Circadian Preference Research Articles

Influence of circadian preference, sleep inertia and their interaction on marathon completion time: A retrospective, cross-sectional investigation of a large mass-participation city marathon.

Burgeoning interest in marathons necessitates an understanding of performance determinants. Research has highlighted the importance of diet, training and sleep, yet relations of circadian preference and sleep inertia with marathon performance remain largely unexplored. Because marathons generally start early-to-mid morning, these characteristics may have relevant impact. This study investigates relationships of circadian preference, sleep inertia and their interaction with marathon completion time. Consenting participants in a 2016 large mass-participation city marathon completed self-report questionnaires capturing circadian preference and sleep inertia, along with demographics and other characteristics. Circadian preference and sleep inertia were described across subgroups. Analyses examined the associations and interactions of circadian preference and sleep inertia with marathon completion times, with adjusted analyses accounting for age, sex and sleep health. Participants were marathon finishers (n = 936; 64.5% male; 66.3% young-adults), with a majority reporting morningness tendencies (60.8%). Results supported a linear association between increasing eveningness preference with slower marathon times (p = 0.003; padjusted = 0.002), while some support was provided for a linear relationship between greater sleep inertia and slower marathon times (p = 0.04; padjusted = 0.07). A significant interaction was observed (p = 0.02; padjusted = 0.01), with the directionality suggesting that the circadian preference relationship weakened when sleep inertia severity increased, and vice-versa. Our results suggest deleterious associations of increasing eveningness preference and greater sleep inertia with marathon completion time. These features may aid identifying marathoners who could be at a disadvantage, while also serving as modifiable targets for personalized training regimens preceding competition.

Comparison of chronotype and learning motivation in medical university students

BackgroundPeople differ in their preferred time for intellectual activities. Morningness-eveningness preferences describe the preferred time for performing daily activities and are determined by chronotype. Chronotype reflects circadian preference in humans and is divided into morning, intermediate, and evening types. Learning motivation is a key predictor of student success and may influence learning and study, academic performance, intention to continue medical research, and well-being. Helping students develop learning motivation may improve their educational achievement and health. There are opposing studies regarding chronotype and academic achievement. We hypothesized that chronotype affects the learning motivation of medical school students.MethodsWe used the reduced Morningness-Eveningness Questionnaire (rMEQ), and the Motivated Strategies for Learning Questionnaire (MSLQ) for Russian, Polish, Japanese, and Australian students in the first and second years of medical university. A total of 540 medical students answered the questionnaires. The MSLQ contains six subscales: intrinsic goal orientation, extrinsic goal orientation, self-efficacy for learning and performance, control of learning beliefs, task value, and test anxiety.ResultsThe rMEQ was used to classify the students into three types, which were morning (26.7%), intermediate (60.5%), or evening chronotypes (12.7%) based on their scores. The learning motivation scores for the intrinsic and extrinsic goal orientations, task value, and self-efficacy were lower in evening chronotypes.ConclusionsOur findings suggest that the evening chronotype had a lower learning motivation than the morning chronotype. Evening-oriented students may need a more flexible schedule, and a shift of the most important courses in the university to the afternoon may help them to attain higher motivation for learning medicine.

Effect of morningness-eveningness chronotype on academic performance of undergraduate students

BackgroundCircadian rhythms are crucial for physiological functioning, and they vary among people. There are three distinct chronotypes: morning, evening, and neither type. Morning types experience their highest level of activation during the early part of the day and tend to be more conscientious and focused on achieving their goals. Evening types, on the other hand, reach their peak performance during the latter portion of the day and exhibit a higher level of intelligence. University class schedules may occasionally clash with evening-type individuals’ circadian preferences, potentially impacting their academic performance in comparison to their morning-type peers. Therefore, this study was done to investigate if morningness-eveningness can affect college students’ academic performance as sleeping late or sleep deprivation can lead to disease in the young population.Materials and methodsA sample of 100 collegiate students aged 18–30 years were recruited via convenience sampling from Jamia Hamdard, Delhi, and informed consent was obtained from the subjects. The morningness-eveningness questionnaire (MEQ) was used to assess students’ chronotype, and the mean of the last three academic years percentage was used to assess the academic performance of the students.ResultsThe total academic performance score was better in the morning category (75.53 ± 7.28) as compared to the evening (66.42 ± 10.08) and intermediate (73.72 ± 6.46) categories. There was a low degree of positive correlation between total academic performance and TMEQ (total morning-evening questionnaire) score (ρ = 0.204).ConclusionThe academic performance of morning chronotype students was better than that of evening chronotype students.

