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https://www.readbyqxmd.com/read/28426387/characterization-of-bimodal-chronotype-and-its-association-with-sleep-a-population-based-study
#1
Priscila Farias Tempaku, Juliana Ramirez Arruda, Diego Robles Mazzotti, Bruno S B Gonçalves, Mário Pedrazzoli, Lia Bittencourt, Sergio Tufik
The circadian system coordinates internal events in a daily schedule to make sure that the body systems are synchronized to environmental time and internal cues. One important behavioral aspect of the circadian system is the chronotype. It is usually assessed through subjective questionnaires, being the Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ) one of the most used. It classifies individuals into three major categories: morning, evening, and intermediate types. Recently, it has been hypothesized the existence of a fourth chronotype, the bimodal type, through an algorithm derived from the MEQ responses...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28415855/predicting-jet-lag-in-long-haul-cabin-crew-the-role-of-illness-cognitions-and-behaviour
#2
Cristina Ruscitto, Jane Ogden
OBJECTIVE: Established risk factors for jet lag are mostly physiological including circadian preference, age, gender, the number of flight zones crossed and to some extent direction of travel. Some research has also highlighted a role for psychosocial factors including sleep, diet and 'circadian' health behaviours and illness cognitions although this remains relatively untested. The aim of this study was to evaluate the role of sleep, diet and illness cognitions in predicting perceived jet lag amongst long-haul crew...
April 18, 2017: Psychology & Health
https://www.readbyqxmd.com/read/28409690/salivary-cortisol-concentration-after-high-intensity-interval-exercise-time-of-day-and-chronotype-effect
#3
Matteo Bonato, Antonio La Torre, Marina Saresella, Ivana Marventano, Giampiero Merati, Jacopo Antonino Vitale
Due to personal and working necessities, the time for exercise is often short, and scheduled early in the morning or late in the afternoon. Cortisol plays a central role in the physiological and behavioral response to a physical challenge and can be considered as an index of exercise stress. Therefore, the aim of this study was to evaluate the influence of the circadian phenotype classification on salivary cortisol concentration in relation to an acute session of high-intensity interval exercise (HIIE) performed at different times of the day...
April 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28378787/from-lark-to-owl-developmental-changes-in-morningness-eveningness-from-new-borns-to-early-adulthood
#4
Christoph Randler, Corina Faßl, Nadine Kalb
Morningness-eveningness or chronotype changes significantly throughout the life span. This has been reported for the transition during adolescence in some studies, and to a lesser extent in early adulthood. Primary and pre-school children have been under investigation in fewer studies. This is the first comprehensive study covering the age range from very young children until early adulthood (0-30 years) based on the same measurement instrument. Here, we show that the turn towards eveningness starts at an early age in German children...
April 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28366340/excessive-daytime-sleepiness-in-adults-with-possible-attention-deficit-hyperactivity-disorder-adhd-a-web-based-cross-sectional-study
#5
Wakako Ito, Yoko Komada, Isa Okajima, Yuichi Inoue
OBJECTIVES: Arousal dysregulation has been speculated to be involved in the pathological mechanism of attention deficit/hyperactivity disorder (ADHD). However, there has been no epidemiological study assessing the real condition of excessive daytime sleepiness (EDS) in adults with ADHD. This study investigated the prevalence of EDS and the relationship between sleepiness and ADHD symptoms in adults with possible ADHD. METHODS: An observational, cross-sectional, web-based study was performed...
April 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28343215/a-study-of-biological-rhythm-disturbances-in-polish-remitted-bipolar-patients-using-the-brian-csm-and-swpaq-scales
#6
Ewa Dopierala, Adrian Chrobak, Flavio Kapczinski, Michał Michalak, Anna Tereszko, Ewa Ferensztajn-Rochowiak, Dominika Dudek, Jan Jaracz, Marcin Siwek, Janusz K Rybakowski
BACKGROUND/AIMS: The Biological Rhythms Interview of Assessment in Neuropsychiatry (BRIAN) is a novel tool allowing for a complex assessment of biological rhythms. We compared patients with bipolar disorder (BD) and healthy control subjects (HC) using the Polish version of the BRIAN scale. METHOD: Fifty-four remitted BD patients (17 males and 37 females aged 52 ± 13 years) and 54 healthy control subjects (25 males and 29 females aged 42 ± 14 years) were studied...
