A person-oriented approach was adopted to examine joint developmental trajectories of physical and indirect aggression. Participants were 1183 children aged 2 years at the initial assessment followed over 6 years. Most either low or declining aggression (PA), but 14.6% high stable trajectories. Approximately two-thirds participants (IA) (67.9%), one-third (32.1%) rising The results combining both PA IA group memberships indicate that most (62.1%) exhibit desisting levels IA. significant...

Early-life adversity is associated with a broad scope of life-long health and behavioral disorders. Particularly critical the role mother. A possible mechanism that these effects are mediated by “epigenetic” mechanisms. Studies in rodents suggest causal relationship between early-life changes DNA methylation several “candidate genes” brain. This study examines whether randomized differential rearing (maternal vs surrogate–peer rearing) rhesus macaques early adulthood. The data presented here...

Food insecurity (which can be defined as inadequate access to sufficient, safe, and nutritious food that meets individuals' dietary needs) is concurrently associated with children's psychological difficulties. However, the predictive role of regard specific types mental health symptoms has not previously been studied. We used data from Longitudinal Study Child Development in Québec, LSCDQ, a representative birth cohort study children born Québec region, Canada, 1997–1998 (n = 2120). Family...

<h3>Importance</h3> Mental health problems are common during the transition from adolescence to young adulthood. Although perceived social support and mental have been shown be concurrently associated, longitudinal studies lacking document directionality of this association, especially in emerging adulthood (late teens late 20s). <h3>Objective</h3> To test whether protects against later depression, anxiety, suicidal ideation suicide attempts after adjusting for a range confounders, including...

Importance Little is known about the long-term economic and social outcomes for children with longitudinally assessed comorbid externalizing internalizing symptoms, especially compared symptoms or only. Objective To examine association between childhood trajectories of externalizing, internalizing, outcomes. Design, Setting, Participants A 32-year prospective cohort study linked administrative data was conducted in school-aged participants aged 6 to 12 years Québec Longitudinal Study...

There has been much controversy over the past decades on origins of gender differences in children's aggressive behavior. A widely held view is that emerge sometime after 2 years age and increase magnitude thereafter because gender-differentiated socialization practices. The objective this study was to test for (a) prevalence physical aggression general population 17-month-old children (b) change these between 17 29 months age. Contrary differential hypothesis, results showed substantial at...

Background: The objective of the present study was to describe development boys and girls during elementary‐school years on three dimensions that conceptually empirically represent risk for maladjustment. Method: Every year between kindergarten grade six, teachers rated impulsivity, fearfulness, helpfulness among a sample 1,865 children representative in province Québec (Canada) 1986–87. A group‐based trajectory method used 1) identify groups following distinct‐level trajectories behaviours...

Abstract The purposes of this study were to model the development indirect aggression among a nationally representative sample 1,401 Canadian children aged 4 at T2, 6 T3, 8 T4 and 10 T5, examine predictors trajectory group membership from T1 (age 2) child, familial, parenting variables. Using semi‐parametric group‐based modeling approach, two distinct trajectories identified: “increasing users” comprising 35% “stable low 65% sample. logistic regression analyses distinguish these groups, we...

Literature clearly documents the association between mental health problems, particularly attention deficit hyperactivity disorder (ADHD), and educational attainment. However, inattention are generally not considered independently from each other in prospective studies. The aim of present study was to differentiate unique, additive, or interactive contributions symptoms attainment.The authors randomly selected 2,000 participants a representative sample Canadian children estimated...

Depressive and anxiety disorders are among the top ten leading causes of disabilities. We know little, however, about onset, developmental course early risk factors for depressive symptoms (DAS).Model trajectories DAS during childhood to identify atypically high DAS.Group-based conditional on were estimated from annual maternal ratings (1(1/2) 5 years) in a large population sample (n = 1759).DAS increased substantially two three distinct trajectory groups identified: High-Rising (14.7%);...

