Sleep and development in adolescence in the context of socioeconomic disadvantage

Short-term prospective and reciprocal relations between social anxiety symptoms and sleep quality among community-recruited adolescents

OBJECTIVE

Research conducted with socially anxious youth suggests that there is an increased risk for poor sleep quality; however, this link is not consistent across the few studies and there is evidence to suggest that poor sleep quality may increase the risk for elevated social anxiety symptoms. The present study investigates both prospective and reciprocal associations between levels of self-reported social anxiety and global sleep quality while also distinguishing between within-person and between-person variations in these associations.

METHOD AND MEASURES

Community-recruited adolescents from the United States (N = 71; Mage=16.04, SD = 1.08; 64.8% girls; 80.3% White) completed a battery of questionnaires across three time-points within a six-month period; each wave occurred three months apart. A random-intercepts cross-lagged panel model was used for the analysis.

RESULTS

Findings indicated a positive relation between social anxiety and poor sleep quality at both within- and between-person levels. Higher levels of social anxiety were associated with poorer sleep quality three months later, but the reverse relation was not observed.

CONCLUSIONS

These findings provide evidence supporting the link between elevated social anxiety symptoms and future sleep problems among adolescents and lay groundwork for investigation of mechanisms driving this link. Findings suggests a need to screen for and treat sleep problems in socially anxious youth.

Time trends and predictors of difficulties in getting to sleep among adolescents from six Nordic countries 2002-2018

AIMS

Sleep difficulties among adolescents are of a significant concern given its associations with adverse health outcomes. The aims of the present study were to examine trends and predictors of self-perceived difficulties in getting to sleep among adolescents in the Nordic countries.

METHODS

The study was based on cross-sectional data from 10- to 17- year-olds (N = 139,799) from six Nordic countries (Sweden, Iceland, Norway, Denmark, Greenland, and Finland) participating in the international Health Behaviour in School-aged Children (HBSC) study, collected via six survey rounds in the period 2002-2018.

RESULTS

Since 2002, the prevalence of self-perceived difficulties in getting to sleep has risen in all Nordic countries. However, from 2014 to 2018, the trend of adolescents reporting difficulty more than weekly increased in Denmark, Finland, Greenland, and Norway, whereas it was mostly stable in Sweden, and Iceland showed a reduction. Predictors of difficulties in getting to sleep varied across countries, but younger age, reduced life satisfaction, decreased physical activity, feeling low, and feeling nervous were common predictors across the six countries. Gender and perceived family wealth had different effects on difficulties getting to sleep in different countries.

CONCLUSIONS

Prevalence of and trends in difficulties getting to sleep varied by country, with a concerning rise identified in Greenland, 2006-2018. Predictors such as feeling low, feeling nervous, age, gender, life satisfaction, physical activity, and perceived family wealth varied by country and thus emphasize the need for tailored interventions to address diverse challenges in adolescent sleep health.

Movement Mediates the Relationship Between Socioeconomic Position and Socioemotional Outcomes in Youth

BACKGROUND

Youth from lower socioeconomic positions tend to have poorer socioemotional outcomes, be less physically active, have poorer sleep, and engage in more screen time than their peers from higher socioeconomic positions. The objective of this study was to test the hypothesis that movement behaviors (ie, physical activity, sedentary behavior, and sleep) and changes in combinations of movement behaviors over time (movement trajectories) mediate the relationship between socioeconomic position and socioemotional outcomes in youth.

METHODS

This study used socioeconomic position data, scores from Strengths and Difficulties Questionnaires, and time-use diaries from 980 females and 1014 males (2% Australian Indigenous) aged 10-14 from the Longitudinal Study of Australian Children from 2014 to 2018.

RESULTS

Movement trajectories did not mediate the relationship between socioeconomic position and socioemotional outcomes. Least absolute shrinkage and selection operator-based mediation analyses found males from lower socioeconomic positions participated in less moderate- to vigorous-intensity physical activity than their peers from high socioeconomic positions, partially explaining (7%) more peer problems. Youth from lower socioeconomic positions participated in more recreational screen activities than their peers from higher socioeconomic positions, partially explaining (1%-3%) worse total socioemotional outcomes and conduct (females) and emotional problems (males).

CONCLUSIONS

Future qualitative research should be considered to identify the best ways for youth from lower socioeconomic positions to decrease screen time and increase opportunities to participate in moderate- to vigorous-intensity physical activity in the community, at school, and at home. Other mediators explaining differences in socioemotional outcomes should be explored.