The relationship between chronotype and treatment time of day on post-treatment depression symptom severity for depressed patients receiving cognitive behavioural therapy

BackgroundMajor depressive disorder (MDD) represents a serious public health problem that affects a quarter billion individuals worldwide. Consequently, there is a need to identify modifiable factors of services that support treatment success. The relationship between circadian preferences (i.e., chronotype), treatment time of day, and outcomes is an understudied research area. Executing optimal treatment timing based on these factors could lead to substantial returns on a modifiable variable. MethodThe present study evaluated the associations between chronotype and treatment time of day on post-treatment depression symptom severity. In a tertiary setting, outpatients with MDD (n = 227) received 14 sessions of cognitive behavioural therapy in a group format, at one of three time of days: morning, afternoon, or evening. Participants completed measures of depression and chronotype at baseline and post-treatment. ResultStatistically significant increases in morningness were found for the afternoon and evening groups, but not the morning group. There was no significant interaction effect between pre-treatment morningness-eveningness scores and treatment time of day on post-treatment depression scores nor treatment response. However, there was a significant interaction effect of change in morningness-eveningness scores and post-treatment depression severity in the afternoon group. LimitationsThe lack of a control group limits conclusions drawn. ConclusionThe results suggest that individual circadian phase may impact treatment outcomes in relation to time of day. Further intentionally designed research is warranted to improve understanding of predictors, moderators, and mediators of patient outcomes based on treatment time of day and circadian phase and amplitude.

Association between chronotype, social jetlag, sleep quality, and academic burnout among nursing students: A cross-sectional study

ABSTRACT Academic burnout in nursing students is a serious problem worldwide that results in emotional exhaustion, cynicism and low professional efficacy. The aim of the current study was to examine the association between sleep quality and circadian rhythm indicators and academic burnout among Iranian nursing students. This cross-sectional study was conducted on 325 undergraduate nursing students studying at Qazvin University of Medical Sciences between November and February 2023. Data collection was carried out using self-report questionnaires including demographic characteristics, The Pittsburgh Sleep Quality Index (PSQI), reduced-Morningness-Eveningness Questionnaire (r-MEQ), and the Maslach Burnout Inventory-Student Survey (MBI-SS). Social jetlag (SJL) was defined as the absolute value of the difference between the midpoint of sleep on free days (MSF) and the midpoint of sleep on workdays (MSW). Data were analyzed using univariate and multivariate linear regression models. About 31.4% of participants had evening chronotype and almost half of them suffered from poor sleep quality. About 47.7% of the participants had SJL ≥ 2 h. In the multivariate linear regression model, students with evening chronotype compared to morning chronotype experienced more academic burnout in emotional exhaustion, cynicism and professional efficacy. PSQI score was only correlated with emotional exhaustion and cynicism subscales. Increased SJL was a predictor on all three subscales of academic burnout. The findings suggested that evening chronotype, poor sleep quality, and high SJL were associated with increased likelihood of academic burnout in nursing students. Assessment of circadian preference and sleep quality is beneficial for timely identification and prevention of academic burnout in nursing students.

Chronotype and lifestyle in the transition to adulthood: Exploring the role of sleep health and circadian misalignment

ObjectivesThe present study aimed at exploring the association between eveningness and lifestyle-related variables, that is, body mass index, alcohol, and cigarette consumption, in adults (18-40years), focusing on the possible moderator effect of age and the role of sleep disturbances and circadian misalignment (social jetlag). MethodsA web-based survey was administered to 437 participants, covering demographics, lifestyle-related variables, chronotype, sleep quality, and daytime sleepiness. A subset of 206 participants wore a wrist actigraph for a week, allowing the creation of a sleep health index within the RU-SATED framework. Regression analysis was used to investigate the associations between chronotype and lifestyle-related outcomes, accounting for social jetlag and sleep health; and to explore the lifestyle trajectories over time. ResultsEvening chronotypes showed higher body mass index levels, consumed more alcohol, and smoked more cigarettes than other circadian typologies, in particular after 25 years of age. Poor sleep health and social jetlag significantly contribute to explaining evening types smoking behavior, while not affecting body mass index levels. Social jetlag plays a more important role compared to sleep disturbances and eveningness in predicting more detrimental drinking and smoking behavior. ConclusionsParticipants who maintain the evening trait past the age of 25years are more prone to adopt an unhealthy lifestyle, especially if experiencing poor sleep health and circadian misalignment. Circadian preferences and sleep health should be considered when planning interventions aimed at promoting healthy lifestyles in adults aged 18-40years. Further investigations should explore the effect of modifications in lifestyle in the prevention of noncommunicable diseases.

