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Journal of Sleep Research

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https://www.readbyqxmd.com/read/28101894/sleep-quality-and-body-mass-index-a-co-twin-study
#1
Juan J Madrid-Valero, José M Martínez-Selva, Juan R Ordoñana
There is a consistent relationship between body mass index and sleep quality. However, the directionality and possible confounding factors of this relationship are unclear. Our aim is to confirm the association between sleep quality and body mass index, independent of possible genetic confounding, as well as to provide some indirect inferences about the directionality of this association. The co-twin study design was used to analyse the body mass index-sleep relationship in a sample of 2150 twins. We selected two parallel sub-samples of twins discordant for body mass index (n = 430 pairs), or discordant for sleep quality (n = 316 pairs)...
January 19, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093830/age-affects-sleep-microstructure-more-than-sleep-macrostructure
#2
Johanna F A Schwarz, Torbjörn Åkerstedt, Eva Lindberg, Georg Gruber, Håkan Fischer, Jenny Theorell-Haglöw
It is well known that the quantity and quality of physiological sleep changes across age. However, so far the effect of age on sleep microstructure has been mostly addressed in small samples. The current study examines the effect of age on several measures of sleep macro- and microstructure in 211 women (22-71 years old) of the 'Sleep and Health in Women' study for whom ambulatory polysomnography was registered. Older age was associated with significantly lower fast spindle (effect size f(2)  = 0.32) and K-complex density (f(2)  = 0...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093827/trajectories-of-sleep-and-cardiac-sympathetic-activity-indexed-by-pre-ejection-period-in-childhood
#3
Mona El-Sheikh, J Benjamin Hinnant, Lauren E Philbrook
Fragmented and insufficient sleep has been implicated in disrupted autonomic nervous system activity during resting state conditions in typically developing children. Towards explication of these relations over development, the current study tested reciprocal relations between the development of sleep parameters (efficiency, duration, latency) and cardiac sympathetic nervous system (SNS) activity indexed by pre-ejection period (PEP) during waking-resting state conditions throughout middle and late childhood...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093825/three-decades-of-continuous-wrist-activity-recording-analysis-of-sleep-duration
#4
Alexander A Borbély, Thomas Rusterholz, Peter Achermann
Motor activity recording by a wrist-worn device is a common method to monitor the rest-activity cycle. The first author wore an actimeter continuously for more than three decades, starting in 1982 at the age of 43.5 years. Until November 2006 analysis was performed on a 15-min time base, and subsequently on a 2-min time base. The timing of night-time sleep was determined from the cessation and re-occurrence of daytime-level activity. Sleep duration declined from an initial 6.8 to 6 h in 2004. The declining trend was reversed upon retirement, whereas the variance of sleep duration declined throughout the recording period...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28093823/sleep-and-its-associations-with-perceived-and-objective-cognitive-impairment-in-individuals-with-multiple-sclerosis
#5
Abbey J Hughes, Brett A Parmenter, Jodie K Haselkorn, Jesus F Lovera, Dennis Bourdette, Eilis Boudreau, Michelle H Cameron, Aaron P Turner
Problems with sleep and cognitive impairment are common among people with multiple sclerosis (MS). The present study examined the relationship between self-reported sleep and both objective and perceived cognitive impairment in MS. Data were obtained from the baseline assessment of a multi-centre intervention trial (NCT00841321). Participants were 121 individuals with MS. Nearly half (49%) of participants met the criteria for objective cognitive impairment; however, cognitively impaired and unimpaired participants did not differ on any self-reported sleep measures...
January 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28032388/impaired-visual-processing-in-patients-with-insomnia-disorder-revealed-by-a-dissociation-in-visual-search
#6
Enrico Giora, Andrea Galbiati, Sara Marelli, Marco Zucconi, Luigi Ferini-Strambi
Insomnia disorder is associated with both subjective and objective daytime impairments. In particular, cognitive impairments are frequently reported. However, little is known about the effects of this pathology on perceptual processes. In this study we aim at evaluating the effect of insomnia disorder on visual processing by employing a visual search paradigm. Twenty-three patients with insomnia disorder and 20 healthy age- and sex-matched control subjects participated in the study. After a polysomnographic recording night patients performed a visual search task in which they had to respond to the presence/absence of a target (letter T) embedded into a set of distractors (letters Os, Xs or Ls)...
December 29, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019055/quality-of-life-in-patients-with-an-idiopathic-rapid-eye-movement-sleep-behaviour-disorder-in-korea
#7
Keun Tae Kim, Gholam K Motamedi, Yong Won Cho
There have been few quality of life studies in patients with idiopathic rapid eye movement sleep behaviour disorder. We compared the quality of life in idiopathic rapid eye movement sleep behaviour disorder patients to healthy controls, patients with hypertension, type 2 diabetes mellitus without complication and idiopathic restless legs syndrome. Sixty patients with idiopathic rapid eye movement sleep behaviour disorder (24 female; mean age: 61.43 ± 8.99) were enrolled retrospectively. The diagnosis was established based on sleep history, overnight polysomnography, neurological examination and Mini-Mental State Examination to exclude secondary rapid eye movement sleep behavior disorder...