Social determinants of health at multiple socio-ecological levels and sleep health in adolescents: A scoping review

Heightened sleep disturbances occur in adolescence, yet existing research has predominantly focused on individual factors linked to poor sleep and a limited set of sleep outcomes, such as sleep duration and timing. This scoping review aimed to identify the multilevel social determinants of adolescent sleep health across domains, including regularity, satisfaction/quality, alertness/sleepiness, timing, efficiency/continuity, duration, and behavior. Social determinants of health (SDoH) were categorized through a socio-ecological lens, while sleep health domains were aligned with the RU-SATED and Peds B-SATED sleep health frameworks. A systematic database search resulted in 57 studies of non-clinical adolescent and young adult populations (age 10-24 y) in North America, published between 2014 and 2022. Research gaps include 1) absence of other sleep health domains other than duration which is predicated on the included studies using a limited set of sleep outcome measures rather than a more comprehensive measurement strategy that align with the multifaceted domains of sleep health, and 2) inconsistent terminology and/or absent conceptual and operational definitions of subjective sleep reports. The findings highlight the multilevel SDoH that influence adolescent sleep health, underscoring the need for more comprehensive research. Such efforts will facilitate the development of interventions focused on fostering optimal adolescent sleep health this populations.

Affiliative Parent-Adolescent Bedtime and Waketime Interactions are Associated with Adolescent Sleep

OBJECTIVES

The current study examined whether evening and morning affiliation (i.e., warmth) and autonomy (i.e., more or less in charge) around sleep routines predicted adolescent sleep on weekdays.

METHOD

Participants were 28 parent (Mage = 43.19; 85.17% mothers) and adolescent (Mage = 12.34 years) dyads who completed the same electronic diaries morning and evening for 10 days, with a total number of 221 nights observed across dyads. Sleep duration and sleep quality were assessed via the Pittsburgh Sleep Diary; degree of affiliation and autonomy around bedtime and waketime routines were assessed with single items on a visual analog scale. Multilevel modeling was utilized to evaluate the effects of more or less affiliation or autonomy on sleep outcomes (i.e., duration and quality) between and within dyads.

RESULTS

Across all participants, adolescents who reported more affiliative interactions with their parent around bedtime and waketime slept longer and had better sleep quality at night. Further, when adolescents experienced greater than average affiliative interactions with their parent than was typical for them, they had better sleep quality that night. Adolescent sleep quality and duration were not impacted by whether or not adolescents were in charge of their bedtime and waketime routines.

CONCLUSIONS

Findings support parents' role in social and emotional security and highlight the importance of affiliative parent interactions around the sleep period for optimal sleep for young adolescents.

Family income as a moderator of relations between sleep and physical health during adolescence

OBJECTIVES

Sleep duration, quality, and consistency are associated with overall physical health in adolescence, yet the effects of sleep on development may be not uniform because both sleep and physical health vary systematically along gradients of family income. To understand "for whom" sleep may be particularly beneficial, the present study tested family income as a moderator of relations between youth sleep and physical health.

METHODS

Three hundred twenty-three youth (M age=17.39years; 53% female; 41% Black, 59% White) wore wrist actigraphs for 1week at home. Four well-recognized sleep parameters were derived: minutes, efficiency, long wake episodes, and variability in minutes across the week. Parents reported family income, and mothers rated adolescents' physical health. In independent path models, physical health was regressed onto each indicator of sleep, family income, and Sleep × Family Income interactions to test potential moderation effects.

RESULTS

Associations between sleep and physical health were moderated by family income. Lower sleep efficiency, more long wake episodes, and more variability in sleep minutes were associated with poorer physical health among adolescents from lower-income families. At optimal levels of all sleep variables, income-based differences in physical health were mitigated. Youth from higher-income families tended to have better physical health regardless of their sleep.

CONCLUSIONS

Findings build evidence that sleep has relations with physical health for low-income youth in particular. Clinicians and other service providers working with youth might benefit from considering the role of sleep in prevention and interventions programs geared toward improving health.

A multimethod evaluation of bed provision and sleep education for young children and their families living in poverty

STUDY OBJECTIVES

We evaluated the impact of bed provision and sleep education through the Beds for Kids (BfK) program on early childhood sleep and behavior and maternal mood and sleep.