Exploring the nexus between sleep, chronotype, and non-cognitive predictors in university students: Implications for academic success

ABSTRACT While the association between sleep-related variables and academic achievement is widely acknowledged, limited attention has been directed towards exploring non-cognitive predictors of academic achievement such as conscientiousness and self-regulation. In this study, we investigated the relationships between various sleep-related factors (circadian preference, chronotype, sleep duration, quality, and irregularity) and non-cognitive predictors (conscientiousness, self-regulation, self-efficacy, and achievement motivation) in 637 university students. Bivariate analyses revealed moderate to strong correlations among several sleep-related measures. Notably, distinctness, representing the subjective perception of daily changes, and daytime sleepiness exhibited negative associations with self-regulation, while high sleep quality was positively linked to robust self-regulation. These findings emphasize the importance of exploring various measures, particularly distinctness within circadian typology. Furthermore, we discuss the potential integration of sleep intervention programs with strategies aimed at enhancing self-regulation.

Lifetime prevalence and characteristics of sleep paralysis in Italian university students population

Sleep paralysis (SP) is a REM-related parasomnia, characterized by the inability to perform voluntary movements. It is a relatively widespread phenomenon in the general population and, although usually not dangerous, it is experienced with intense fear. The current study aims to evaluate the lifetime prevalence and characteristics of SP in the Italian student population. The study was conducted online, through an online battery of questionnaires. We used the Unusual Sleep Experience Questionnaire to investigate the prevalence of the disorder and the typical characteristics, metacognitive beliefs on the episodes, and previous distress factors. We also collected information about anxiety and depression symptomatology, sleep quality, and circadian preferences. Four hundred and thirty-two participants (333 F, 22.8 ± 2.57 y) took part in the study and 37.5 % of them reported having experienced at least one SP episode in their lifetime. On a physiological level, the most common features were the inability to speak followed by a tingling sensation and the inability to open the eyes, consistent with REM muscle atonia. Cognitive features during episodes include the perception of a presence in the room, followed by the fear of dying. Participants who reported SP had higher anxiety and worse sleep quality, and were more associated with evening chronotypes compared to non-SP responders. Our results show that SP is generally widespread in Italian students, in line with the prevalence reported in previous studies. Further studies could investigate the effects of suggested therapies to decrease the number of episodes of the disorder, especially in those who experience it recurrently.

Later ("evening") circadian preference is associated with poorer executive, academic, and attentional functioning in adolescents with and without ADHD.

Adolescents vary considerably in their circadian phase preference; those with greater "eveningness" (also known as "night owls") have later bedtimes, wake times, and peak arousal compared to those with greater "morningness." Prior research suggests that (a) greater eveningness is associated with worse academic, executive, and attentional functioning; and (b) adolescents with attention-deficit/hyperactivity disorder (ADHD) tend to be high in eveningness and to have deficits in these school-related constructs. However, few studies have examined circadian preference alongside two potential confounds-sleep duration and sleep quality-as predictors of daytime functioning, or whether the strength of associations differs across adolescents with and without ADHD. Participants were 302 adolescents (Mage = 13.17 years; 44.7% female; 81.8% White); approximately half (52%) had ADHD. A multi-method, multi-informant design was used. Specifically, adolescents reported on their circadian preference, school night sleep duration, and sleep quality. Adolescents provided ratings of their academic motivation (intrinsic, extrinsic, and amotivation) and were administered standardized achievement tests in reading and math. Adolescents and parents completed ratings of daily life executive functioning (behavioral, emotion, and cognitive regulation), and they and teachers also provided ratings of ADHD inattentive symptoms. Above and beyond sleep duration, sleep quality, and covariates (sex, family income, pubertal development, medication use), greater eveningness was uniquely associated with poorer academic, executive, and attentional functioning across most measures. Sleep quality was uniquely associated with a handful of outcomes, and sleep duration was not significantly uniquely associated with any outcome in the regression analyses. ADHD status did not moderate effects. This study provides compelling evidence that poorer academic, executive, and attentional functioning are more closely associated with greater eveningness than with sleep duration or quality in adolescents. Findings suggest that targeting circadian preference may be important to reduce these problems in adolescents, especially in clinical samples such as ADHD for whom academic, executive, and attentional difficulties are exceptionally common.