December 26, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019049/facial-phenotype-in-obstructive-sleep-apnea-hypopnea-syndrome-a-systematic-review-and-meta-analysis
#8
Bahn Agha, Ama Johal
This systematic review and meta-analysis explores the association between facial phenotype and obstructive sleep apnea-hypopnea syndrome in adults. A comprehensive electronic (Medline via Ovid, Scopus, and Embase) database and reference search were undertaken in relation to imaging modalities for surface craniofacial assessments in subjects with sleep apnea. The outcome measures were surface facial dimensions, morphology and profile. The quality of studies was assessed and a meta-analysis conducted. The studies were weighted using the inverse variance method, and the random effects model was used to analyse data...
December 26, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28019041/interindividual-differences-in-the-dynamics-of-the-homeostatic-process-are-trait-like-and-distinct-for-sleep-versus-wakefulness
#9
Thomas Rusterholz, Leila Tarokh, Hans P A Van Dongen, Peter Achermann
The sleep homeostatic Process S reflects the build-up of sleep pressure during waking and its dissipation during sleep. Process S is modelled as a saturating exponential function during waking and a decreasing exponential function during sleep. Slow wave activity is a physiological marker for non-rapid eye movement (non-REM) sleep intensity and serves as an index of Process S. There is considerable interindividual variability in the sleep homeostatic responses to sleep and sleep deprivation. The aim of this study was to investigate whether interindividual differences in Process S are trait-like...
December 26, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28008673/daily-antecedents-and-consequences-of-nightly-sleep
#10
Soomi Lee, Tori L Crain, Susan M McHale, David M Almeida, Orfeu M Buxton
Sleep can serve as both cause and consequence of individuals' everyday experiences. We built upon prior studies of the correlates of sleep, which have relied primarily on cross-sectional data, to examine the antecedents and consequences of sleep using a daily diary design. Specifically, we assessed the temporal sequence between nightly sleep and daily psychosocial stressors. Parents employed in a US information technology company (n = 102) completed eight consecutive daily diaries at both baseline and 1 year later...
December 23, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27996170/association-between-patterns-of-jaw-motor-activity-during-sleep-and-clinical-signs-and-symptoms-of-sleep-bruxism
#11
Yuya Yoshida, Takeshi Suganuma, Masayuki Takaba, Yasuhiro Ono, Yuka Abe, Shuichiro Yoshizawa, Takuro Sakai, Ayako Yoshizawa, Hirotaka Nakamura, Fusae Kawana, Kazuyoshi Baba
The aim of this study was to investigate the association between patterns of jaw motor activity during sleep and clinical signs and symptoms of sleep bruxism. A total of 35 university students and staff members participated in this study after providing informed consent. All participants were divided into either a sleep bruxism group (n = 21) or a control group (n = 14), based on the following clinical diagnostic criteria: (1) reports of tooth-grinding sounds for at least two nights a week during the preceding 6 months by their sleep partner; (2) presence of tooth attrition with exposed dentin; (3) reports of morning masticatory muscle fatigue or tenderness; and (4) presence of masseter muscle hypertrophy...
December 20, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27995665/changes-in-sleep-duration-and-recreational-screen-time-among-canadians-1998-2010
#12
Judith A Leech
It is commonly claimed that sleep duration has declined in recent years - over a period coinciding with a marked increase in personal electronics and communications use. The aim of this study was to assess change in sleep duration among Canadians from 1998 to 2010, and examine any associations with non-work-related screen time. The analysis uses population-representative data from Statistics Canada's General Social Survey cycles of 1998 and 2010; the respective samples numbered 10 749 and 15 390 individuals...
December 20, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27976447/impact-of-sleep-restriction-versus-idealized-sleep-on-emotional-experience-reactivity-and-regulation-in-healthy-adolescents
#13
Radhika Reddy, Cara A Palmer, Christine Jackson, Samantha G Farris, Candice A Alfano
Sleep loss is associated with affective disturbances and disorders; however, there is limited understanding of specific mechanisms underlying these links, especially in adolescence. The current study tested the effects of sleep restriction versus idealized sleep on adolescents' emotional experience, reactivity and regulation (specifically cognitive reappraisal). Following 1 week of sleep monitoring, healthy adolescents (n = 42; ages 13-17 years) were randomized to 1 night of sleep restriction (4 h) or idealized sleep (9...
December 15, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27976438/insomnia-complaints-in-lean-patients-with-obstructive-sleep-apnea-negatively-affect-positive-airway-pressure-treatment-adherence
#14
Bjorg Eysteinsdottir, Thorarinn Gislason, Allan I Pack, Bryndís Benediktsdottir, Erna S Arnardottir, Samuel T Kuna, Erla Björnsdottir
The objective of this study was to evaluate the determinants of long-term adherence to positive airway pressure treatment among patients with obstructive sleep apnea, with special emphasis on patients who stop positive airway pressure treatment within 1 year. This is a prospective long-term follow-up of subjects in the Icelandic Sleep Apnea Cohort who were diagnosed with obstructive sleep apnea between 2005 and 2009, and started on positive airway pressure treatment. In October 2014, positive airway pressure adherence was obtained by systematically evaluating available clinical files (n = 796; 644 males, 152 females) with moderate to severe obstructive sleep apnea (apnea-hypopnea index ≥15 events per h)...