METHODS

Twenty-seven mother-child dyads (childage= 2-5 years, 85.2% Black) living in poverty and without an individual child bed were randomly assigned (multimethod randomized waitlist control trial design) to BfK intervention ∼1 week postbaseline (initial intervention) or ∼2 weeks postbaseline (waitlist control), with follow-up at 1 month. BfK intervention (home bed delivery and written sleep health education) was provided to all families. Children wore actigraphs and mothers completed daily diaries to assess child and maternal sleep, child behavior, and maternal mood for the initial 1-week comparison period. Maternal-reported child sleep and behavior (internalizing and externalizing problems) were collected at 1 month after BfK participation for all families; 11 families completed a qualitative interview at 1-month follow-up.

RESULTS

At 1 week after BfK, mothers' sleep duration increased by 1 hour compared to that of waitlist controls. No changes were found in child sleep, child behavior, or maternal mood. However, at 1 month after BfK intervention, improvements were found in mother-reported child night awakenings, sleep quality, sleep problems, and behavior. Mothers qualitatively reported significant BfK benefits for child sleep and family well-being, although they noted challenges to transitioning young children to sleeping independently.

CONCLUSIONS

Bed provision and sleep education for families living in poverty has an immediate impact on maternal sleep and reported well-being. Child sleep and behavioral improvements are seen by 1 month, with children experiencing an initial adjustment period to sleeping independently.

CLINICAL TRIAL REGISTRATION

Registry: ClinicalTrials.gov; Name: Impact of Beds for Kids Program on Child Sleep; URL: https://www.clinicaltrials.gov/ct2/show/NCT03392844; Identifier: NCT03392844.

CITATION

Williamson AA, Min J, Fay K, Cicalese O, Meltzer LJ, Mindell JA. A multimethod evaluation of bed provision and sleep education for young children and their families living in poverty. J Clin Sleep Med. 2023;19(9):1583-1594.

Implications of Sleep Health Policy: Daylight Saving and School Start Times

ABSTRACT

Two proposed public policies, ending seasonal clock change with a transition to permanent Standard Time and moving middle school and high school start times later, are population-based initiatives to improve sleep health. Daylight Saving Time and early school start times are associated with reduced sleep duration and increased circadian misalignment, the effects of which impact not only long-term health outcomes including obesity, cerebrovascular and cardiovascular disease, and cancer, but also mental health, academics, workforce productivity, and safety outcomes. This article highlights studies that led to the endorsement of these public policies by multiple scientific and medical organizations. Neurologists should advocate at the state and federal levels and educate the population about the importance of sleep health.

Relationship between family income and trajectories of adjustment in adolescence: Sleep and physical activity as moderators

INTRODUCTION

Youth from lower-income families experience adjustment problems at higher rates than higher-income peers. While adolescents have little control over family income, they do have some agency over their sleep and physical activity, two factors that have been shown to mitigate the risk of maladjustment. To test this, sleep and physical activity were examined as moderators of the longitudinal relationship between family income (indexed by income-to-needs ratio) and trajectories of adolescent adjustment problems.

METHODS

Participants included a socioeconomically diverse community sample of 252 US youth (53% female; 33% Black, 67% White) in 2012-2015. Actigraphy-based sleep duration and quality were indexed, respectively, by minutes (sleep onset to wake excluding awakenings) and efficiency (% minutes scored as sleep from onset to wake). Physical activity and adjustment were youth-reported. Outcomes included internalizing (anxious/depressive) and rule-breaking behavior. Latent growth models estimated trajectories of adjustment across ages 16 and 18 years conditional on family income, sleep, physical activity, and their interactions.

RESULTS

Relationships between family income and change in internalizing symptoms were moderated by sleep minutes, and associations between income and change in internalizing symptoms and rule-breaking behavior were moderated conjointly by sleep efficiency and physical activity.

CONCLUSIONS

Under conditions of high-quality sleep and more physical activity, adolescents with lower income reported fewer adjustment problems. Conversely, youth with both poor sleep and low physical activity were at the highest risk for maladjustment over time. Findings enhance understanding of individual differences in trajectories of mental health associated with bioregulation, health behaviors, and the sociocultural context.

Socioeconomic disparities in sleep duration are associated with cortical thickness in children

INTRODUCTION

Disrupted sleep has been consistently linked with lower academic achievement and worse mental health in children. Less is understood about sleep as a potential factor underlying socioeconomic differences in brain morphometry in children. The goals of this study were to investigate the associations among socioeconomic factors, sleep duration, and brain morphometry in children, and to examine the roles of the sleep environment and family routines in these associations.

