Obstructive sleep apnea (OSA) causes sleep-disordered breathing (SDB) due to upper airway obstruction. The severity of OSA changes with position during sleep. Patients with marked significant improvement in apnea–hypopnea index (AHI) level by sleep position change are defined as ‘‘positional patients’’ (PP), while those without improvement are defined as ‘‘non-positional patients’’ (NPP). We aimed

To clarify the predictors of poor sleep quality in Japanese adolescents. In 2010, baseline surveys were administered to students at 24 randomly selected schools—10 junior high schools and 14 senior high schools—in Japan. After 2 years, follow-up surveys were administered to the same students. The questionnaires included the following five items: basic attributes, sleep status, lifestyle factors, social

The incidence of sleep problems is increasing in children, and they are thought to contribute to pain in functional abdominal pain disorder (FAPD). In this study, we aimed to evaluate the pattern of sleep disturbance in children with FAPD and identify the associated factors. We retrospectively analyzed patients aged 12–18 years who were diagnosed with FAPD based on the Rome IV criteria. To assess sleep

Acute sleep deprivation upregulates hippocampal neurogenesis. Neurotrophic factors such as glial cell line-derived neurotrophic factor (GDNF), brain-derived neurotrophic factor (BDNF), and vascular endothelial growth factor (VEGF) are mediators of neuronal plasticity and neurogenesis. These neurotrophins are involved in sleep and sleep disorders and are associated with sleep deprivation. In this study

Thomas Dahl, PO Box 404, Guilford, CT 06437 USA. Email: tadahl@outlook.com. The objectives of the study were to demonstrate the efficacy and safety of SM-1 in a circadian challenge model of transient insomnia. Randomized, double-blind, placebo-controlled cross-over study utilizing a 5-h phase advance model of transient insomnia. Subjects were 85 healthy adults reporting a history of transient insomnia

This study aims to examine the relationship of sleep (sleep duration, sleep quality, and sleep rhythm) with presenteeism in workers while controlling for other confounding factors. A total of 2375 workers of six Japanese companies received self-administered questionnaires from June to November 2018. Information on sleep duration was used to evaluate sleep quantity, the Athens Insomnia Scale (AIS) was

Obstructive sleep apnea syndrome (OSAS) is considered to be an important predisposing factor for cardiovascular diseases. The main objective of this study was to investigate the impact of CPAP treatment on cardiac structure and function and to assess patient compliance over a long-term course of CPAP treatment. A total of 50 patients diagnosed with moderate-to-severe OSAS based on overnight study,

The main objective of this study is to assess the prevalence of sleep disturbance and related psychological factors (stress, anxiety and depression) among frontline nurses in Oman during the COVID-19 pandemic. A cross-sectional and descriptive correlational design using Qualtrics® software was used in this research. Data were collected using the Pittsburgh Sleep Quality Index (PSQI), the Hospital Anxiety

Background Although restless legs syndrome (RLS) is one of the most frequent movement disorders, it is often misdiagnosed or even unrecognized. The aim of this study is to determine the prevalence of RLS among adult population (individuals who are older than 18 years old) in the city center of Canakkale, from northwest of Turkey. Method This community-based study was performed as a cross-sectional

The purpose of this study was to analyze the regional trends of sleep apnea medical care utilizing the National Database of Health Insurance Claims and Specific Health Checkups of Japan Open Data Japan (NDB-ODJ), which records data on the number of health insurance claims in Japan. Data were obtained on the number of adaptive servo-ventilation (ASV), continuous positive airway pressure (CPAP), and

Insomnia catastrophizing has attracted attention in recent years. Individuals may have started to recognize the importance of evaluating the consequences of insomnia, which has worsened during the coronavirus disease 2019 (COVID-19) pandemic. The present study aimed to test the validity and reliability of the Insomnia Catastrophizing Scale (ICS) in the Turkish young adult population. The study group

This study revised the Chinese version of 11-item circadian-type inventory (CTI-11) and examined its validity and reliability in textile workers. 3833 workers were recruited to complete the Chinese version of CTI-11. The Composite Scale of Morningness (CSM) was used as the concurrent validity instrument. The exploratory factor analysis revealed that the Chinese version of CTI-11 consists of two factors:

