Associations of adverse childhood experiences with adolescent total sleep time,social jetlag,and insomnia symptoms

Study objectiveAdverse childhood experiences (ACEs) are associated with sleep problems in adulthood, but less research has focused on ACEs and sleep during adolescence. The goal of the present study was to explore associations between ACEs reported at ages 5 and 9 years, and sleep (ie, total sleep time (TST), social jetlag, and insomnia symptoms) at age 15.MethodsParticipants comprised 817 families from the Fragile Families and Child Wellbeing Study, a nationally representative sample of children born to unwed parents. Number of ACEs was constructed from primary-caregiver reports at ages 5 and 9, and sleep measures (ie, TST, social jetlag, and insomnia symptoms) were derived from adolescent-reported sleep behaviors at age 15.ResultsAdjusting for sex and race/ethnicity, ACEs at age 9 were associated with longer weekend TST (B = 0.16, 95% CI = 0.04, 0.28), more social jetlag (B = 0.17, 95% CI = 0.07, 0.27), and higher odds of trouble falling asleep ≥3 times per week (Odds Ratio = 1.24, 95% CI = 1.01, 1.53). In females only, ACEs were associated with greater school night TST (B = 0.12, 95% CI = 0.01, 0.23). Results were similar after further adjustment for symptoms of anxiety and depression. Associations among ACEs, social jetlag, and insomnia symptoms appeared strongest among Non-Hispanic Black adolescents.ConclusionACEs appear to be related to multiple aspects of sleep in adolescence. Additional research is needed to confirm these associations and examine the extent to which sleep disturbances associated with ACEs account for later health outcomes.     

Trajectories of sleep problems from adolescence to adulthood. Linking two population-based studies from Norway

Study objectiveThe aim of the study is to assess stability and predictors of insomnia and sleep duration from adolescence to early adulthood.MethodsA longitudinal sample of 1257 individuals from three age cohorts were assessed from linked population-based studies, the youth@hordaland study from 2012 (age 16–18) and the SHoT2018 study (age 22–25). Identical measures of insomnia symptoms and sleep duration were analysed.ResultsThe stability of insomnia was high from adolescence to young adulthood, 50% of those with insomnia symptoms in adolescence still had insomnia symptoms six years later (adjusted IRR = 2.01; (CI 95%; 1.5–2.44)). Short sleep duration was also stable, with 67.8% of the adolescents in the lowest sleep duration quartile still remaining in the lowest quartile six years later. The overall rate of insomnia symptoms, long wake after sleep onset (WASO), and oversleeping increased from adolescence to young adulthood. Also, we observed a reduction in sleep efficiency and later rise times. There was no significant change in sleep onset latency (SOL).ConclusionInsomnia symptoms and short sleep duration are prevalent during both adolescence and young adulthood. Considerable individual stability and a rising rate of insomnia symptoms were observed over time. These findings underscore the importance of early identification and timely interventions to prevent chronic sleep problems.     

Reciprocal dynamics between self-rated sleep and symptoms of depression and anxiety in young adult women: a 14-day diary study

ObjectivesThe objective of this study was to characterize the day-to-day associations among sleep disturbance, depression, and anxiety in a sample of young adult women.MethodsOne hundred and seventy-one women (20.1 ± 3.3 years) completed in-laboratory baseline assessment followed by daily online surveys across a two-week period. Daily measures included the Mood and Anxiety Symptom Questionnaire-Short Form to assess shared and disorder-specific symptoms of depression and anxiety (general distress, anhedonic depression, and anxious arousal), as well as self-reported total sleep time (TST), sleep-onset latency (SOL), and sleep quality (SQ).ResultsFindings supported bidirectional day-to-day relationships between sleep and affective symptoms. When women felt greater general distress (shared features of anxiety and depression), they experienced longer SOL and worse SQ at night. Specificity among depression, anxiety, and sleep disturbance was observed such that higher levels of depression-specific anhedonia presaged longer SOL, shorter TST, and poorer SQ. In the other direction, when women had poor-quality sleep, they later experienced greater anhedonic depression and anxious arousal. The influence of TST on anhedonia was complex such that a single night of short sleep led to less anhedonic depression the next day, whereas women who obtained shorter sleep across the two-week period reported greater anhedonia.ConclusionsReciprocal dynamics between nightly sleep disturbance and daily experiences of depression and anxiety may serve as a process by which insomnia, depression, and anxiety develop into comorbid clinical states over time in women. The associations of anhedonic depression with nightly sleep disturbance and chronic short sleep were especially toxic, offering insight into daily mechanisms driving the most prevalent phenotype of comorbid insomnia.     