December 15, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27933667/a-mobile-web-based-system-can-improve-positive-airway-pressure-adherence
#15
Jordanna M Hostler, Karen L Sheikh, Teotimo F Andrada, Andrei Khramtsov, Paul R Holley, Aaron B Holley
SleepMapper is a mobile, web-based system that allows patients to self-monitor their positive airway pressure therapy, and provides feedback and education in real time. In addition to the usual, comprehensive support provided at our clinic, we gave the SleepMapper to 30 patients initiating positive airway pressure. They were compared with patients initiating positive airway pressure at our clinic without SleepMapper (controls) to determine whether SleepMapper affected adherence. A total of 61 patients had polysomnographic and adherence data analysed, 30 were given SleepMapper and 31 received our standard of care...
December 8, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27928860/physical-activity-subjective-sleep-quality-and-time-in-bed-do-not-vary-by-moon-phase-in-german-adolescents
#16
Maia P Smith, Marie Standl, Holger Schulz, Joachim Heinrich
Lunar periodicity in human biology and behaviour, particularly sleep, has been reported. However, estimated relationships vary in direction (more or less sleep with full moon) if they exist at all, and studies tend to be so small that there is potential for confounding by weekly or monthly cycles. Lunar variation in physical activity has been posited as a driver of this relationship, but is likewise not well studied. We explore the association between lunar cycle, sleep and physical activity in a population-based sample of 1411 Germans age 14-17 years (46% male)...
December 8, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27921347/objective-snoring-time-and-carotid-intima-media-thickness-in-non-apneic-female-snorers
#17
Jinyoung Kim, Allan I Pack, Barbara J Riegel, Julio A Chirinos, Alexandra Hanlon, Seung Ku Lee, Chol Shin
Controversy persists about whether snoring can affect atherosclerotic changes in adjacent vessels, independently of obstructive sleep apnea and other cardiovascular risk factors. This study examined the independent association between snoring and carotid artery intima-media thickness (IMT) in non-apneic snorers and non-snorers. We studied 180 non-apneic snorers and non-snorers participating in a full-night home-based sleep study. Snoring sound was measured objectively by a microphone. Based on snoring time across the night, participants were classified as non-snorers (snoring time: 0%), mild snorers (1-25%) and moderate to heavy snorers (≥25%)...
December 6, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27905159/the-interaction-of-sleep-and-amyloid-deposition-on-cognitive-performance
#18
Jennifer R V Molano, Catherine M Roe, Yo-El S Ju
Sleep difficulties are emerging as a risk factor for dementia. This study examined the effect of sleep and amyloid deposition on cognitive performance in cognitively normal adults. Sleep efficiency was determined by actigraphy. Cerebrospinal fluid Aβ42 levels <500 pg mL(-1) , indicating amyloid deposition, was present in 23 participants. Psychometric tests included the Free and Cued Selective Reminding Test, Trail Making Test A and B, Animal Fluency, Letter Number Sequencing, and the Mini Mental State Examination...
December 1, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27896929/impact-of-inflammation-and-oxidative-stress-on-carotid-intima-media-thickness-in-obstructive-sleep-apnea-patients-without-metabolic-syndrome
#19
Ya-Ting Chang, Hsin-Ching Lin, Wen-Neng Chang, Nai-Wen Tsai, Chih-Cheng Huang, Hung-Chen Wang, Chia-Te Kung, Yu-Jih Su, Wei-Che Lin, Ben-Chung Cheng, Chih-Min Su, Ting-Yao Chen, Yi-Fang Chiang, Cheng-Hsien Lu
Obstructive sleep apnea (OSA) increases the risk of cardiovascular diseases, and carotid intima-media thickness (IMT) is a good indicator of the severity of atherosclerotic disease. This study tested the hypothesis that inflammation and oxidative stress determined carotid IMT in patients with OSA. The carotid IMT, mean systolic and diastolic pressure (night and morning) were significantly higher and the level of thiols and high-density lipoprotein were significantly lower in our 121 OSA patients than in 27 controls (P < 0...
November 28, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27878883/school-start-time-and-sleep-in-canadian-adolescents
#20
Geneviève Gariépy, Ian Janssen, Mariane Sentenac, Frank J Elgar
Insufficient sleep is a serious problem in adolescents and school start time is thought to be a key contributor. This study provided the first comprehensive assessment of school start times across Canada and examined whether school start times were associated with sleep duration and tiredness among adolescents. We collected information on school start times from 362 schools that participated in the 2013/2014 Health Behaviour in School-aged Children study. We calculated sleep duration from weekday bedtime and wake time reported by 29 635 students (aged 10-18 years)...
November 23, 2016: Journal of Sleep Research
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