The burden of rapid eye movement (REM) sleep behaviour disorder is well documented, however the significance of isolated REM sleep without atonia is unclear. We evaluated the prevalence and predictors of RSWA in a sleep clinic population. We analysed data in three groups—patients meeting American Academy of Sleep Medicine (AASM) criteria for loss of REM atonia (RSWA), elevated REM EMG activity which

To verify the combined and isolated effects of alcohol consumption and one night of sleep deprivation on maximal strength, muscle endurance and aerobic performance. Also, to verify the association between perceived fatigue and exercise performance. Ten male participants were randomized into four conditions: (1) placebo consumption + normal sleep (PLA + SLE); (2) alcohol consumption + normal sleep (ALC + SLE);

Daytime sleepiness is a cardinal symptom of obstructive sleep apnoea (OSA) and a well-recognised side effect of beta-blockers, therefore patients with OSA under this treatment may have worse sleepiness. However, the interaction between daytime sleepiness and beta-blockers use has not been thoroughly investigated in patients with OSA before. We analysed the data of 2183 individuals (1852 patients with

Psychiatric disorders have been described many times in patients with restless legs syndrome (RLS). RLS, as depressive and anxiety disorders being the most common. However, studies on obsessive–compulsive disorders (OCD) symptoms in RLS are limited. In this study, we aimed to evaluate OCD symptoms in patients with RLS and to determine the impact of pramipexole, a dopamine agonist, on symptoms of OCD

Essential tremor (ET) is a complex, neurodegenerative disorder that includes motor and non-motor symptoms. There is growing interest in its non-motor features, including sleep disturbances (SD). There are no studies evaluating the brain structural correlates of SD in ET. We aimed to identify brain microstructural changes related to SD in ET. SD was evaluated using the Pittsburg sleep quality index

Purpose This study aimed to assess the success of the Japanese government’s “Early to bed, early to rise, and don’t forget your breakfast” (EB, ER, and DFB) health promotion program for adolescents, which has been ongoing since 2006. Methods We randomly selected 264 junior and senior high schools and conducted a survey of their habits related to EB, ER, and DFB. We defined EB, ER, and DFB as follows:

Generally applicable qualifications of sleep and principles for achieving better sleep are difficult to design, because sleep quality can depend on individual demographic characteristics and lifestyles. In this study, the static and dynamic features of sleep–wake patterns were analyzed in association with quantitative sleep-related parameters and self-rated sleep quality to serve as a practical selection

Patients with cancer tend to have an increased risk of sleep disorders. The exact association between cancer and sleep disorders remains uncertain. We aimed to investigate whether elevated perceived stress is linked to a higher risk of sleep disorders in patients with and without cancer history respectively. A total of 941 adult individuals from the Midlife in the United States (MIDUS) study were included

The aim was to assess sleep quality in pregnant women, characterize sleep patterns in each trimester and to establish independent risk factors of poor sleep quality during gestation. A cross-sectional survey was conducted. The questionnaire included questions regarding sociodemographic data, information on the current pregnancy, sleep patterns and Pittsburgh Sleep Quality Index. 7202 respondents fulfilled

The aim of this study is to determine the relationship between diet quality and overall sleep quality, sleep duration, and presence of insomnia in the university-term female. This cross-sectional study was conducted on 412 female university students aged between 19 and 24 years in Turkey. The participants’ socio-demographic characteristics, anthropometric measurements, the Pittsburg Sleep Quality Index

Restless leg syndrome (RLS) is a sensory-motor problem characterized by an uncomfortable and unpleasant feeling that causes a strong and irresistible desire to move the legs, often during periods of inactivity during sleep. Published full-text studies including non-pharmacological interventions used in the management of restless leg syndrome constitute the data of the study. Data were collected from

(1) To analyze the effectiveness of a school-based sleep education program on sleep duration, latency, and efficiency, as well as separated by weekdays and weekend days and by sex. (2) To analyze children's sleep patterns (duration, latency, and efficiency) on weekdays and weekend days and by sex. A total of 110 children (average age of 8.4 (0.3) years, 62% girls) (experimental group (60 children,