Associations of sleep duration and quality with incident cardiovascular disease,cancer, and mortality: a prospective cohort study of 407,500 UK biobank participants

ObjectiveFew studies have investigated the associations of sleep duration and sleep quality with incident cardiovascular diseases (CVDs), cancer, and mortality in the same large population. This study aimed at estimating the independent risk factors of long or short sleep durations and several typical characteristics of poor sleep quality for incident CVDs, cancer, and mortality.MethodsIn this prospective cohort study, 407 500 individuals were enrolled. Cox proportional hazards models were used to calculate the adjusted hazard ratios and 95% confidence intervals (HR, 95%CI) of associations of sleep duration and quality with incident CVDs, cancer, and mortality.ResultsCompared with the sleep duration of 7 h, sleep duration of ≤5 h and ≥9 h were both associated with higher risk of all-cause mortality (HR = 1.25, 95% CI: 1.16–1.34 and HR = 1.30, 95% CI: 1.22–1.38, respectively), CVD mortality (HR = 1.27, 95% CI: 1.09–1.49 and HR = 1.32, 95% CI: 1.16–1.50, respectively), and CVD incidence (HR = 1.23, 95% CI: 1.16–1.31 and HR = 1.08, 95% CI: 1.02–1.15, respectively). Additionally, long sleep duration (≥9 h) was associated with a higher risk of cancer mortality (HR = 1.19, 95% CI: 1.10–1.30) and cancer incidence (HR = 1.08, 95% CI: 1.04–1.12). Moreover, CVD incidence was significantly associated with snoring, insomnia and narcolepsy, increasing the risk by 7%, 26%, and 20%, respectively.ConclusionLong sleep durations may substantially increase the risk of mortality and morbidity. Snoring, insomnia, and narcolepsy were independent risk factors for incident CVD.     

Relations between sleep, fatigue, and health-related quality of life in individuals with insomnia

Objective

This study explored the relations between sleep, fatigue, and health-related quality of life in a sample of individuals with chronic insomnia.

Methods

A total of 160 adults meeting the diagnostic criteria for chronic insomnia underwent three nights of polysomnography (PSG) and completed sleep diaries and questionnaires assessing daytime functioning including fatigue and health-related quality of life.

Results

A cluster analysis was conducted based on PSG-defined sleep disturbances and fatigue severity. A four-cluster solution (R²=0.68) was found, classifying individuals as having either (a) both severe sleep disturbance and severe fatigue (n=15); (b) severe sleep disturbance but milder fatigue (n=15); (c) milder sleep disturbance but severe fatigue (n=68); or (d) both milder sleep disturbance and milder fatigue (n=61). Health-related quality of life was lower in both clusters with severe fatigue compared to those with milder fatigue and was further decreased when severe sleep disturbances were present. Relations between several indicators of fatigue and health-related quality of life were then examined using factor analysis in order to identify different domains of impairment. A three-factor structure was selected, suggesting that daytime symptoms can be classified as relating to fatigue, physical health, or mental health. These different subtypes of daytime impairment were predicted by distinct sets of variables.

Conclusion

More severe fatigue is not necessarily related to poorer PSG-defined sleep but appears associated with greater impairment in health-related quality of life. Fatigue and health-related quality of life appear to be distinct but interrelated constructs.     