METHODS

Participants were 5- to 9-year-old children from socioeconomically diverse families (N = 94; 61% female). Parents reported on children's weekday and weekend sleep durations, sleep environment, and family routines. High-resolution, T1-weighted structural magnetic resonance imaging (MRI) data were acquired. Analyses focused on cortical thickness, cortical surface area, and amygdala and hippocampal volume.

RESULTS

Results indicated that lower family income-to-needs ratio and parental education were significantly associated with shorter weekday sleep duration in children. Shorter weekday sleep duration was significantly associated with reduced thickness in the left middle temporal, right postcentral, and right superior frontal cortices and smaller basolateral but not centromedial amygdala volume. Family routines significantly mediated the associations of family income-to-needs ratio and parental education with weekday sleep duration in children.

CONCLUSION

These results contribute to our understanding of sleep factors as proximal mechanisms through which socioeconomic context may alter neural development during childhood.

Chain mediating effect of insomnia, depression, and anxiety on the relationship between nightmares and cognitive deficits in adolescents

BACKGROUND

The study explored the differences in nightmare, insomnia, depression, anxiety, and cognitive deficits among adolescents and the chain mediating effects of insomnia, depression, and anxiety on the relationship between nightmares and cognitive deficits in adolescents.

METHODS

An online survey was used to collect demographic data of 6014 adolescents and assess nightmare, insomnia, depression, anxiety, and cognitive deficits using the Chinese Version of Nightmare Distress Questionnaire, Insomnia Severity Index, Patient Health Questionnaire 9, Generalized Anxiety Disorder 7, and Perceived Deficits Questionnaire-Depression. Spearman correlation analysis and the SPSS function "PROCESS macro" were used for correlation and mediation analyses, respectively.

RESULTS

Female adolescents, senior high school, and poor academic performance had higher nightmare, insomnia, and cognitive deficit scores; those living in the city had higher depression and anxiety scores. Cognitive deficits were positively correlated with nightmares, insomnia, depression, and anxiety. Further, insomnia, depression, and anxiety had a chain mediating effect between nightmares and cognitive deficits in adolescents. Nightmares indirectly affect cognition deficits by affecting insomnia and then depression and anxiety symptoms.

LIMITATIONS

As this was a cross-sectional study, the causal relationship between the variables could not be determined. Moreover, reporting bias and volunteer bias might be present.

CONCLUSIONS

These findings suggest that clinicians should identify adolescents with frequent nightmares early and provide timely treatment to minimize negative outcomes and possibly limit the chronicity of nightmare disorder. It is significant to maintain the physical and mental health development of adolescents to reduce the risk of insomnia, depression, anxiety, and cognitive deficits.

Sleep Reactivity and Related Factors in Adolescence: An Increased Risk for Insomnia? A Longitudinal Assessment

Purpose

The individual vulnerability for stress-related sleep difficulties (eg, sleep reactivity) is known as a predisposing factor of insomnia in adults, yet relatively little is known about sleep reactivity in adolescence. The study goal is to determine factors related to sleep reactivity and to investigate whether sleep reactivity and related factors predict current and new incidents of insomnia in adolescents.

Patients and Methods

At baseline, 11-to-17-year-olds (N = 185, M_age = 14.3 years, SD = 1.8, 54% female) answered an age-appropriate version of the Ford Insomnia Response to Stress Test, questionnaires about sleep, stress, psychological symptoms, and resources, filled out a sleep diary and used actigraphy. Insomnia diagnoses according to ISCD-3 criteria were assessed at baseline, after 9 months and after one and a half years.

Results

Adolescents with high compared to low sleep reactivity had increased pre-sleep arousal, negative sleep-related cognitions, pre-sleep mobile phone use, stress experience, stress vulnerability, internalizing and externalizing symptoms, less social resources, and a later midpoint of bedtime. High sleep reactivity increased the likelihood for currently having insomnia, but not for the development of insomnia at subsequent assessments.

Conclusion

The findings suggest that high sleep reactivity is related to poor sleep health and mental health but cast doubt on sleep reactivity as a pivotal predisposing factor for the development of insomnia in adolescence.