2016: Neuropsychobiology
https://www.readbyqxmd.com/read/28329091/association-between-sleep-timing-obesity-diabetes-the-hispanic-community-health-study-study-of-latinos-hchs-sol-cohort-study-sleep-timing-obesity-and-diabetes
#7
Kristen L Knutson, Donghong Wu, Sanjay R Patel, Jose S Loredo, Susan Redline, Jianwen Cai, Linda C Gallo, Yasmin Mossavar-Rahmani, Alberto R Ramos, Yanping Teng, Martha L Daviglus, Phyllis C Zee
Study Objectives: Recent studies implicate inadequate sleep duration and quality in metabolic disease. Fewer studies have examined the timing of sleep, which may be important because of its potential impact on circadian rhythms of metabolic function. We examined the association between sleep timing and metabolic risk among Hispanic/Latino adults. Methods.: Cross-sectional data from community-based study of 13,429 participants aged 18-74 years. People taking diabetes medications were excluded...
January 28, 2017: Sleep
https://www.readbyqxmd.com/read/28282237/associations-of-common-noncommunicable-medical-conditions-and-chronic-diseases-with-chronotype-in-a-population-based-health-examination-study
#8
Syaron Basnet, Ilona Merikanto, Tuuli Lahti, Satu Männistö, Tiina Laatikainen, Erkki Vartiainen, Timo Partonen
Chronotype is an emerging predictor of health and longevity, and understanding its influence on chronic diseases is important for constructing conceptual models of long-term pathways to health. We assessed the associations of chronotype with health status in the general Finnish adult population. Our population-based data were derived from the National FINRISK 2012 study and consisted of 4414 participants, aged 25-74 years, living in Finland. As part of their health examination, participants were asked about their circadian preference to the daily activities (morningness-eveningness) and a diagnosis or treatment for a set of common noncommunicable medical conditions and chronic diseases during the past 12 months...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28276850/associations-between-period-3-gene-polymorphisms-and-sleep-chronotype-related-variables-in-patients-with-late-life-insomnia
#9
Hader A Mansour, Joel Wood, Kodavali V Chowdari, Divya Tumuluru, Mikhil Bamne, Timothy H Monk, Martica H Hall, Daniel J Buysse, Vishwajit L Nimgaonkar
A variable number tandem repeat polymorphism (VNTR) in the period 3 (PER3) gene has been associated with heritable sleep and circadian variables, including self-rated chronotypes, polysomnographic (PSG) variables, insomnia and circadian sleep-wake disorders. This report describes novel molecular and clinical analyses of PER3 VNTR polymorphisms to better define their functional consequences. As the PER3 VNTR is located in the exonic (protein coding) region of PER3, we initially investigated whether both alleles (variants) are transcribed into messenger RNA in human fibroblasts...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28251931/sleep-characteristics-modify-the-association-of-genetic-predisposition-with-obesity-and-anthropometric-measurements-in-119-679-uk-biobank-participants
#10
Carlos Celis-Morales, Donald M Lyall, Yibing Guo, Lewis Steell, Daniel Llanas, Joey Ward, Daniel F Mackay, Stephany M Biello, Mark Es Bailey, Jill P Pell, Jason Mr Gill
Background: Obesity is a multifactorial condition influenced by genetics, lifestyle, and environment.Objective: We investigated whether the association of a validated genetic profile risk score for obesity (GPRS-obesity) with body mass index (BMI) and waist circumference (WC) was modified by sleep characteristics.Design: This study included cross-sectional data from 119,859 white European adults, aged 37-73 y, participating in the UK Biobank. Interactions of GPRS-obesity and sleep characteristics (sleep duration, chronotype, day napping, and shift work) with their effects on BMI and WC were investigated...