Associations between sleep bruxism,sleep quality,and exposure to secondhand smoke in Japanese young adults: a cross-sectional study

ObjectiveSleep bruxism, a major sleep disorder that causes serious harm to oral health, is considered a multifactorial disease. Sleep bruxism can be induced by smoking, which also adversely affects sleep quality. The objective of present study was to clarify the associations between sleep bruxism, sleep quality, and exposure to secondhand smoke (SHS).MethodsTo assess the prevalence of sleep bruxism, sleep quality, and SHS exposure, we conducted oral examinations and self-report questionnaires on university students in Japan. Sleep bruxism and quality were screened using the Japanese version of the Pittsburgh Sleep Quality Index (PSQI) and the third edition of the International Classification of Sleep Disorders (ICSD-3). The inclusion criteria were adults aged between 18 and 19 years, non-smokers and non-alcohol drinkers. The exclusion criteria was failing to complete the questionnaire in full.ResultsWe analyzed a total of 1781 Japanese young adults. Young adult females who had been exposed to SHS had worse sleep quality (p = 0.019) than those who had not. Young adult female with worse sleep quality showed a higher prevalence of sleep bruxism (p = 0.034) than those with better sleep quality. Using structural equation modeling, direct associations were identified between SHS exposure and poor sleep quality (standardized coefficients, 0.153; p = 0.008) and between sleep bruxism and poor sleep quality (standardized coefficients, 0.187; p = 0.022) in young adult females. However, no association was found among young adult males.ConclusionSHS exposure is indirectly associated with sleep bruxism through poor sleep quality in Japanese young adult females.     

Poor sleep quality and resistant hypertension

Objectives

We aimed to determine the relationship between sleep quality and treatment-resistant hypertension (RH).

Methods

In our cross-sectional cohort study, 270 consecutive essential hypertensive patients were recruited at the Outpatient Hypertension Unit, University of Pisa, Italy. The Pittsburgh Sleep Quality Index (PSQI), Beck Depression Inventory (BDI), and State-Trait Anxiety Inventory (STAI-Y2) were administered to all subjects. RH was defined as office blood pressure (BP) >140/90 mmHg with three or more antihypertensive drugs or controlled BP with four or more drugs. Poor sleep quality was defined as PSQI >5, depressive symptoms as BDI >10, and trait anxiety as STAI-Y2 >40. Patients with other sleep disorders were excluded.

Results

Complete data were available for 222 patients (50.9% men; mean age, 56.6 ± 12.5 y; RH, 14.9%). Poor sleep quality had a prevalence of 38.2% in the overall population. RH was associated with poor sleep quality, increased sleep latency and reduced sleep efficiency. No significant relationship was found between RH and short sleep duration or depressive symptoms and trait anxiety. Poor sleep quality was more prevalent in resistant vs nonresistant hypertensive women (70.6% vs 40.2%; P = .02) but not in resistant vs nonresistant men (43.8% vs 29.2%; P = .24). In women poor sleep quality was an independent predictor of RH, even after adjustment for cardiovascular and psychiatric comorbidities (odds ratio [OR], 5.3 [confidence interval {CI}, 1.1–27.6), explaining 4.7% of its variance. In men age, diabetes mellitus (DM), and obesity were the only variables associated with RH.

Conclusions

Poor sleep quality is significantly associated with resistance to treatment in hypertensive women, independent of cardiovascular and psychiatric confounders.     

Associations between sleep,daytime sleepiness and functional outcomes in adolescents with ADHD

Objective/backgroundAdolescents with attention-deficit/hyperactivity disorder (ADHD) experience greater difficulties in the domains of sleep, daytime sleepiness, and functioning compared to their peers. However, the relationship between these domains has not been fully elucidated. This study aimed to examine the relationship between sleep problems (including daytime sleepiness), ADHD severity, and functional outcomes (irritability, sluggish cognitive tempo, homework difficulties, and substance use) in a sample of adolescents with ADHD.Patients/methodsEighty-two adolescents (13–17 years) and their families participated in the study. Sleep was measured by both adolescent and parent-report. Adolescent irritability and sluggish cognitive tempo were reported by both adolescents and parents, while other variables were reported by a single reporter (homework difficulties – parent; ADHD severity – parent; substance use – adolescent). Analyses controlled for demographic factors and internalising and externalising comorbidities.ResultsA weak relationship was found between adolescent-reported sleep problems and daytime sleepiness, which became non-significant in adjusted analyses (β = −0.19, p = 0.115). In adjusted analyses, there was an association between adolescent-reported sleep problems and adolescent-reported irritability (β = −0.27, p = 0.023) as well as between adolescent-reported daytime sleepiness and parent-reported sluggish cognitive tempo (β = 0.28, p = 0.033). In adjusted analyses, parent-reported adolescent sleep problems were associated with ADHD severity (β = 0.54, p = <0.001), parent-reported sluggish cognitive tempo (β = 0.64, p = <0.001), both reporters of irritability (parent-report: β = 0.32, p = 0.004; adolescent-report: β = 0.29, p = 0.022), and homework problems (β = 0.37, p = 0.003). Parent-reported daytime sleepiness was associated with parent-reported sluggish cognitive tempo (β = 0.34, p = 0.024).ConclusionsThis study demonstrates the importance of a holistic assessment of adolescents with ADHD, not only focusing on symptomatology but also on sleep problems and functional outcomes. The importance of multi-informant assessment of sleep problems is also reinforced.     