Gender and circadian preferences influence emotions and motivation in secondary mathematics classrooms

ABSTRACT Many studies have reported poor school achievement in evening persons and general circadian fluctuations in cognition. The aim of this study was to analyze circadian fluctuations in a cross-sectional design and examine the effects of chronotype on situational emotions and intrinsic motivation. A cross-sectional survey study was conducted in three Turkish secondary schools with a total sample of 599 students (283 females and 316 males). Data were collected at the end of specific math lessons of the same grade level and content, using a form combining three scales. We found no gender-related differences in intrinsic motivation, while there were some differences in situational motivation. In math classes, female students exhibited higher level of interest, while boys scored higher on boredom. In addition, students who scored high on morning affect reported higher levels of interest, well-being, and less boredom. Students with higher stability (and lower fluctuations in mood and cognition during the day) reported a higher degree of enjoyment, perceived competence, perceived choice, and less pressure/tension in their math lessons. A positive association was observed between distinctness, interest, and well-being, while negative correlations existed between distinctness and boredom. This suggests that students with higher diurnal stability reported a higher level of interest, well-being, and a lower level of boredom. Additionally, the results of the analyses showed that morningness, distinctness, and eveningness were significant predictors of intrinsic motivation. Conversely, gender, time of application, morningness, and distinctness emerged as predictors for situational emotions in mathematics classes.

Associations between circadian preference, social jetlag, and diabetes mellitus risk in nurses working shifts

Associations between circadian preference, social jetlag, and diabetes mellitus risk in nurses working shifts

Sleep Quality of Heavy Vehicles’ Professional Drivers: An Analysis Based on Self-Perceived Feedback

Abstract Introduction Sleep is a crucial biological need for all individuals, being reparative on a physical and mental level. Driving heavy vehicles is a task that requires constant attention and vigilance, and sleep deprivation leads to behavioral and physiological changes that can develop sleep disorders which can put lives at risk. Objectives The main objectives of this study are to describe and evaluate sleep quality, excessive daytime sleepiness, circadian preference, and risk of suffering from obstructive sleep apnea in a population of Portuguese professional drivers. Methods To fulfill the objectives, 43 Portuguese professional drivers, between 23 and 63 years old, answered validated questionnaires: Epworth Sleepiness Scale, Morningness–Eveningness, Stop-Bang Questionnaire, and Pittsburgh Sleep Quality Index. Results Results indicated that older drivers tend to experience higher daytime sleepiness (11 ± 3.4; p = 0.002) and obstructive sleep apnea risk (4.5 ± 1.5; p = 0.03). Regarding sleep quality, the majority of drivers were classified with poor sleep quality (74.4%). It was possible to infer statistical differences between groups based on body mass index (p = 0.037), the type of route (p = 0.01), and physical activity (p = 0.005). Conclusion Drivers have an indifferent circadian preference and small-course drivers have a worse sleep health perception. Therefore, it is essential to implement prevention programs, promoting the basic rules for better sleep quality as well as identifying sleep disorders to minimize possible road accidents.

Exploring the Link Between Women's Sleep, Daily Rhythms, and Mental Health in Women Across Different Stages of Life

This research article delves into the intricate connection between women's sleep behaviors, daily rhythms, and mental well-being across different stages of life. Utilizing a comprehensive literature review and empirical data analysis, it examines how variations in sleep quality, circadian preferences, and mental health outcomes manifest in women from adolescence through adulthood and into older age. The study sheds light on the nuanced interactions between these factors and offers insights into potential interventions to promote better sleep hygiene and mental health support tailored to women's specific life stages.