A longitudinal study with a nested preventive intervention was used to test five hypotheses generated from developmental theories of antisocial behavior. The followed 909 boys their kindergarten year up 17 years age. randomized multimodal targeted subsample who were rated disruptive by teacher. Semiparametric analyses trajectories for self-reported physical aggression, vandalism, and theft identified more types than expected recent theoretical models. Also, these did not confirm models,...

The main challenge in addressing the role of DNA methylation human behaviour is fact that brain inaccessible to epigenetic analysis living humans. Using positron emission tomography (PET) measures serotonin (5-HT) synthesis, we found a longitudinal sample adult males with high childhood-limited aggression (C-LHPA) had lower vivo 5-HT synthesis orbitofrontal cortex (OBFC). Here hypothesized alterations associated childhood were linked differential critical genes pathway and these changes also...

Context: Physical violence is an important health problem, and low maternal education a significant risk for the development of chronic physical aggression (PA).We hypothesized that nonmaternal care (NMC) services could prevent childhood PA problems, depending on age at which are initiated.Method: Children who followed trajectory atypically frequent between 17 60 months among population sample 1691 Canadian families were identified.Maternal NMC considered in predicting group membership while...

Background: Socially disadvantaged children with academic difficulties at school entry are increased risk for poor health and psychosocial outcomes. Our objective is to test the possibility that participation in childcare – population level could attenuate gap readiness achievement between without a social disadvantage (indexed by low levels of maternal education). Methods: A cohort infants born Canadian province Quebec 1997/1998 was selected through birth registries followed annually until...

The goal of the present study was to examine whether controlling parenting contributes problem physical aggression. Developmental trajectories children’s aggression were modeled from yearly teachers’ ratings, ages 6 12. Multinomial logistic regressions ( N = 1,508) served identify risk factors that distinguish children who display different levels throughout grade school. Results revealed being a boy and having reactive temperament important child predictors. Parental separation an early...

Suicidal ideation and suicide attempt (suicidality) are common in adolescence a public health concern. Childhood depression is key risk factor for later suicidality often co-occurs with irritability. No study to date has examined the joint association of depressive mood irritability during childhood suicidality.To investigate depressive/anxious profiles adolescent suicidality.This population-based cohort included 1430 participants Québec Longitudinal Study Child Development. Participants...

Background Research on associations between children's prosocial behaviour and mental health has provided mixed evidence. The present study sought to describe predict the joint development of with externalizing internalizing problems (physical aggression, anxiety depression) from 2 11 years age. Method Data were drawn National Longitudinal Survey Children Youth ( NLSCY ). Biennial behaviour, physical depression maternal ratings for 10,700 children aged 0 9 at first assessment point. Results...

The persistence of elevated subtypes aggression beginning in childhood have been associated with long-term maladaptive outcomes. Yet it remains unclear to what extent there are clusters individuals following similar developmental trajectories across forms (i.e., physical and indirect) functions proactive reactive) aggression. We aimed identify groups children distinct profiles the joint development risk factors for group membership. A sample 787 was followed from birth adolescence. Parent...

Abstract Recent models propose deoxyribonucleic acid methylation of key neuro-regulatory genes as a molecular mechanism underlying the increased risk mental disorder associated with early life adversity (ELA). The goal this study was to examine association ELA oxytocin receptor gene ( OXTR) among young adults. Drawing from 21-year longitudinal cohort, we compared adulthood OXTR frequency 46 adults (23 males and 23 females) selected for high or low exposure based on childhood socioeconomic...

Obtaining recent estimates of the prevalence suicide-related outcomes across adolescence and its associated mental health problems (MHPs) is important for clinical practice. We estimated at ages 13, 15, 17, 20 years (2011-2018) in a contemporary population-based cohort documented associations with MHPs throughout adolescence.Data came from 1618 participants Québec Longitudinal Study Child Development. Internalizing (depression anxiety) externalizing (oppositional/defiance, conduct issues,...