伴失眠的缓解期抑郁症患者客观睡眠质量与认知功能的关系

目的 探讨伴失眠的缓解期抑郁症患者客观睡眠质量与认知功能的关系。方法 在北京回龙观医院筛选缓解期抑郁症患者47例,采用失眠严重程度指数量表（ISI）和匹兹堡睡眠质量指数量表（PSQI）前四项计算的睡眠效率对患者进行分组,最终伴失眠组22例,不伴失眠组25例。通过多导睡眠监测（PSG）评定患者客观睡眠情况,采用重复性成套神经心理状态测验（RBANS）评定患者认知功能。建立回归模型探究伴失眠的缓解期抑郁症患者客观睡眠质量与认知功能的关系。结果伴失眠与不伴失眠的缓解期抑郁症患者RBANS即刻记忆因子评分差异有统计学意义（t=-2.102,P<0.05）。伴失眠组的睡眠效率（Z=-2.113,P<0.05）、N3期占比（Z=-3.175,P<0.01）和N3期持续时间（Z=-3.196,P<0.01）均小于不伴失眠组,夜间总清醒时间（Z=-2.058,P<0.05）、N1期占比（Z=-2.399,P<0.05）和N1期持续时间（Z=-2.463,P<0.05）均多于不伴失眠组。伴失眠组REM期占比增加与注意功能的改善相关（β=0.953,95%CI:0...     

Associations of accelerometer-based sleep duration and self-reported sleep difficulties with cognitive function in late mid-life: the Finnish Retirement and Aging Study

ObjectivesPrior evidence suggests that sleep duration and sleep difficulties may be associated with cognitive function in old age, but little is known about the sleep–cognition association in late mid-life. Our aim was to examine the associations of accelerometer-based sleep duration as well as subjective sleep difficulties with different domains of cognitive function among aging workers.MethodsThe study population consisted of 289 participants (mean age 62.4 years, SD 1.02; 83% women) from the Finnish Retirement and Aging Study (FIREA). Sleep difficulties were measured using Jenkins Sleep Problem Scale (difficulties falling asleep, difficulties maintaining sleep, waking up too early in the morning, and nonrestorative sleep). Sleep duration was measured with wrist-worn accelerometer and self-report, and participants were divided into short (<7 h/night), mid-range (7–9 h/night) and long (≥9 h/night) sleepers. Participants underwent extensive cognitive testing covering three domains: (1) memory, (2) executive function, and (3) attention and information processing.ResultsGreater difficulties in waking up too early in the morning were associated with poorer executive function measured with Spatial Working Memory (SWM) test (p = 0.005). Additionally, nonrestorative sleep was associated with poorer executive function measured with Trail Making Test, B–A, (p = 0.036) and borderline significantly with lower SWM (p = 0.056). Compared to mid-range sleepers, long sleepers tended to have poorer cognitive function (all memory function tests and SWM), but the associations were not statistically significant due to small number of long sleepers.ConclusionsSubjective sleep difficulties may be linked to poorer executive function in a relatively healthy population of older workers in their 60 s. Thus, promoting good sleep quality may translate into better cognitive health in late mid-life.     