Association between sleep quality and habits of electronic media use among young adults with different circadian typology

Background: Circadian preference refers to individual differences for mental and physical activity in the morning and evening. We hypothesized, that inadvertent use of electronic media can cause circadian misalignment that influences sleeping habits and sleep quality of young adults. Aims and Objectives: The aim of the study was to investigate the effect of circadian preferences on sleeping habits and the association of electronic media use with sleep quality and sleep disturbances. Materials and Methods: A total of 188 subjects were enrolled and divided into three groups: Evening, intermediate, and morning chronotype based on the Morningness-Eveningness score. Electronic media use at bedtime and duration of use were assessed subjectively. Sleep quality and subjective sleep disturbances, daytime sleepiness, and chronotype were assessed by the Pittsburgh Sleep Quality Index, Epworth Sleepiness Score, and Morningness-Eveningness Questionnaire Self-assessment version, respectively. Results: The majority of subjects with the evening chronotypes suffered from poor sleep quality compared to other chronotypes and the difference was statistically significant. In evening-type subjects, electronic media use at bedtime, long sleep latency, short sleep duration, and daytime sleepiness were significantly associated with poor sleep quality with odds ratios of 2.34 (1.08–5.08), 11.42 (4.98–26.19), 8.54 (1.01–68.24), and 1.68 (1.03–2.73), respectively. Conclusion: The majority of evening-type subjects had poor sleep quality, altered sleeping habits, and electronic media use at bedtime is significantly associated with poor sleep quality. Hence, history regarding sleep habits and lifestyle, especially electronic media use, should be taken from young adults, who are coming to the outpatient department for other than sleep disorders, to prevent the development of health-related problems.

Shift schedules and circadian preferences: the association with sleep and mood.

We explored the circadian preferences of non-shift workers (non-SWs) and various types of shift workers (SWs), and the associations of these preferences with sleep and mood. In total, 4,561 SWs (2,419 women and 2,142 men aged 37.00 ± 9.80 years) and 2,093 non-SWs (1,094 women and 999 men aged 37.80 ± 9.73 years) completed an online survey. Of all SWs, 2,415 (1,079 women and 1,336 men aged 37.77 ± 9.96 years) reported regularly rotating or fixed schedules ("regular SWs"), and 2,146 (1,340 women and 806 men aged 36.12 ± 9.64 years) had irregular schedules ("irregular SWs"). Of the regular SWs, 2,040 had regularly rotating schedules, 212 had fixed evening schedules, and 163 had fixed night schedules. All participants completed the Morningness-Eveningness Questionnaire (MEQ) exploring circadian preferences, the short form of the Center for Epidemiological Studies-Depression Scale (CES-D) evaluating depression, the Insomnia Severity Index (ISI), and the Epworth Sleepiness Scale (ESS). Compared to non-SWs, SWs had lower MEQ scores, i.e., more eveningness, after controlling for age, gender, income, occupation, and weekly work hours (F = 87.97, p < 0.001). Irregular SWs had lower MEQ scores than regular SWs (F = 50.89, p < 0.001). Among regular SWs, the MEQ scores of fixed evening and fixed night SWs were lower than those of regularly rotating SWs (F = 22.42, p < 0.001). An association between the MEQ and ESS scores was apparent in non-SWs (r = -0.85, p < 0.001) but not in SWs (r = 0.001, p = 0.92). SWs exhibited more eveningness than non-SWs; eveningness was particularly prominent in SWs with irregular or fixed evening/night shifts. Eveningness was associated with sleepiness only in non-SWs, but not in SWs.

Higher education enrollment as a risk factor for somnolence and hypersomnolence

This study aimed to compare the prevalence of somnolence and hypersomnolence between a higher education student and non-student sample. Hershner and Chervin [Hershner in Nat sci sleep 10.2147/NSS.S62907, 2014] defined somnolence as lapses into drowsiness, consequently leading to the inability to maintain alertness. This definition aligns with the American Academy of Sleep Medicine's (AASM) definition [Berry in Am Acad Sleep Med 176:2012, 2012]. Hypersomnolence differs from this, as suggested by Lammers et al. [Lammers in Sleep Med Rev 52, 101306, 2020], and refers to the experience of excessive daytime sleepiness. It is commonly observed that individuals enrolled in higher education courses often experience somnolence and hypersomnolence; however, it is currently unclear whether this is more prevalent in students compared to the general population. An online survey was administered to 202 participants measuring somnolence, hypersomnolence, sleep quality, sleep efficiency, sleep disturbance, sleep duration, circadian preference, and daytime dysfunction. 94 participants were non-students, and 108 were enrolled in higher education. Significant differences were found between student and non-student samples for somnolence but not for hypersomnolence. Furthermore, within the non-student sample a multiple linear regression demonstrated that hypersomnolence was predicted by daytime dysfunction. The results suggest that there are differences in the predictors of somnolence and hypersomnolence between a student and non-student sample. Consequently, this study highlights that students experience hypersomnolence and somnolence differently to their non-student counterparts. Thus, warranting the need for further investigating within this unique population.