Factors that influence morningness-eveningness and daytime sleepiness: A cross-cultural comparison of Iranian and Brazilian adolescents

As adolescents get older, they become more evening oriented and, because they are usually expected to wake early to attend school, they often present daytime sleepiness, which is associated with negative outcomes. It is still unclear if this is similar cross-culturally. Here, we studied morningness-eveningness and daytime sleepiness in early adolescence from two different developing nations (Brazil and Iran). A total sample of 697 Iranian and Brazilian early adolescents (9- to 15-year-old; 358 boys) from Tehran, Iran, and São Paulo, Brazil, varying in age and parental schooling (a proxy of socioeconomic status: SES) completed the Morningness-Eveningness Scale for Children (MESC) and the Pediatric Daytime Sleepiness Scale (PDSS) and reported their total sleep time on school nights. They also filled in the Pubertal Developmental Scale to determine their pubertal status. A negligible cross-cultural difference in morningness-eveningness was found, indicating that Brazilians showed a slight circadian-phase delay compared with Iranians throughout all tested ages. There was also seen a very slight increase in phase delay as early adolescents aged, indicative of more eveningness. However, there were no country differences in daytime sleepiness once total sleep time during school nights was controlled for, which was the only factor that affects PDSS scores.

Disparities in sleep duration among American children: effects of race and ethnicity, income, age, and sex

Children in the United States sleep less than the recommended amount and sleep deficiencies may be worse among disadvantaged children. Prior studies that compared sleep time in children of different race/ethnic groups mostly relied on questionnaires or were limited to small sample sizes. Our study takes advantage of the Adolescent Brain Cognitive Development study to compare total sleep time using a week of actigraphy data among American children (n = 4,207, 9 to 13 y old) of different racial/ethnic and income groups. We also assessed the effects of neighborhood deprivation, experience of discrimination, parent's age at child's birth, body mass index (BMI), and time the child fell asleep on sleep times. Daily total sleep time for the sample was 7.45 h and race/ethnicity, income, sex, age, BMI, were all significant predictors of total sleep time. Black children slept less than White children (∼34 min; Cohen's d = 0.95), children from lower income families slept less than those from higher incomes (∼16 min; Cohen's d = 0.44), boys slept less than girls (∼7 min; Cohen's d = 0.18), and older children slept less than younger ones (∼32 min; Cohen's d = 0.91); mostly due to later sleep times. Children with higher BMI also had shorter sleep times. Neither area deprivation index, experience of discrimination, or parent's age at child's birth significantly contributed to sleep time. Our findings indicate that children in the United States sleep significantly less than the recommended amount for healthy development and identifies significant racial and income disparities. Interventions to improve sleep hygiene in children will help improve health and ameliorate racial disparities in health outcomes.

Sleepy and Secluded: Sleep Disturbances are Associated With Connectedness in Early Adolescent Social Networks

Studies in adults suggest that sleep disturbances predict poorer socioemotional skills and impaired social interactions. However, little is known regarding how sleep disturbances are associated with social processes during adolescence, a period when both sleep neurobiology and social relationships are undergoing dramatic developmental changes. The current study examined associations among sleep disturbances and peer connectedness in a sample of middle-school students (N = 213, 11-15 years old, 57% female) using a social network approach. Findings suggested that youth with greater sleep disturbances reported having fewer social connections, were rated as a social connection by fewer peers, and were less likely to have reciprocated nominations, even after controlling for sociodemographic characteristics and mental health symptoms.

Bidirectional associations between nightly sleep and daily happiness and negative mood in adolescents

This study examined bidirectional associations between daily happiness and negative mood and subjective and objective sleep measures. Participants were 311 adolescents (M_age = 17.37 years; 51.8% female; 59.2% White/European American, 38.6% Black/African American, 1% Hispanic/Latinx American, 1.4% multi‐racial; 19.3% below poverty line) observed over a 7‐day period (2017–2018) using sleep diaries and actigraphy. Daily negative mood was related to greater subjective sleep/wake problems, and happiness was related to lower subjective sleep/wake problems. Conversely, shorter self‐reported sleep duration was related to higher negative mood the next day. For actigraphy measures, daily negative mood was related to greater sleep duration and efficiency, whereas happiness was related to lower sleep efficiency. Differences in associations based on subjective versus objective sleep measures are discussed.

