Psychology
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
#13
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/29657561/habitual-sleep-and-human-plasma-metabolomics
#14
Qian Xiao, Andriy Derkach, Steven C Moore, Wei Zheng, Xiao-Ou Shu, Fangyi Gu, Neil E Caporaso, Joshua N Sampson, Charles E Matthews
Introduction: Sleep plays an important role in cardiometabolic health. The sleep-wake cycle is partially driven by the endogenous circadian clock, which governs a range of metabolic pathways. The association between sleep and cardiometabolic health may be mediated by alterations of the human metabolome. Objectives: To better understand the biological mechanism underlying the association between sleep and health, we examined human plasma metabolites in relation to sleep duration and sleep timing...
May 2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/29642757/associations-between-chronotype-morbidity-and-mortality-in-the-uk-biobank-cohort
#15
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
#16
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/29621410/exploring-the-effect-of-chronotype-on-hippocampal-volume-and-shape-a-combined-approach
#17
Charlotte Mary Horne, Ray Norbury
Current evidence suggests that acute depression is associated with reduced total hippocampal volume and regional atrophy. Here, using structural magnetic resonance imaging, we assayed linear effects of chronotype on total hippocampal volume and morphology. Later chronotype was associated with localised atrophy in the subiculum region of the right hippocampus in the absence of changes in total volume. The hippocampus forms a key node in a network of brain regions implicated in emotional regulation and alterations in the structure of this region may underpin, in part, the increased vulnerability for depression in late chronotype individuals...
April 5, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29617980/physical-activity-is-associated-with-higher-sleep-efficiency-in-the-general-population-the-colaus-study
#18
Cédric Gubelmann, Raphael Heinzer, José Haba-Rubio, Peter Vollenweider, Pedro Marques-Vidal
Study objectives: To evaluate the association of objective physical activity (PA) and sedentary behaviour (SB) with sleep duration and quality. Methods: Cross-sectional study including 2649 adults (53.5% women, 45-86 years) from the general population. Proportions of time spent in PA and SB were measured using 14-day accelerometry. Low PA and high SB status were defined as the lowest and highest tertile of each behaviour. 'Inactive', 'Weekend warrior' and 'Regularly active' weekly patterns were also defined...
March 30, 2018: Sleep
https://www.readbyqxmd.com/read/29609867/circadian-health-differs-between-boys-and-girls-as-assessed-by-non-invasive-tools-in-school-aged-children
#19
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/29599506/3-4-million-real-world-learning-management-system-logins-reveal-the-majority-of-students-experience-social-jet-lag-correlated-with-decreased-performance
#20
Benjamin L Smarr, Aaron E Schirmer
Misalignments between endogenous circadian rhythms and the built environment (i.e., social jet lag, SJL) result in learning and attention deficits. Currently, there is no way to assess the impact of SJL on learning outcomes of large populations as a response to schedule choices, let alone to assess which individuals are most negatively impacted by these choices. We analyzed two years of learning management system login events for 14,894 Northeastern Illinois University (NEIU) students to investigate the capacity of such systems as tools for mapping the impact of SJL over large populations while maintaining the ability to generate insights about individuals...
March 29, 2018: Scientific Reports
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