Longitudinal study of childhood sleep trajectories and adolescent mental health problems.

Study Objective: To investigate whether childhood sleep trajectories are associated with mental health symptoms such as social phobia, generalized anxiety, depression, attention deficit hyperactivity disorder (ADHD), conduct problems, and opposition at age 15.

Methods: A total of 2120 children took part in the Quebec Longitudinal Study of Child Development. Childhood sleep trajectories were computed from maternal reports at 2.

[Assessments of sleepiness in adolescents: A key tool for better intervene in mental health].

Objectives Daytime sleepiness in adolescents has negative impacts on physical, cognitive, and emotional health, with direct or indirect consequences on their mental health. This review aims to describe specialized tools assessing daytime sleepiness in adolescents so that mental health professionals can screen for a variety of sleep disorders, from the rarest ones, such as narcolepsy, to the most common ones, such as sleep-wake cycle delay in adolescents. Method Articles were selected in Medline (https://pubmed.

Portrait of sleep in preschoolers involved with Child Protective Services and from the community.

Objectives: The objectives of this exploratory study were: 1) to draw a portrait of sleep, using actigraphic sleep measures, sleep diaries and a validated sleep questionnaire in preschoolers (3- to 5-year-olds) involved with Child Protective Services (CPS) and to compare it with preschoolers from the community, not involved with CPS and 2) to verify whether the sleep differences between the two groups persisted after adjusting for covariates (sociodemographic and child characteristics).

Methods: A total of 92 preschoolers aged from 3 to 5 years (49,5 ± 7,0 months) participated in the study (n = 22 preschoolers involved with CPS and n = 70 preschoolers from the community). Actigraphic sleep parameters were recorded using the child's non-dominant wrist over 72 h during weekdays and sleep diaries were filled out by parents (for nighttime) and childcare specialists (for daytime).

Nocturnal sleep duration trajectories in early childhood and school performance at age 10 years.

Sleep plays a fundamental role in brain development and resultant functions. The aim was to verify whether nocturnal sleep duration during early childhood has long-term associations with academic achievement at age 10 years. The present study is part of the Quebec Longitudinal Study of Child Development, a representative cohort of infants born in 1997-1998 in the province of Quebec, Canada.

Sleep ecology, objective sleep characteristics and behavior problems in preschoolers referred to child protection services: An exploratory study.

Background: Exposure to environmental risk factors increases the negative impact maltreatment has on children's development. Sleep ecology (i.e.

Testing Bidirectional, Longitudinal Associations Between Disturbed Sleep and Depressive Symptoms in Children and Adolescents Using Cross-Lagged Models.

Importance: Understanding the longitudinal, bidirectional associations between disturbed sleep and depression in childhood and adolescence is crucial for the development of prevention and intervention programs.

Objective: To test for bidirectional associations and cascade processes between disturbed sleep and depressive symptoms covering both childhood and adolescence and to test for the moderating processes of sex and pubertal status in adolescence.

Design, Setting, And Participants: A prospective cohort study using the Québec Longitudinal Study of Child Development (QLSCD; 1997-ongoing).

Sleep ecology, sleep characteristics and behavior problems in young maltreated children: A scoping review.

Background: Behavior problems are highly prevalent in young maltreated children. Their etiology is multifactorial and has been widely documented. Lately, researchers paid increased attention to the role of sleep in non-maltreated children's behavior problems.

Childhood restless legs syndrome: A longitudinal study of prevalence and familial aggregation.

Restless legs syndrome is a relatively common neurological disorder in adults. In childhood, however, its prevalence and genetic contribution are still largely unknown. The objectives of this study were to assess the prevalence of restless legs syndrome (RLS) during childhood and adolescence in a large population-based cohort and evaluate the degree of association with parental history.

What Is the Link Between Attention-Deficit/Hyperactivity Disorder and Sleep Disturbance? A Multimodal Examination of Longitudinal Relationships and Brain Structure Using Large-Scale Population-Based Cohorts.

Background: Attention-deficit/hyperactivity disorder (ADHD) comorbid with sleep disturbances can produce profound disruption in daily life and negatively impact quality of life of both the child and the family. However, the temporal relationship between ADHD and sleep impairment is unclear, as are underlying common brain mechanisms.

Methods: This study used data from the Quebec Longitudinal Study of Child Development (n = 1601, 52% female) and the Adolescent Brain Cognitive Development Study (n = 3515, 48% female).

High separation anxiety trajectory in early childhood is a risk factor for sleep bruxism at age 7.

Study Objectives: The evolution of sleep bruxism manifestations and their co-occurrence with separation anxiety in early childhood remain unclear. Our threefold aim was to: (1) describe developmental sleep bruxism trajectories in early childhood, (2) investigate co-occurrences between trajectories of sleep bruxism and separation anxiety, and (3) determine whether distinct trajectories of separation anxiety increase the risk of presenting sleep bruxism during the first year of elementary school.

Methods: This study is part of the Québec Longitudinal Study of Child Development.

Longitudinal Association Between Peer Victimization and Sleep Problems in Preschoolers: The Moderating Role of Parenting.

This study examined the moderating role of parental behaviors in the longitudinal link between peer victimization and sleep problems during preschool. The sample consisted of 1,181 children (594 girls) attending day care between the ages of 3 and 6 years. Participants were part of the Quebec Longitudinal Study of Child Development, a longitudinal study of child development led by the Institut de la Statistique du Quebec.

Early childhood trajectories of separation anxiety: Bearing on mental health, academic achievement, and physical health from mid-childhood to preadolescence.

Background: Separation anxiety disorder is the most prevalent childhood anxiety condition, but no study assessed children for separation anxiety at preschool age and followed them longitudinally and directly until mid-childhood/early adolescence.