Agreement between sleep diary and actigraphy in a highly educated Brazilian population

ObjectiveThis study evaluated the agreement between a sleep diary and actigraphy on the assessment of sleep parameters among school teachers from Brazil.MethodsA total of 163 teachers (66.3% women; aged 45 ± 9 years) filled out a sleep diary and wore a wrist actigraph device for seven consecutive days. Data were collected from August 2014 to March 2015 in Londrina, a large city in southern Brazil. Intraclass correlation coefficients (ICC) and Pearson correlation coefficients (r) were used to compare self-reported and actigraphic data.ResultsSelf-reported total sleep time (TST), sleep onset latency (SOL), and sleep efficiency were higher than measured by actigraphy (mean difference: 22.6 ± 46.9 min, 2.6 ± 13.3 min, and 7.3± 5.7%, respectively). Subjective total time in bed (TIB) and wake-up time were lower than measured by actigraphy (mean difference: −10.7 ± 37.6 and −19.7 ± 29.6, respectively). Moderate or good agreement and correlation were found between the sleep diary and the actigraphic data for TST (ICC = 0.70; r = 0.60), TIB (ICC = 0.83; r = 0.73), bedtime (ICC = 0.95; r = 0.91), sleep start time (ICC = 0.94; r = 0.88), and wake-up time (ICC = 0.87; r = 0.78). However, SOL (ICC = 0.49; r = 0.38) and sleep efficiency (ICC = 0.16; r = 0.22) showed only fair or poor agreement and correlation.ConclusionIn this highly educated population, the sleep diary and the actigraphy showed moderate or good agreement to assess several sleep parameters. However, these methods seemed to measure different dimensions of sleep regarding sleep onset latency and efficiency. These findings moderately varied according to the individual's subjective sleep quality.     

Poor sleep quality is associated with worse self-rated health in long sleep duration but not short sleep duration

Unhealthy sleep duration, either short or long, is associated with worse health and central subjective dimensions of sleep and health such as fatigue. It has been argued that the link between sleep duration and health may depend on the quality of the slept hours, and on its functional impact (ie, fatigue). The present study therefore assessed whether the relationship between last night's sleep duration and general self-rated health (SRH) differs as a function of sleep quality, and secondly, whether current fatigue and sleep quality are factors linking sleep duration and SRH.The present cross-sectional dataset involved 1304 individuals (57% female, M_age = 28.8, range 18–79). Participants completed surveys for general SRH, previous night's sleep duration and sleep quality, and current fatigue.Results showed the expected inverted U-shaped (ie, quadratic) relation between last night's sleep duration and SRH and a linear relation between last night's sleep quality and SRH. However, long sleep duration was only associated with poorer SRH in individuals who also reported poor sleep quality. Further, the quadratic relationship between sleep duration and SRH was partially mediated by fatigue and sleep quality.The results of this multi-study analysis suggest that SRH is particularly poor in those who slept both long and with poor quality the night before, while good sleep quality may protect those with a long sleep duration from poor SRH. Thus, last night's long sleep does not seem to be associated with poor subjective health unless it is coupled with poor sleep quality. Furthermore, fatigue and sleep quality are potential pathways linking short and long sleep duration with SRH. Different dimensions of sleep interact in their association with health, and future research will benefit from an integrative approach.     

Maternal and paternal sleep during pregnancy in the Child-sleep birth cohort

Study objectivesMaternal and paternal sleep insufficiency during pregnancy appears to be a risk factor for health and wellbeing in young families. Here, we evaluated the prevalence of sleep insufficiency and symptoms of insomnia during pregnancy (at 32nd pregnancy week) and their relationship to depression, anxiety and environmental stress.MethodsThe study is based on a population based sample from Finland consisting of 1667 mothers and 1498 fathers from the Child-sleep birth cohort. We evaluated both the core symptoms of insomnia (sleep onset problems, nocturnal awakenings, too-early awakenings, and poor sleep quality) and the presence of insufficient sleep. Insufficient sleep was defined as a two-hour difference between self-assessed sleep need and reported sleep duration, or sleep duration shorter than six hours per night.ResultsWe found that symptoms of insomnia were more prevalent among women than among men (9.8% vs. 6.2%), whereas sleep debt was less prevalent among women than among men (4.5% vs. 9.6%). Overall, 11.8% of the women and 14.9% of the men reported either significant insomnia or short sleep. Symptoms of insomnia were related to symptoms of depression both among women and men (AOR 3.8, 95% CI 2.6–5.6 vs. AOR 1.9, 95% CI 1.1–3.2), while short sleep was related to depression among women (AOR 3.3, 95% CI 1.8–5.8), and to low education, poor health and a larger number of children among men.ConclusionsThe study showed that insomnia and sleep insufficiency are prevalent among women and men during pregnancy. The findings underline the impact of insomnia to both maternal and paternal health during pregnancy as well as to the implementation of effective interventions to prevent negative consequences of sleep disturbances.     