The influence of chronotype on temporal patterns of eating and diet composition in shift and non-shift workers

When and what you eat can be linked to circadian preference (i.e., chronotype) and occupation (e.g., shift worker). Evening chronotypes, with a later circadian preference, tend to have meals later, distribute energy intake toward the end of the day(1), and more unhealthy eating habits than morning chronotypes(2); whereas night shift work is associated with later mealtimes and poor diet quality as a result of circadian disruption due to their work(3). What is unclear is whether chronotype influences the occupation-induced dietary patterns observed in shift workers. This study aimed to investigate associations between chronotype, temporal patterns of eating and diet composition in shift and non-shift workers. Adults from shift (SW) and non-shift (N-SW) populations were recruited. A Chrononutrition Questionnaire captured chronotype, duration of eating window (DEW), time of first eating occasion (FEO) and last eating occasion (LEO) while diet composition (energy, protein, total fat, saturated fat, carbohydrate, fibre, alcohol) was extracted from 7-day food diaries. Associations between chronotype and DEW/FEO/LEO, and between DEW/FEO/LEO and diet composition were determined by Spearman Rank Coefficients. 95 participants were enrolled (N-SW: n = 39; SW: n = 56); predominantly female (71%), morning chronotype (37%), on average 40.46 ± 15.08 years with BMI of 27.04 ± 5.77kg/m2. 84 returned food diaries. Later chronotype was positively associated with later times of FEO (N-SW: r = ,50, SW: r = ,69) and LEO (N-SW: r = ,63, SW: r = ,54) on free (non-work) days (p≤.002), and longer DEW (r = ,42) and later LEO (r = ,60) on workdays for non-shift workers (p&lt;.01). However, there were no significant differences in diet composition by day/shift type between chronotypes across the study population. On afternoon shifts, longer DEW was associated with greater energy (r = ,60) and total fat intake (r = ,60) and later LEO with greater alcohol intake (r = ,59) (p&lt;.05). On night shifts, a longer DEW was associated with lower alcohol intake (r=-.45, p&lt;.05). Amongst non-shift workers, later FEO was associated with lower fibre intake on workdays (r=-.58, p&lt;.001). Additionally, non-shift workers who were later chronotypes had later LEO, which on workdays associated with lower fibre (r=-.45) and alcohol intake (r=-.43); and on work-free days, associated with lower alcohol intake (r=-.45) (p&lt;.05). Not surprisingly, evening chronotypes across the study population had longer and/or later eating windows on work-free days (i.e., free of constraints), as did non-shift workers on workdays, while the influence of chronotype on DEW, FEO, and LEO across shifts were less clear. Hence, for shift workers, occupation appeared to be a greater driver of temporal eating patterns than chronotype. Additionally, later eating times of evening chronotypes was not associated with negative diet composition. The exception was lower fibre intake amongst non-shift workers; but regardless of chronotype, shift workers may benefit from having a shorter and earlier DEW on afternoon shifts to minimise energy, fat, and alcohol intake.

Circadian Preferences and Coping Styles to Stressful Life Events in Depression Patients

IntroductionDepressive disorder is a common public health problem that significantly impairs quality of life and has a high risk of mortality and morbidity.ObjectivesThe aim of this study was to investigate circadian rhythm differences, stressful life events and coping styles in patients with depression.MethodsThe study involved 100 participants, including 50 patients with depression and 50 healthy controls, recruited from the psychiatric clinic of one-university hospital. The participants completed a sociodemographic information form, Beck Depression Inventory (BDI), Life Events Checklist (LEC-5), Coping Inventory for Stressful Situations-Short Form (CISS-21) and Morningness-Eveningness Questionnaire (MEQ).Results The mean age of the patients with depression was 31.88±10.6 years, and the control group was 29.84±8.02 years. There were no significant relationships between the variables including gender and some other sociodemographic characteristics except education level. There were significant differences between the depression and control groups in terms of coping styles for stressful life events. Emotional coping was significantly higher in patients with depression compared to the control group, whereas task-oriented coping was significantly lower than the control group (p&lt;0.05). The majority of both depression and the control group consisted of intermediate type. Natural disasters, severe suffering, and other stressful events or experiences were more frequent stressful life events in the depression group. Task-oriented coping scores and emotional coping scores showed significant discrimination with sensitivity and specificity values.ConclusionsRecognizing stressful life events and the coping strategies used to deal with them is important for identifying future mental problems such as depression and developing treatment and follow-up plans. Longitudinal studies are needed to fully understand how the reporting of mature and dissociative coping methods interacts with depression in recovery from traumatic events.Disclosure of InterestNone Declared

