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Study Objectives: We examined growth trajectories of four actigraphy-derived sleep parameters (sleep minutes, sleep efficiency, and variability in sleep minutes and efficiency across a week of assessments) across childhood and adolescence and examined individual differences in trajectories according to participants' race/ethnicity and sex. We also assessed the predictive effect of growth trajectories of sleep parameters on growth trajectories of mental health outcomes and moderation by race and sex., Method: Youth (N = 199, 49% female, 65% white, 32% black, 3% biracial) and their parents participated in five waves of data (M ages were 9, 10, 11, 17, and 18 across waves). Participants were from a diverse range of socioeconomic backgrounds., Results: Across participants, sleep minutes, sleep efficiency, and variability in sleep minutes and efficiency demonstrated significant linear change across childhood and adolescence. Whereas sleep duration shortened over time, sleep efficiency improved. Youth exhibited increases in night-to-night variability in sleep minutes and reductions in night-to-night variability in sleep efficiency. Highlighting the importance of individual differences, some race- and sex-related effects emerged. Black youth and male youth experienced steeper declines in their sleep duration across development relative to their respective counterparts. Black youth also demonstrated smaller improvements in sleep efficiency and greater variability in sleep efficiency compared to white youth. Finally, trajectories of sleep efficiency and variability in sleep minutes predicted trajectories of internalizing symptoms and externalizing behaviors., Conclusions: Findings showed significant changes in developmental trajectories of four sleep parameters across childhood and adolescence. We discuss the empirical and translational implications of the findings., (© The Author(s) 2024. Published by Oxford University Press on behalf of Sleep Research Society.)

BackgroundWe examined maternal depressive symptoms (MDS) as longitudinal predictors of actigraphy-measured sleep; children's respiratory sinus arrhythmia (RSA) was tested as a moderator of these relations.MethodA total of 271 children (145 boys and 126 girls) participated in a three-wave study (M age at T1 = 9.38 years), with a 1-year lag between waves. Children wore actigraphs to derive sleep parameters. RSA reactivity was assessed during a social stress test.ResultsContrary to hypotheses, MDS were related to less sleep over time for children exhibiting greater RSA withdrawal. Consistent with hypotheses, MDS were related longitudinally to decreased sleep activity for children exhibiting less RSA withdrawal.ConclusionsFindings illustrate the importance of maternal influences and physiological regulation as predictors of children's sleep.

Summary: Maternal psychological control has been linked consistently to poorer adjustment for adolescents, however, studies of variability in the association between psychological control and adjustment are rare. Sleep serves crucial bioregulatory functions that promote well‐being and protect youths against poor adjustment associated with negative family environments. We hypothesised that the link between maternal psychological control and adolescent maladjustment would be strongest for youths with poorer actigraphy‐based sleep. The current study included 245 adolescents (Mage = 15.79 years, 52.2% girls, 33.1% Black/African American and 66.9% White/European American; 43% at or below the poverty line). Adolescents reported on their mothers' psychological control toward them, as well as their internalising and externalising symptoms (aggressive and rule breaking behaviours). Several sleep variables were derived: minutes, onset time, and variability in each parameter over 1 week. For youths with shorter, less consistent sleep (both mean levels and variability in minutes and onset), maternal psychological control was associated with adjustment difficulties, especially externalising symptoms. This association was not significant for youth obtaining longer, more consistent sleep. The results were most evident for variability in sleep minutes and onset as moderators of effects. The findings suggest that longer and more consistent sleep is an important protective factor in the context of more controlling parenting. [ABSTRACT FROM AUTHOR]

Toward better understanding the determinants of harsh parenting, the present study assessed prospective associations between mothers' and fathers' sleep problems and their harsh parenting toward their child using two waves of data. Children's gender was examined as a moderator of these associations. At the first wave, 257 families participated. Mean age was 36.15 years (SD = 5.70 years) for mothers, 39.78 years (SD = 7.54 years) for fathers, and 10.41 years (SD = 7.85 months) for children. The sample was diverse in terms of race/ethnicity and socioeconomic status with approximately 68% identifying as White/European American and 29% identifying as Black/African American. After approximately 1 year, families participated in a second study wave. Parents' sleep was assessed using actigraphy (sleep minutes, sleep efficiency, and long wake episodes) and mothers and fathers reported on the occurrence of their psychological and physical forms of harsh parenting toward their child. After controlling for autoregressive effects, fewer sleep minutes, reduced sleep efficiency, and more frequent long wake episodes among fathers predicted greater harsh parenting among fathers 1 year later. Child gender moderated some of these associations such that relations between fathers' poorer-quality sleep and higher levels of harsh parenting were more pronounced for boys. Sleep problems among mothers did not predict mothers' harsh parenting over time. Findings build on a growing literature that has considered sleep in the family context and provide novel insight into the influence of parents' sleep on their parenting practices. [ABSTRACT FROM AUTHOR]