Equal Benefits? An Examination of the Potential Consequences of Later School Start Times for Adolescents and Their Mental Health

BACKGROUND

Given the documented benefits of later school start times on adolescents' mental health, the aim of the current study was to examine if the association between school start times and depressive symptoms differed across adolescents from families of different socioeconomic status levels.

METHODS

Using a cross-sectional design, the current study incorporated an online survey for high school students and their parents across the United States, with average sleep duration measured through a 7-day sleep diary. A total of 193 adolescent (Mean_age  = 15.7 years old, SD = .94; 54.4% female; 71% white) and parent (Mean_age  = 47.6 years old, SD = 5.4; 80% female; 79% white) dyads participated. Adolescents reported on depressive symptoms, sleep quality and duration, chronotype, and demographic covariates; parents reported on school start times and socioeconomic status.

RESULTS

Results suggested that only in adolescents from higher socioeconomic status families (+1 SD) did the association between later start times and fewer depressive symptoms emerge as significant.

CONCLUSIONS

Although more school start times research is needed to understand its impact across diverse groups of students, current findings suggest a disproportionate benefit of reduced depression for youth from families of higher socioeconomic status with having a later start time.

Early Life Socioeconomic Differences in Associations between Childhood Sleep and Academic Performance

Poor sleep can negatively impact children's academic performance. However, it is unknown whether early-life socioeconomic status (SES) moderates later sleep and academics. We tested associations between actigraphy-based sleep duration and midpoint time, and parent-reported sleep problems with objective and subjective measures of academic performance. We also examined whether relations varied by early and concurrent SES. Children (n=707; 52% female; M _age=8.44 years; 28.7% Hispanic/Latinx; 29.7% at/below poverty line) were assessed at 12 months for SES and eight years for SES, sleep, and academics. There were no main effects of sleep on academics. More sleep problems predicted lower Applied Problems performance for low SES children (b=-.73, p<.05) and better performance for high SES children (b=.69, p<.05). For high SES children, greater sleep problems (b=-.11, p<.05) and longer sleep duration (b=-.11, p<.05) predicted lower academic achievement. However, most associations were consistent across SES, illustrating the complex interplay between sleep, academic outcomes, and SES.

Adolescents' sleep and adjustment: Reciprocal effects

Reciprocal relations between sleep and adjustment were investigated. Participants included 246 adolescents (M = 15.80 years; 67.5% White, 32.5% Black/African American; 53% female, 47% male) at Time 1 (data collected 2012-2013), 227 at Time 2 (M = 16.78 years) and 215 at Time 3 (M = 17.70 years). Sleep-wake variables were measured with self-reports (sleepiness) and actigraphy (average sleep minutes and efficiency, variability in sleep minutes and efficiency). Adolescents reported on depression and anxiety symptoms, and parents reported on externalizing problems. Greater variability in sleep duration and efficiency as well as sleepiness predicted adjustment problems (range of R² : 36%-60%). Reciprocal relations were supported mostly for sleepiness (range of R² : 16%-32%). Results help understand bidirectional relations between sleep and adjustment.

Discrimination and adjustment in adolescence: the moderating role of sleep

STUDY OBJECTIVES

We examined multiple actigraphy-based sleep parameters as moderators of associations between experiences of general and racial discrimination and adolescent internalizing symptoms (anxiety, depression) and externalizing behavior (rule-breaking). Adolescent sex and race were examined as additional moderators.

METHODS

Participants were 272 adolescents (Mage = 17.3 years, SD = 0.76; 51% male; 59% White/European American, 41% Black/African American). Sleep was assessed using actigraphs for 7 consecutive nights from which sleep duration (minutes), efficiency, and variability in minutes over the week were derived. Youth reported on their experiences of general discrimination, racial discrimination, anxiety, depressive symptoms, and rule-breaking behavior.

RESULTS

Both types of discrimination were associated with poorer adjustment outcomes. Longer sleep duration, greater sleep efficiency, and less variability in sleep duration were protective in associations between race-specific and general discrimination and internalizing symptoms. Findings for duration and efficiency were more pronounced for females such that the adverse effects of discrimination were minimized among females with longer and more efficient sleep. Greater variability in sleep exacerbated rule-breaking behavior among adolescents experiencing general or racial discrimination. Associations did not differ by adolescent race.

CONCLUSIONS

Short and poor-quality sleep may exacerbate internalizing symptoms for adolescents experiencing discrimination, particularly females. Variability in sleep duration was a key moderator of associations between discrimination and internalizing symptoms as well as rule-breaking behavior. Findings illustrate that actigraphy-assessed sleep parameters play a key role in ameliorating or exacerbating adjustment problems associated with discrimination.