The aim of the study was to examine the relationship between sleep problems and objective driving behaviors of short-haul commercial truck drivers in Japan. One hundred and ten male short-haul commercial truck drivers’ sleep duration, sleep quality (Pittsburgh Sleep Quality Index), and frequency of sleepiness at the wheel were measured by survey in June 2019. In addition, their dangerous driving behaviors

Patients with chronic pain develop peripheral neuropathy and experience sleep disturbance. Yokukansan is used to treat insomnia and control neuropathic pain. We studied if Yokukansan affects neuropathic pain and sleep disturbance using a rat model of chronic constriction injury (CCI). Male Wistar rats (4-week age) were divided into the following groups (n = 7, per group): CCI rats fed normal chow (CCI-0);

We aimed to investigate the association between sleep disorders and 5-year all-cause and disease-specific mortality. In this population-based cohort study, data from the sample cohort of the National Health Insurance Service, that was developed as a representative of the South Korean population were extracted. Sleep disorder was defined based on the 10th edition of the International Classification

To evaluate specific features of sleep pattern and neurocognitive performance in OSA obese adolescents to correlate sleep macrostructural parameters and phasic events (K-complexes, KCs; and sleep spindles, SSs) with cognitive functioning in these individuals. Polysomnography was recorded from 25 male apneic obese patients (15–17 years), 20 age- and sex-matched non-apneic obese and 15 lean adolescents

Purpose This study was carried out to reveal the effect of sleep hygiene training applied to individuals taking hemodialysis treatment on patients' sleep quality and quality of life. Methods The study was completed with 34 intervention group patients and 33 controls, being totally 67 patients. Intervention group was given sleep hygiene training once week for 3 weeks and individual interviews were conducted

One hundred and eleven youth with mental ill-health underwent systematic clinical, laboratory and actigraphy monitoring to report associations between 24-h sleep–wake patterns and cardiometabolic risk factors. Multiple linear regression analyses, controlling for medication usage and class, age and sex, found significant associations between: later sleep onset and BMI; standard variation (SV) in the

To promote better sleep, we designed a motion mattress producing slow and swaying movements by slow regional changes of height generated by 10 separated air cells underneath. The motion induces a stretching movement and a gentle swaying movement of the user’s body. In this study, we examined its sleep-improving effects. Subjects who were not fully satisfied with their sleep were recruited. The study

Deciphering the significance of dreams, remains a dream till date. A little is known about its underlying mechanism, brain regions involved and implications with wake life. This review is aimed to investigate the latest developments to summarize the differences in nature of dreams in Rapid eye movement and Non rapid eye movement sleep, possible role of dreams in day to day life with larger focus on

To examine the longitudinal associations of sleep duration and sleep quality with coronary heart disease (CHD) risk among individuals aged ≥ 20 years. A systematic review and meta-analysis of observational cohort studies were performed to evaluate the association between sleep quality and duration, and the risk of CHD. We searched three databases including PUBMED, the Cochrane Library and EMBASE, selected

One must process others’ facial affect proficiently to facilitate social functioning, and both social functioning and processing of facial affect can be impaired in sleep-deficient states. Based on mood-salience, decreased positive affect and increased negative affect experienced from sleep deficits or from depression might differentially modulate attentional responses to others’ positive and negative

Sleep disorders in patients with end-stage renal disease are common but have rarely been reported in previous studies. Therefore, we examined the prevalence of sleep disorders and the risk factors for declining sleep quality in patients undergoing peritoneal dialysis (PD). A multicenter prospective cohort study was conducted at five PD centers across different provinces in China. A total of 449 patients

The existing studies on the association between the decline in handgrip strength (HGS) and poor sleep are uncertain. This study aimed to evaluate the independent association between HGS and sleep quality assessed by global Pittsburgh Sleep Quality Index (PSQI) score in the middleaged and elderly population. Data were obtained from the Midlife in the United States (MIDUS) study, a longitudinal study