Associations between pain,objective sleep efficiency and cognition in patients with implantable cardioverter defibrillators

IntroductionPatients with implantable cardioverter defibrillators (ICDs) frequently experience sleep disruption. Prior work shows associations between objective (actigraphic) sleep and cognition in these patients, but whether pain affects associations between measures of sleep fragmentation (eg, sleep efficiency, SE) and cognition is unknown. The present study examined independent and interactive associations between objective SE and pain on cognitive performance in patients with ICDs.MethodsA total of 37 patients with ICDs (M_age = 60.0, SD = 12.4) and self-reported sleep disturbance completed 14 days of actigraphy. Average SE was computed [(average total sleep time/average time in bed) × 100%]. Patients completed the Short Form 36 Health Survey pain section, and computerized tasks measuring executive functioning (letter series, N-Back task), sustained attention/processing speed (symbol digit modalities test, SDMT), and simple reaction time. Multiple linear regressions examined whether SE independently predicted or interacted with pain ratings to predict cognitive performance.ResultsSE interacted with pain to predict SDMT performance, accounting for 12% unique variance. In patients reporting worse pain, higher SE was associated with better SDMT performance. Similar patterns of association on SDMT were not observed in patients with average or low pain. SE and pain ratings did not independently predict SDMT performance. Performance on other cognitive tasks was not associated with any predictors.ConclusionBetter sleep efficiency may play an important role in improving sustained attention/processing speed in patients with ICDs and perceived severe pain. Future research should examine whether interventions aimed at improving sleep fragmentation provide benefit to lower order cognition, particularly in patients with worse pain.     

Cognitive performance and sleep quality in the elderly suffering from chronic insomnia. Relationship between objective and subjective measures

OBJECTIVE: The objective of the present study was to evaluate the relationship between objective and subjective sleep quality and objective and subjective evaluation of cognitive performance in older adults suffering of chronic insomnia (using or not benzodiazepines, BZs) or self-reported good sleepers. METHODS: Three groups of participants 55 years and older were evaluated: 20 insomnia sufferers using BZs chronically, 20 drug-free insomnia sufferers and 20 good sleepers. Objective sleep (PSG) and subjective sleep (sleep diaries, SD) were measured. Objective measures of cognitive performance (attention/concentration, verbal/visual memory, executive function and psychomotor speed) and subjective perception of daily performance were evaluated. RESULTS: Correlational analysis revealed that objective and subjective measures of daytime performance are differentially related to sleep quality for the three groups. An objective good night of sleep is associated with better cognitive performance in good sleepers and drug-free individuals. On the other hand, the impression of having slept well is related to better cognitive performance in good sleepers and chronic insomnia sufferers using BZs. CONCLUSION: Daytime performance and sleep quality are related, but differently so for a good sleeper, an insomnia sufferer without treatment, or one using BZs to alleviate sleep difficulties.     