Sleep deprivation in youth has garnered international attention in recent years, as correlational studies have demonstrated significant relationships between lack of sleep and detrimental behavioral and academic outcomes. However, no study to date has systematically examined the neurophysiological consequences of a single night of sleep restriction (i.e., 4 h) in adolescents using ultra-high field functional neuroimaging. Much of what we know regarding the neural consequences of sleep deprivation has come from the adult literature, and among those studies, the majority use region of interest (ROI) approaches, thus disregarding the dynamic mechanisms that may subserve the behavioral effects of sleep restriction. Leveraging a crossover within-subjects design, we demonstrate that pivotal brain regions involved in the default mode and limbic regulatory centers have disrupted functioning following a night of restricted sleep compared to a night of “normal sleep”. Specifically, a normal night (i.e., 8 h) of sleep led to increased global and local efficiency of bilateral amygdala, and less efficiency in the posterior cingulate, as measured by graph theory, compared to a night of sleep restriction. Furthermore, aberrant functional connectivity patterns were identified in key fronto-limbic circuitry, suggesting a potential pathophysiological mechanism underlying the widespread effects of sleep deprivation in youth. [ABSTRACT FROM AUTHOR]

The present study examined multiple indices of sleep as moderators of the association between peer victimization and adjustment among typically developing adolescents. Participants included 252 adolescents (M = 15.79 years; 66 % European American, 34 % African American) and their parents. A multi-method, multi-informant design was employed to address the research questions. Sleep was assessed objectively with actigraphy (sleep minutes and sleep efficiency) and subjectively with self-reports. Adolescents reported on peer victimization and internalizing symptoms. Externalizing behaviors were examined with mother and father reports. Subjective sleep/wake problems moderated the associations between peer victimization and internalizing and externalizing symptoms. A stronger relation emerged between peer victimization and internalizing symptoms among adolescents who reported higher versus lower levels of sleep/wake problems. Adolescents with elevated sleep/wake problems had higher levels of externalizing symptoms across the range of peer victimization. However, for those with fewer sleep/wake problems, a positive relation between peer victimization and externalizing symptoms was observed. Actigraphy-based sleep minutes and sleep efficiency also moderated the relations between peer victimization and internalizing symptoms. Although peer victimization was associated with higher levels of internalizing symptoms for all youth, those who reported the lowest levels of such symptoms had longer and more efficient sleep in conjunction with low levels of peer victimization. Findings are novel and highlight the importance of considering both bioregulatory processes and peer relations in the prediction of adolescents' adjustment. [ABSTRACT FROM AUTHOR]

Sleep problems (long wake episodes, low sleep efficiency) were examined as moderators of the relation between children's intelligence and academic achievement. The sample was comprised of 280 children (55% boys; 63% European Americans, 37% African Americans; mean age = 10.40 years, SD = 0.65). Sleep was assessed during seven consecutive nights of actigraphy. Children's performance on standardized tests of intelligence (Brief Intellectual Ability index of the Woodcock-Johnson III) and academic achievement (Alabama Reading and Math Test) were obtained. Age, sex, ethnicity, income-to-needs ratio, single parent status, standardized body mass index, chronic illness and pubertal development were controlled in analyses. Higher intelligence was strongly associated with higher academic achievement across a wide range of sleep quality. However, the association between intelligence and academic achievement was slightly attenuated among children with more long wake episodes or lower sleep efficiency compared with children with higher-quality sleep. [ABSTRACT FROM AUTHOR]