To investigate the prevalence of restless legs syndrome (RLS) in chronic obstructive pulmonary disease (COPD) patients. The symptoms and severity of RLS was evaluated by the International Restless Legs Syndrome Group Study (IRLSSG). Mann–Whitney U test, Chi-square test and Spearman correlation coefficient were used to analyze the data. Out of the 109 COPD patients, 18.3% were diagnosed with RLS. There

There is a relationship between extreme sleep duration and increased food intake. Some studies have reported that there was no change in the homeostatic aspects of energy balance, despite the increased nutrient intake, and in this case, the hedonic aspects may be effective. The purpose of this study was to examine the associations of hedonic hunger with sleep quality and duration among university students

To evaluate changes in the sleep patterns of patients undergoing general anesthesia for maxillofacial plastic surgery. A total of 200 consecutive craniofacial plastic surgery patients were enrolled in this study. Sixteen patients who did not stay in the craniofacial ward on the night before surgery were excluded, providing a final total of 184 patients. PSQI was used to evaluate sleep quality 1 month

Heart rate variability (HRV) considered as an indicator of the autonomic activity, shows differences between NREM and REM sleep. However, when evaluating during NREM sleep, some authors evaluate without considering the different stages, while others do it. There are discrepancies between values obtained from stages N2 and N3. Our objective was to evaluate whether differences exist between stages N2

Athletes are at risk of overtraining. Therefore, athletes need to build a strategy to get a better condition after training. If optimum recovery is achieved by good sleep, athletes can be engaged in other physical activities or increase the load of exercise in the upcoming days. Thus, we assumed that sleep quality is related to the performance of football athlete. To investigate if there is correlation

The purpose of this study is to assess the sleep quality, mental health status, and associated factors among medical workers during the coronavirus disease 2019 (COVID-19) pandemic. A cross-sectional study was conducted and medical workers in Ningbo, China were recruited. Sleep quality was evaluated by Pittsburgh Sleep Quality Index (PSQI). Mental health status was evaluated by Symptom Checklist 90

Obstructive sleep apnea (OSA) is a disease characterized by a brief period of cessation or marked decline in ventilation. The standard treatment is continuous positive airway pressure (CPAP). To determine the indication, full-night polysomnography (PSG) is required; however, it is a stressful examination. We verified the usefulness of pulse-oximetry at home as a predictor for CPAP indication before

The Department of Respiratory Care and Sleep Control Medicine is funded by endowments from Philips, ResMed, Fukuda Denshi, and Fukuda Lifetec Keiji to Kyoto University. He has also received honoraria for giving lectures from Philips, and Teijin Pharma. Coronavirus disease 2019 (Covid-19) was first discovered in Wuhan, China in late 2019[1]. Thereafter there has been a rapid spread of the virus, leading

Cataplexy is a sudden drop of antigravity-muscle tone triggered most often by positive emotional factors, which is one of the major symptoms of narcolepsy. Cataplexy has been treated pharmacologically, most often with tricyclic antidepressants. Even though tricyclic antidepressants are effective in reducing sleep paralysis and hypnagogic hallucinations, they even enhance daytime sleepiness, dizziness

We intend to examine whether behavioral and mental health-related determinants including stress level, daytime sleepiness, sleep disorders, smoking, drinking, physical activity, and vegetable intake were associated with severity of jet lag and symptoms of jet lag. We delivered a survey to All Nippon Airways HOLDINGS (ANA) customers in Japan and U.S. asking for their lifestyle information, subjective

Sleep-disordered breathing and sleep-related symptoms are frequent in patients with severe amyotrophic lateral sclerosis (ALS). We aimed to describe sleep quality, sleep structure, and the occurrence of sleep-disordered breathing in patients with early ALS, at the time of initial evaluation in a tertiary care center. Sleep-related symptoms were collected using questionnaires, the Pittsburgh Sleep quality

Old age, hypertension, obesity and diabetes are the major risk factors for severe disease with COVID 19. However, snoring and obstructive sleep apnoea (OSA), unrecognised, or under reported [1], occurs in over 50% of these comorbidities [2], and is a known risk factor for pneumonia. Preliminary reports confirm an association between OSA and severe COVID 19 disease [3]. Aspiration during sleep is among