慢性原发性失眠患者主客观睡眠质量差异及相关因素

背景慢性失眠患者由于警觉性和浅睡比例较高,常判断不清入睡与觉醒的界限,表现为对失眠特别是入睡困难和睡眠时间不足的严重程度常有夸大,即使使用药物改善睡眠后也有同样的表现,而原发性失眠患者伴有明显的心身症状。因此我们观察患者主观与客观睡眠质量的差异与焦虑症状之间的关系,初步了解影响慢性原发性失眠患者主客观睡眠差异的相关因素。方法共收录慢性失眠患者55例,男24例,女31例。符合美国精神障碍诊断与统计手册第4版(DSM-IV)原发性失眠症诊断标准,采用病程超过6个月为慢性失眠。排除患有符合DSM-IV轴I障碍诊断标准的精神障碍者及明显躯体疾病者。收录正常对照组共15名,男8名,女7名。其中性别及年龄与患者组差异无统计学意义,排除有超过1周失眠主诉者及患有符合DSM-IV轴I精神障碍诊断标准的精神障碍者及明显躯体疾病者。所有受试者完成匹兹堡睡眠质量指数表(Pittsburgh sleep quality index,PSQI)、状态-特质焦虑问卷(STAI)、一般情况调查表及在多导睡眠仪监测前3d连续的睡眠日记;并在睡眠监测前晚进行一夜的预睡。结果①分析显示,秩和检验分析显示,慢性原发性失眠患者的无论主观或客观入睡潜伏期、睡眠时间及睡眠效率均小于正常对照组[分别是主观睡眠时间为(157.8±141.7)minv.s(423.4±42.8)min,P<0.001;客观睡眠时间为(332.2±154.7)minv.s(418.1±47.8)min,P=0.009;主观入睡潜伏期为(80.3±73.7)minv.s.(19.2±8.6)min,P<0.001;客观睡眠潜伏期为(23.2±25.4)minv.s.(7.7±4.7)min,P=0.017;主观睡眠效率为(0.52±0.27)v.s.(0.91±0.05),P<0.001;客观睡眠效率为(0.67±0.28)v.s.(0.90±0.07),P<0.001]。②秩和检验分析显示,慢性失眠患者主观睡眠潜伏期大于PSG监测值[(80.3±73.7)minv.s.(23.2±25.4)min,P<0.001],主观睡眠时间、睡眠效率低于PSG监测值[分别为(157.8±141.7)minv.s.(332.2±154.7)min,P<0.001;(0.52±0.27)v.s.(0.67±0.28),P<0.001];而正常对照组除在主、客观睡眠潜伏期存在差异[(19.2±8.6)minv.s.(7.7±4.7)min,P=0.019]外,其他观察值均无明显差异。③患者主观与客观睡眠潜伏期差值与STAI总分、TAI及SAI分呈正相关(r分别为0.402、0.374及0.397,P<0.05),而与病程、性别及年龄无明显相关性;主客观睡眠效率差值与STAI各项目分及病程、性别、年龄无显著相关性。结论慢性原发性失眠患者存在过分夸大失眠严重程度的倾向,主客观睡眠时间、睡眠效率与入睡潜伏期均有明显的差别,其主客观睡眠潜伏期的差异与患者的特质焦虑水平及状态焦虑水平呈正相关。提示焦虑症状在其主客观睡眠质量差异中起到关键的作用。     

Tired telomeres: Poor global sleep quality,perceived stress,and telomere length in immune cell subsets in obese men and women

Poor sleep quality and short sleep duration are associated with increased incidence and progression of a number of chronic health conditions observed at greater frequency among the obese and those experiencing high levels of stress. Accelerated cellular aging, as indexed by telomere attrition in immune cells, is a plausible pathway linking sleep and disease risk. Prior studies linking sleep and telomere length are mixed. One factor may be reliance on leukocytes, which are composed of varied immune cell types, as the sole measure of telomere length. To better clarify these associations, we investigated the relationships of global sleep quality, measured by the Pittsburgh Sleep Quality Index (PSQI), and diary-reported sleep duration with telomere length in different immune cell subsets, including granulocytes, peripheral blood mononuclear cells (PBMCs), CD8+ and CD4+ T lymphocytes, and B lymphocytes in a sample of 87 obese men and women (BMI mean = 35.4, SD = 3.6; 81.6% women; 62.8% Caucasian). Multiple linear regression analyses were performed adjusting for age, gender, race, education, BMI, sleep apnea risk, and perceived stress. Poorer PSQI global sleep quality was associated with statistically significantly shorter telomere length in lymphocytes but not granulocytes and in particular CD8+ T cells (b = −56.8 base pairs per one point increase in PSQI, SE = 20.4, p = 0.007) and CD4+ T cells (b = −37.2, SE = 15.9, p = 0.022). Among separate aspects of global sleep quality, low perceived sleep quality and decrements in daytime function were most related to shorter telomeres. In addition, perceived stress moderated the sleep-CD8+ telomere association. Poorer global sleep quality predicted shorter telomere length in CD8+ T cells among those with high perceived stress but not in low stress participants. These findings provide preliminary evidence that poorer global sleep quality is related to telomere length in several immune cell types, which may serve as a pathway linking sleep and disease risk in obese individuals.     