ABSTRACT We examined longitudinal relations between adult interpartner conflict (referred to as marital conflict) and children's subsequent sleep minutes and quality assessed objectively via actigraphy, and tested parasympathetic nervous system (PNS) activity indexed through respiratory sinus arrhythmia reactivity (RSA-R) and initial sleep as moderators of predictive associations. At Wave 1 (W1), children (85 boys, 75 girls) with a mean age of 9.43 years ( SD = .69) reported on marital conflict, and their sleep was assessed with actigraphs for seven nights. Sleep minutes, sleep efficiency, sleep activity, and number of long wake episodes were derived. RSA-R was measured in response to a lab challenge. Sleep parameters were assessed again 1 year later at Wave 2 (W2; mean age = 10.39; SD = .64). Analyses consistently revealed 3-way interactions among W1 marital conflict, sleep, and RSA-R as predictors of W2 sleep parameters. Sleep was stable among children with more sleep minutes and better sleep quality at W1 or low exposure to marital conflict at W1. Illustrating conditional risk, marital conflict predicted increased sleep problems (reduced sleep minutes, worse sleep quality) at W2 among children with poorer sleep at W1 in conjunction with less apt physiological regulation (i.e., lower levels of RSA-R or less vagal withdrawal) at W1. Findings build on the scant literature and underscore the importance of simultaneous consideration of bioregulatory systems (PNS and initial sleep in this study) in conjunction with family processes in the prediction of children's later sleep parameters. [ABSTRACT FROM AUTHOR]

This study examined longitudinal relations between sleep and body mass index (BMI) from late childhood (X¯ age = 9.44 at T1) to early adolescence (X¯ age = 11.36 at T3) with a relatively large (n = 273 at T1) and diverse (35% African Americans) sample. Sleep was assessed with actigraphy-based sleep minutes and self-reported sleep problems. Latent growth modeling revealed associations between sleep and BMI that varied based on the sleep parameter and sex of the child. In particular, although boys reported more sleep problems and had higher BMI than girls across time, self-reported sleep problems at age 9 predicted higher BMI at age 11 among girls (but not boys). Furthermore, more minutes of actigraph-assessed sleep at age 9 only predicted less growth in BMI among the girls. Possible mechanisms and intervention implications are discussed. [ABSTRACT FROM PUBLISHER]

We examined indices of children's parasympathetic nervous system activity ( PNS), including respiratory sinus arrhythmia during baseline ( RSAB) and RSA reactivity ( RSAR), to a laboratory challenge, and importantly the interaction between RSAB and RSAR as predictors of multiple parameters of children's sleep. Lower RSAR denotes increased vagal withdrawal (reductions in RSA between baseline and task) and higher RSAR represents decreased vagal withdrawal or augmentation (increases in RSA between baseline and task). A community sample of school-attending children (121 boys and 103 girls) participated [mean age = 10.41 years; standard deviation ( SD) = 0.67]. Children's sleep parameters were examined through actigraphy for 7 consecutive nights. Findings demonstrate that RSAB and RSAR interact to predict multiple sleep quality parameters (activity, minutes awake after sleep onset and long wake episodes). The overall pattern of effects illustrates that children who exhibit more disrupted sleep (increased activity, more minutes awake after sleep onset and more frequent long wake episodes) are those with lower RSAB in conjunction with lower RSAR. This combination of low RSAB and low RSAR probably reflects increased autonomic nervous system arousal, which interferes with sleep. Results illustrate the importance of individual differences in physiological regulation indexed by interactions between PNS baseline activity and PNS reactivity for a better understanding of children's sleep quality. [ABSTRACT FROM AUTHOR]

Children’s vagal tone and vagal suppression were examined as moderators of associations between children’s sleep disruptions and adjustment problems. A relatively large sample ( n = 167) of boys and girls who ranged in age between 8 and 9 years participated with their parents. Sleep was examined via actigraphy in the child’s home for seven consecutive days. Children’s vagal tone was examined during baseline conditions, and their vagal suppression was assessed in response to an inter-adult argument. In comparison with children exhibiting higher levels of vagal tone, those with lower vagal tone were at increased risk of externalizing problems, depression symptoms and higher body mass index associated with increased sleep disruptions (i.e. lower Sleep Efficiency, increased Wake Minutes and fewer Sleep Minutes). Thus, lower vagal tone functioned as a vulnerability factor for adjustment problems in the context of sleep problems. A higher level of vagal suppression to the inter-adult argument functioned as a protective factor against externalizing behaviors otherwise associated with increased Wake Minutes and reduced Sleep Efficiency. Findings demonstrating the moderating role of vagal functioning in the context of sleep disruptions are novel, and highlight the importance of individual differences in children’s physiological regulation for sleep and adjustment. [ABSTRACT FROM AUTHOR]