March 1, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28229553/chronotype-differences-in-timing-of-energy-and-macronutrient-intakes-a-population-based-study-in-adults
#11
Mirkka Maukonen, Noora Kanerva, Timo Partonen, Erkki Kronholm, Heli Tapanainen, Jukka Kontto, Satu Männistö
OBJECTIVE: To examine the association between chronotype and timing of energy and macronutrient intakes in adults. METHODS: The study sample included 1,854 participants from the National FINRISK 2007 and FINDIET 2007 studies, aged 25 to 74 years. Diet was assessed with 48-hour dietary recalls. Chronotype was assessed with a shortened version of Horne and Östberg's Morningness-eveningness Questionnaire. Associations between chronotype and intakes of energy and macronutrients in the morning (by 10 am) and in the evening (after 8 pm) were analyzed with linear regression and ANOVA followed by Bonferroni post hoc test...
March 2017: Obesity
https://www.readbyqxmd.com/read/28215256/the-association-between-chronotype-and-sleep-problems-in-preschool-children
#12
Nur K Jafar, Elaine K H Tham, Derric Z H Eng, Daniel Y T Goh, Oon-Hoe Teoh, Yung S Lee, Lynette Pei-Chi Shek, Fabian Yap, Yap Seng Chong, Michael J Meaney, Joshua J Gooley, Birit F P Broekman
OBJECTIVE: Adolescents and adults who are evening-types exhibit shorter sleep duration and more sleep problems than individuals with an earlier chronotype. We hypothesized that already at a preschool age, evening-types would exhibit more sleep problems relative to children who are morning or intermediate chronotypes. The aim of this study was to examine the association between chronotype and sleep problems among preschool children. METHODS: We studied a subset of typically-developing 4...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28202701/chronobiology-differs-between-men-and-women-with-cluster-headache-clinical-phenotype-does-not
#13
Nunu Lund, Mads Barloese, Anja Petersen, Bryan Haddock, Rigmor Jensen
OBJECTIVE: To describe differences between the sexes in the phenotype of cluster headache (CH) in a large, well-characterized clinical CH population. METHODS: Patients from the Danish CH survey aged 18-65 years, diagnosed with CH according to International Classification of Headache Disorders, second edition, completed questionnaires and structured interviews. RESULTS: A total of 351 patients with CH participated, with a male:female ratio of 2:1...
March 14, 2017: Neurology
https://www.readbyqxmd.com/read/28189081/relationship-between-chronotype-and-temperament-character-among-university-students
#14
Kounseok Lee, Hye-Kyung Lee, Kyungun Jhung, Jin Young Park
Chronotype is largely classified as being morning or evening types according to preference for daily activity and the preferred bedtime. This study examined the relationship between chronotype and temperament/character dimensions among university students. A total of 2857 participants completed the 140-item Temperament and Character Inventory-Revised Short version (TCI-RS) from a 5-score scale as well as the 13-item composite scale for morningness-eveningness (CSM). In this study, we classified chronotype as "morning," "neither," or "evening" types according to CSM scores and compared the scores in terms of 4 temperament dimensions and 3 character dimensions...