Methods: Multi-informant (children, teachers, family), multipoint (at age 8, 10, 12, 13) assessments of 1,290 children of the Quebec Longitudinal Study of Child Development, who had been categorized between age 1.5 and 6 into four specific separation anxiety trajectories (1, low-persistent; 2, low-increasing; 3, high-decreasing, and the less common: 4, high-increasing) by growth mixture modeling.

Short persistent sleep duration is associated with poor receptive vocabulary performance in middle childhood.

The aim of this study was to examine whether short sleep duration is associated with poor receptive vocabulary at age 10 years. In the Quebec Longitudinal Study of Child Development, parents reported their children's nocturnal sleep duration annually from ages 2.5 to 10 years, and children were assessed for receptive vocabulary using the Peabody Picture Vocabulary Test-Revised (PPVT-R) at ages 4 and 10 years.

Early Risk Factors of Overweight Developmental Trajectories during Middle Childhood.

Background: Research is needed to identify early life risk factors associated with different developmental paths leading to overweight by adolescence.

Objectives: To model heterogeneity in overweight development during middle childhood and identify factors associated with differing overweight trajectories.

Methods: Data was drawn from the Quebec Longitudinal Study of Child Development (QLSCD; 1998-2010).

Development and aetiology of body dissatisfaction in adolescent boys and girls.

This longitudinal study aims to describe the development of body dissatisfaction (BD), measured with the between the ages of 14 and 18, and to identify factors associated with BD at age 18, among 413 adolescents. Between the ages of 14 and 18, the proportion of girls wanting to be thinner increased, although it remained unchanged among boys. A ratio of 1:2 girls and 1:5 boys reported having seriously tried to lose weight.

Distinct trajectories of separation anxiety in the preschool years: persistence at school entry and early-life associated factors.

Background: Little is known about how children differ in the onset and evolution of separation anxiety (SA) symptoms during the preschool years, and how SA develops into separation anxiety disorder. In a large, representative population-based sample, we investigated the developmental trajectories of SA symptoms from infancy to school entry, their early associated risk factors, and their associations with teachers' ratings of SA in kindergarten.

Methods: Longitudinal assessment of SA trajectories and risk factors in a cohort of 1,933 families between the ages of 1.

Negative events in childhood predict trajectories of internalizing symptoms up to young adulthood: an 18-year longitudinal study.

Background: Common negative events can precipitate the onset of internalizing symptoms. We studied whether their occurrence in childhood is associated with mental health trajectories over the course of development.

Methods: Using data from the TEMPO study, a French community-based cohort study of youths, we studied the association between negative events in 1991 (when participants were aged 4-16 years) and internalizing symptoms, assessed by the ASEBA family of instruments in 1991, 1999, and 2009 (n = 1503).

Genetic and environmental influences on daytime and nighttime sleep duration in early childhood.

Objectives: To determine the relative contributions of genetic and environmental factors on daytime and nighttime continuous sleep duration at 6, 18, 30, and 48 months of age, and to identify different subgroups of children who followed different daytime and nighttime sleep duration trajectories and to investigate their etiology.

Methods: The current study included 995 twins (405 monozygotic and 586 dizygotic) of the Quebec Newborn Twin Study recruited from the birth records of the Quebec Statistics Institute. Daytime and nighttime sleep was assessed through maternal reports at 6, 18, 30, and 48 months of age.

Childcare and overweight or obesity over 10 years of follow-up.

Objective: To investigate the predictive association between preschool childcare arrangements and overweight/obesity in childhood.

Study Design: Children were enrolled in a prospective birth cohort in Quebec, Canada (n = 1649). Information about childcare obtained via questionnaires to the mothers at ages 1.

Prior sleep problems predict internalising problems later in life.

Background: One possible risk marker of later internalising symptoms is poor sleep, which is a problem for up to 40% of children. The present study investigated whether prior sleep problems could predict internalising symptoms over a period of 18 years of follow-up.

Methods: The study sample included 1503 French young adults from the TEMPO cohort (mean age=28.

Childhood attention problems and socioeconomic status in adulthood: 18-year follow-up.

Background: Attention-deficit hyperactivity disorder (ADHD) has been associated with socioeconomic difficulties later in life. Little research in this area has been based on longitudinal and community studies.

Aims: To examine the relationship between childhood attention problems and socioeconomic status 18 years later.

Short sleep duration and increased risk of hypertension: a primary care medicine investigation.

Objectives: Compelling evidence from laboratory-based and population-based studies link sleep loss to negative cardiovascular health outcomes. However, little is known about the association between sleep duration and hypertension in primary care health settings, independently of other well controlled clinical and biochemical characteristics. We investigated the association between sleep duration and the prevalence of hypertension adjusting for 21 potential confounding factors in a noncontrolled primary care sample.

Sex differences in the association between sleep duration, diet and body mass index: a birth cohort study.

Sex differences in the effects of sleep duration on dietary intake and eating behaviours were examined prospectively in relation to overweight/obesity at ages 6 and 7. Using data from a representative sample (QLSCD 1998-2010) of children born in the province of Québec (Canada), 1106 children were followed to age 6 and 1015 to 7years. Average nocturnal sleep duration was surveyed annually from 2.

Developmental trajectories of body mass index in early childhood and their risk factors: an 8-year longitudinal study.

Objectives: To identify groups of children with distinct developmental trajectories of body mass index (BMI), calculated as weight in kilograms divided by height in meters squared, between the ages of 5 months and 8 years and identify early-life risk factors that distinguish children in an atypically elevated BMI trajectory group.

Design: Prospective cohort study.

Setting: Families with a child born between October 1997 and July 1998 in the province of Quebec, Canada.