Abstract 23: Multidimensional Association of Sleep With Health Behaviors and Cardiometabolic Risk in Adolescents

Introduction: Insufficient sleep has been recognized by AHA as part of Life’s Essential 8 in the prevention of cardiovascular disease (CVD). While sleep is a multidimensional phenomenon comprised of duration, efficiency, quality, timing, and regularity, prior epidemiological research in youth has predominantly focused on sleep duration. It is important to disentangle which sleep dimensions most associate with other health behaviors and biomarkers for CVD risk in adolescents. Hypothesis: We hypothesize that specific dimensions of insufficient, disturbed, and misaligned sleep will be differentially associated with nutrition, physical activity, and inflammation. Methods: We analyzed data from 421 population-based randomly-selected adolescents from the Penn State Child Cohort (median 16 years; 47% female; 21% racial/ethnic minority) who had at least 5-night at-home actigraphy (ACT), 1-night in-lab 9-h polysomnography (PSG), self-reported insomnia symptoms, daytimes sleepiness, sleep schedule, circadian preference, and dietary assessment, as well as fasting blood draw assayed for C-reactive protein (CRP), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNFα). Linear regression models tested the independent association of each sleep dimension with caloric intake, ACT-derived sedentary behavior, and blood-based inflammatory biomarkers, while accounting for sex, age, race/ethnicity, and body mass index. Results: Higher ACT-measured night-to-night variability in sleep duration was most strongly associated with increased caloric intake, particularly carbohydrates (B=0.203, p&lt;0.001), while shorter PSG-measured sleep duration was also associated with carbohydrates but to a lesser extent (B=-0.150, p=0.002). Later bedtime on weekdays was most strongly associated with higher bouts of sedentary behavior (B=0.216, p&lt;0.001), while shorter ACT-measured sleep duration was most strongly associated with time spent sedentary (B=-0.226, p&lt;0.001). PSG-measured sleep apnea was most strongly associated with higher CRP (B=0.287, p&lt;0.001) and IL-6 levels (B=0.260, p&lt;0.001), while later bedtime on weekdays (B=0.136, p=0.025) and evening circadian preference (B=-0.124, p=0.017) were also associated with inflammation but to a lesser extent. Conclusions: The association of inadequate sleep with health behaviors and cardiometabolic risk in adolescents is in itself multidimensional. These data support that AHA guidelines should be updated to include insufficient, disturbed, and misaligned sleep as contributors to CVD risk.

Sleep, depression, anxiety, stress and circadian preferences among women in the third trimester. Are these variables related to mother’s expectations about their child’s sleep?

Pregnancy is a period of significant physical and psychological changes. Pregnant women often struggle with poor sleep quality which can increase the risk of developing depression and anxiety. Additional factors can affect sleep quality and vice versa. We focused on an understudied topic: pregnant women`s expectations about how their infant will sleep. This study aims to describe the potential correlates and predictors of women`s sleep quality and their expectations about child sleep in a broader context. In total, 250 women participated in the research. Participants completed questionnaires PSQI, MEQ, DASS-21 and BISQ-R. To verify the set aims, we used Pearson’s correlation coefficient, t-test and general linear model (GLM), including methods for determining the effect size (Hedges’ g, r2, ε2). The results showed that sleep quality is related to circadian preference, depression, anxiety and stress. Women with poor sleep quality were more evening type and scored higher on these variables. Anxiety, circadian preference and the week of pregnancy were the most significant predictors of sleep quality. Women with at least one child and women who did not prepare for childbirth and motherhood and had not encountered information about a child’s sleep scored higher in BISQ-R. A hypothesis can be put forward that sufficient information before childbirth and earlier maternal experiences can affect expectations about a child’s sleep. This hypothesis would need to be verified in future research.