Midday napping, a culturally perceived health behavior, is common among adolescents in China. This study aimed to examine the factors associated with habitual midday napping behavior and explore sex differences in these factors. The sample comprised 1549 (62.5% males; mean age 16.29 ± 1.01 years) adolescents from a vocational high school that provided midday napping opportunities. Midday napping and

The aim of this study was to investigate the sleep quality of spouses of patients with restless legs syndrome (RLS). Total 49 spouses of patients with RLS (Group 1) and 47 age- and sex-matched healthy volunteers (Group 2) were enrolled. Sleep quality was assessed by Pittsburgh Sleep Quality Index (PSQI). Insomnia Severity Index (ISI), Epworth Sleepiness Scale (ESS), Beck Depression Inventory (BDI)

Weight loss is one of the first line treatments for people with obstructive sleep apnea (OSA); however, people with OSA may have difficulties losing weight. Few studies have investigated the factors underlying these challenges in people with OSA. The aim of this study was to compare dietary intake, eating behavior and physical activity data in people with OSA and without OSA. Seventy-four patients

The main objective of this study is to assess the prevalence of sleep disorders in treatment-naïve children and adolescents with ADHD compared with healthy controls matched for age and gender; and, at the same time, to determine whether stimulant medication (methylphenidate) affects sleep in the same group of children and adolescents with ADHD (naïve) after a 3-month treatment. A total of 120 children

Healthy lifestyles are important during adolescence due to their impact on health-related problems and life expectancy during adulthood. Despite the emphasis on the importance of healthy habits, the high prevalence of breakfast skipping, physical inactivity, and insufficient sleep is reported among adolescents. This study was aimed to investigate the relationship between sleep quality (SQ) and nutritional

Floppy eyelids are usually asymmetrical, and more severe on the side the patient sleeps on. This has been related to the mechanical basis of this entity’s pathophysiology. Patients who exhibit floppy eyelid syndrome (FES) tend to suffer from obstructive sleep apnea and other sleeping disorder such as snoring; therefore, their spouses are likely to be found sleeping facing away from them. In this study

The aim was to examine the interrelationship between sleep quality of 1-month infants and mothers, mothers’ corresponding activities to infant’s night sleep, and mother’s mental health. A cross-sectional survey with self-reported questionnaire was conducted among 437 healthy mother–infant pairs at 1-month postpartum delivered at a maternal hospital in Tokyo. The main measurements were the presence

Perceived stress is strongly associated with sleep problems. Despite the evidence linking these variables, research examining the reciprocal relationships between them using non-recursive models, which include feedback loop between endogenous variables, is lacking. The main objective was to analyse if there is a bidirectional relation between perceived stress and insomnia symptoms with a model using

Inflammation activation is associated with adverse outcomes in patients with heart failure (HF). Sleep-disordered breathing (SDB) observed in 50% of patients with HF worsens the clinical outcome of HF, possibly through the exacerbation of inflammation. However, data on inflammation activation related to SDB are limited in patients with HF. We investigated the relationship between SDB severity and serum

Research and clinical practice have demonstrated that patients with insomnia are a heterogeneous population. As such, it is important to understand and differentiate the potential sub-groups among insomnia patients as well as individuals at risk for insomnia. Questionnaires completed by 291 students of both sexes and at risk for insomnia (FIRST scale score ≥ 22) were analyzed (age range 17–24 years)

The purpose of the study is to evaluate sleep disorders in dysmenorrhea patients and investigate the relationship between sleep disorders and anxiety and depression levels in these patients. This cross-sectional study included 55 primary dysmenorrhea patients who were admitted to the emergency department as well as 47 healthy control subjects. All participants were assessed using Beck Depression Inventory

Sleep disorders pose a serious threat to human, which may cause variety diseases. Recent reviews on the epidemiology examine that gastroesophageal reflux disease (GERD) has different levels of causality about asthma, chronic dry cough, sleep apnea, non-cardiac chest pain, chest tightness, and chronic bronchitis. The relationship between sleep disorders and GERD has been explained in various ways, but