We explored relations between children’s sleep and levels of salivary interleukin-6 (IL-6). Children were healthy boys ( n = 28) and girls ( n = 36) who ranged in age between 8 and 9 years. Through actigraphy, the amount and quality of children’s sleep was examined objectively in their homes for 1 week. Children also rated their Morningness/Eveningness predisposition and subjective sleepiness, and parents reported on their children’s Sleep Disordered Breathing and Sleepiness. Children provided saliva samples before and after a series of cognitive/social tasks (an intelligence test, listening to a marital argument, and performing a star-tracing task), which were later assayed for IL-6. Children with higher salivary IL-6 levels reported increased Eveningness predispositions and their parents reported higher levels of Sleep Disordered Breathing. Furthermore, lower levels of sleepiness, longer sleep amount, and better quality sleep in children were each predictive of increased IL-6 reactivity from pre- to post-task conditions. The findings illustrate (for the first time to our knowledge) that sleep disruptions in otherwise healthy and normally developing children may be associated with individual differences in levels of IL-6 in saliva. [ABSTRACT FROM AUTHOR]

We examined 2 sleep-wake parameters as moderators of the associations between exposure to family stressors and adolescent cognitive functioning. Participants were 252 school-recruited adolescents {M = 15.79 years; 66% European American, 34% African American). Youths reported on 3 dimensions of family stress: marital conflict, harsh parenting, and parental psychological control. Cognitive functioning was indexed through performance on the Woodcock-Johnson III Tests of Cognitive Abilities. Sleep minutes and efficiency were measured objectively using actigraphy. Toward identifying unique effects, path models controlled for 2 family stress variables while estimating the third. Analyses revealed that sleep efficiency moderated the associations between negative parenting (harsh parenting and parental psychological control) and adolescents' cognitive functioning. The highest level of cognitive performance was predicted for adolescents with higher levels of sleep efficiency in conjunction with lower levels of either harsh parenting or psychological control. The effects of sleep were more pronounced at lower levels of negative parenting, in which adolescents with higher sleep efficiency performed better than their counterparts with poorer sleep. At higher levels of either harsh parenting or psychological control, similar levels of cognitive performance were observed regardless of sleep. Results are discussed in comparison with other recent studies on interrelations among family stress, sleep, and cognitive performance in childhood and adolescence. [ABSTRACT FROM AUTHOR]

Introduction: Sleep problems are associated with negative developmental outcomes in youth, and identification of vulnerability and protective factors is needed to explicate for whom and under which conditions adolescents may be most at risk. Towards this end, we examined socio-economic status (SES) as a moderator of associations between multiple sleep parameters and adolescents' socio-emotional adjustment and cognitive functioning.Methods: Participants were 272 adolescents (M age = 17.3 years; 49% girls) and their parents, residing in the Southeastern U.S.A. The sample was socioeconomically diverse and included 41% Black/African American and 59% White/European American youth. Using a cross-sectional design, adolescents' sleep was assessed with actigraphy (total sleep minutes; efficiency indicated by % of time asleep from sleep onset to wake time) and self-reports of sleep quality (sleep-wake problems). Mothers reported on youths' internalizing and externalizing symptoms, and cognitive functioning was assessed with a standardized test battery.Results: Moderation effects were found and illustrated that, for youth from families with lower SES, shorter and less efficient sleep and subjective sleep problems were associated with higher levels of internalizing and externalizing symptoms as well as lower cognitive performance. Conversely, longer and better-quality sleep protected against socio-emotional and cognitive difficulties otherwise observed for socioeconomically disadvantaged youth. Fewer relations between sleep and adjustment emerged for adolescents from families with higher SES.Conclusions: Results reinforce a growing literature indicating that the relation between sleep and adjustment is stronger for youth from families with lower SES, who may especially benefit from better sleep. [ABSTRACT FROM AUTHOR]