May 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28128995/later-chronotype-is-associated-with-higher-hemoglobin-a1c-in-prediabetes-patients
#15
Thunyarat Anothaisintawee, Dumrongrat Lertrattananon, Sangsulee Thamakaison, Kristen L Knutson, Ammarin Thakkinstian, Sirimon Reutrakul
The circadian system is known to play a role in glucose metabolism. Chronotype reflects the interindividual variability in the phase of entrainment. Those with later chronotype typically prefer later times in the day for different activities such as sleep or meals. Later chronotype has been shown to be associated with metabolic syndrome, increased diabetes risk and poorer glycemic control in type 2 diabetes patients. In addition, "social jetlag", a form of circadian misalignment due to a mismatch between social rhythms and the circadian clock, has been shown to be associated with insulin resistance...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28107042/association-between-depressive-symptoms-and-morningness-eveningness-sleep-duration-and-rotating-shift-work-in-japanese-nurses
#16
Fumiharu Togo, Takahiro Yoshizaki, Taiki Komatsu
Higher depressive symptoms have been reported in rotating shift workers compared with day workers. Depressive symptoms in adults who do not engage in night work have also been shown to be associated with chronotype and sleep duration. This study examines associations between depressive symptoms, morningness-eveningness (i.e. the degree to which people prefer to be active in the morning or the evening), sleep duration and rotating shift work. Japanese nurses (1252 day workers and 1780 rotating shift workers, aged 20-59) were studied using a self-administered questionnaire...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28076650/chronotype-and-anxiety-are-associated-in-patients-with-chronic-primary-insomnia
#17
Giselle S Passos, Marcos G Santana, Dalva Poyares, Carolina V D'Aurea, Alexandre A Teixeira, Sergio Tufik, Marco T de Mello
Objective: To assess the interaction of chronotype with anxiety in patients with chronic primary insomnia. Methods: Sixty-four patients (50 women) with mean age 43.9±8.1 years were investigated with the Horne and Östberg Morningness-Eveningness Questionnaire (MEQ) and State-Trait Anxiety Inventory (STAI). Results: Significant negative correlations of chronotype-MEQ score with STAI state-anxiety (r = -0.40, p < 0.05), STAI trait-anxiety (r = -0...
January 9, 2017: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/28055288/eveningness-as-a-risk-for-behavioral-problems-in-late-adolescence
#18
Ilona Merikanto, Anu-Katriina Pesonen, Liisa Kuula, Jari Lahti, Kati Heinonen, Eero Kajantie, Katri Räikkönen
Circadian preference toward eveningness has been associated with increased risk for mental health problems both in early adolescence and in adulthood. However, in late adolescence, when circadian rhythm naturally shifts to later, its significance for mental health is not clear. Accordingly, we studied how circadian rhythm estimated both by self-reported chronotype and by actigraph-defined midpoint of sleep was associated with self-reported psychiatric problems based on Youth Self Report (YSR). The study builds on a community cohort born in 1998, Helsinki, Finland...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28008932/timing-and-quality-of-sleep-in-a-rural-brazilian-family-based-cohort-the-baependi-heart-study
#19
F Beijamini, K L Knutson, G Lorenzi-Filho, K J Egan, T P Taporoski, L K G De Paula, A B Negrão, A R V R Horimoto, N E Duarte, H Vallada, J E Krieger, M Pedrazzoli, A C Pereira, M von Schantz
Sleep is modulated by several factors, including sex, age, and chronotype. It has been hypothesised that contemporary urban populations are under pressure towards shorter sleep duration and poorer sleep quality. Baependi is a small town in Brazil that provides a window of opportunity to study the influence of sleep patterns in a highly admixed rural population with a conservative lifestyle. We evaluated sleep characteristics, excessive daytime sleepiness, and chronotype using the Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale and Morningness-Eveningness Questionnaire questionnaires, respectively...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27957554/morningness-eveningness-in-a-large-sample-of-german-adolescents-and-adults
#20
Christoph Randler, Katharina Freyth-Weber, Arash Rahafar, Andrea Florez Jurado, Jan Ole Kriegs
People differ in their sleep-wake behavior. This individual difference is conceptualized in different aspects, such as wake up times, bed times, times of peak performance, as well as in morning affect. A total of 14,987 visitors of an exhibition in the LWL State Museum of Natural History, Münster (Germany), did the survey on chronotype and gave their consent that these data can be used for a scientific study. Age groups were coded into 5-year bins. Mean age (mean ± SD) was 28.2 ± 17.5 years. There were 8075 females (54%) and 6912 males in the sample...
November 2016: Heliyon
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