青少年失眠状况和睡眠质量及二者相关性分析

目的调查青少年失眠状况和睡眠质量及二者之间的相关性。方法对技工学校学生统一发放4733份调查问卷,最终获得有效问卷3342份,记录社会人口学资料,包括性别、年龄、身高、体重、健康状况、户籍、是否为独生子女、父母受教育程度、家庭收入、学习压力、吸烟和饮酒等,以及睡眠和情绪相关量表评分,包括失眠严重指数(ISI)中文版、匹兹堡睡眠质量指数(PSQI)、Epworth嗜睡量表(ESS)、焦虑自评量表(SAS)和Beck抑郁量表(BDI)。结果 3342名青少年中存在失眠997例(29.83%)、日间嗜睡568例(17.00%)、焦虑243例(7.27%)和抑郁1287例(38.51%)。根据ISI中文版评分分为非失眠组(2345名)和失眠组(997例),失眠组女性(P=0.000)、健康状况不良(P=0.000)、非独生子女(P=0.006)、有学习压力(P=0.000)和吸烟(P=0.027)比例,以及ISI中文版评分(P=0.000)、ESS评分(P=0.000)、SAS评分(P=0.000)和BDI评分(P=0.000)均高于非失眠组。Pearson相关分析显示,ISI中文版评分和PSQI评分均与ESS评分(r=0.361,P=0.000;r=0.064,P=0.000)、SAS评分(r=0.326,P=0.000;r=0.069,P=0.000)和BDI评分(r=0.529,P=0.000;r=0.067,P=0.000)呈正相关,且ISI中文版评分的上述相关性(r=0.300～0.600)高于PSQI评分(r0.100)。进一步偏相关分析显示,ISI中文版评分与PSQI评分呈负相关(r=-0.056,P=0.001)。结论失眠组女性更多、健康状况更差、非独生子女更多、学习压力更大、吸烟比例更高,以及日间嗜睡、焦虑和抑郁更严重。与PSQI量表相比,ISI量表中文版与日间嗜睡、焦虑和抑郁的关系更紧密,可能更适用于筛查和评价青少年失眠状况。     

The impact of sleep on adolescent depressed mood,alertness and academic performance

The present study developed and tested a theoretical model examining the inter-relationships among sleep duration, sleep quality, and circadian chronotype and their effect on alertness, depression, and academic performance. Participants were 385 adolescents aged 13–18 years (M = 15.6, SD = 1.0; 60% male) were recruited from eight socioeconomically diverse high schools in South Australia. Participants completed a battery of questionnaires during class time and recorded their sleep patterns in a sleep diary for 8 days. A good fit was found between the model and the data (χ²/df = 1.78, CFI = .99, RMSEA = .04). Circadian chronotype showed the largest association with on adolescent functioning, with more evening-typed students reporting worse sleep quality (β = .50, p < .001) and diminished alertness (β = .59, p < .001). Sleep quality was significantly associated with poor outcomes: adolescents with poorer sleep quality reported less sleep on school nights (β = −.28, p < .001), diminished daytime alertness (β = .33, p < .001), and more depressed mood (β = .47, p < .001). Adolescents with poor sleep quality and/or more evening chronotype were also more likely to report worse grades, through the association with depression. Sleep duration showed no direct effect on adolescent functioning. These results identified the importance of two lesser-studied aspects of sleep: circadian chronotype and sleep quality. Easy-to-implement strategies to optimize sleep quality and maintain an adaptive circadian body clock may help to increase daytime alertness, elevate mood, and improve academic performance.