Exposure to peer aggression and adolescent sleep problems: Moderation by parental acceptance

Many adolescents experience or witness aggression by peers at school. The purpose of the current study was to examine associations between exposure to peer aggression (i.e., peer victimization and witnessing school violence) and sleep problems and whether these associations are moderated by parental acceptance. Participants included 272 adolescents attending high school (M age = 17.27 years; 49% female; 59% White/European American, 41% Black/African American). Adolescents reported on exposure to peer aggression, parental acceptance, and two key sleep domains: sleep quality problems and daytime sleepiness. Results indicated that exposure to peer aggression was directly associated with poor sleep quality and sleepiness. Furthermore, peer victimization and witnessing school violence interacted with parental acceptance to predict sleep quality. Specifically, exposure to peer aggression was associated with sleep quality problems at higher (but not lower) levels of parental acceptance. The lowest levels of sleep quality problems were apparent at low levels of peer aggression and high levels of parental acceptance, but parental acceptance did not protect adolescents with high exposure to peer aggression against sleep problems. Findings illustrate the importance of considering moderators of effects and the conjoint roles of family and peer processes when considering individual differences in adolescents' sleep. Future research should examine whether parental strategies targeted to address peer victimization are protective against the detrimental effects of exposure to peer aggression. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Association between Physical Activity and Sleep Difficulties among Adolescents in Germany: The Role of Socioeconomic Status

We examined sleep difficulties among adolescents in Germany and the association with physical activity (PA). Furthermore, we analyzed whether the association varied with the socioeconomic status (SES) among adolescent girls and boys in Germany. Using data from the German Health Interview Examination Survey for Children and Adolescents (KiGGS) study (Wave 2), 6599 adolescents aged 11 to 17 years were included in the analyses. We conducted sex-stratified logistic regression analyses. Dependent variables were unrecommended sleep duration (defined as a duration of sleep that does not meet the recommended duration), sleep-onset difficulties, trouble sleeping, and daytime sleepiness. Most adolescent girls and boys reported sleep difficulties. While no associations between PA and sleep difficulties were observed, a significant interaction between PA and SES was found for sleep duration in boys and daytime sleepiness in girls. Thus, adolescents with low SES had fewer sleep difficulties if they met the recommendation for PA, compared with those in other SES groups. In Germany, a large proportion of adolescents have sleep difficulties. We found that the experience of sleep difficulties varied according to PA, sex, and the family SES. Future sleep promotion programs should consider these differences.

Sleep Problems, Cumulative Risks, and Psychological Functioning in Early Childhood

BACKGROUND

Sleep problems and cumulative risk factors (e.g., caregiver depression, socioeconomic disadvantage) have independently been linked to adverse child development, but few studies have examined the interplay of these factors. We examined whether cumulative risk exposure moderated the link between sleep problems, including insomnia and poor sleep health, and child psychological outcomes.

METHODS

205 caregiver-child dyads (child Mage = 3.3 years; 53.7% girls; 62.9% Black, 22.4% non-Latinx White, and 4.4% Latinx; 85.4% maternal caregiver reporter) completed child sleep, family sociodemographic, and child psychological functioning (internalizing, externalizing, and executive functioning) questionnaires. Indexes of cumulative risk exposure, insomnia symptoms, and poor sleep health were created.

RESULTS

Ninety percent of children had ≥1 cumulative risks, 62.9% had ≥1 insomnia symptom, and 84.5% had ≥1 poor sleep health behavior. Increased insomnia symptoms were significantly associated with increased child internalizing, externalizing, and global executive functioning impairments controlling for child age, race/ethnicity, and sex. Poor sleep health behaviors were associated with internalizing concerns. Cumulative risk exposure was not associated with outcomes but moderated the association between insomnia symptoms and all psychological outcomes, such that children with higher cumulative risk exposure and insomnia symptoms had the greatest impairments. Children with the poorest sleep health behaviors and highest cumulative risks had the greatest internalizing concerns.

CONCLUSIONS

Insomnia symptoms in particular are associated with poor child outcomes, which are exacerbated when accompanied by greater cumulative risk exposure. Clinicians should assess sleep when treating early psychological concerns, especially within the context of increased cumulative risks.