Childhood behavioral profiles leading to adolescent conduct disorder: risk trajectories for boys and girls

The developmental trajectory of prosocial behavior in economically disadvantaged children: General tendencies and heterogeneity

INTRODUCTION

This study explored the general tendencies and heterogeneous developmental trajectory of prosocial behavior and predictors.

METHOD

The present study conducted latent growth model and growth mixture model analyses in a sample of 814 students (Mage = 13.79 years old at baseline; 57% girls) from economically disadvantaged families, classified as being below the local income threshold in China, with four follow-up surveys administered during the following 2 years.

RESULTS

The general tendency in the developmental trajectory of prosocial behavior showed a linear decrease. A gender difference in initial levels was observed, with girls showing a higher initial level of prosocial behavior than boys. Family functioning, subjective support, and support utilization significantly affected the intercept, but objective support significantly negatively affected the slope. Heterogeneity in the development of prosocial behavior was best classified with a 3-class solution, including C1 (Rapid-decrease, 10.6%), C2 (Medium-stable, 42.5%), and C3 (High-increase, 46.9%). The patterns of prosocial behavior development in economically disadvantaged children with higher family functioning were more likely to be in the High-increase Class than in the Rapid-decrease Class.

CONCLUSION

The present study revealed an average decline in the trajectories of prosocial behavior development in economically disadvantaged children. However, it also captured heterogeneous developmental trajectories. Furthermore, the study revealed that family functioning, subjective support, and support utilization all served as protective factors for prosocial behavior among economically disadvantaged children.

Overparenting and psychological wellbeing among Chinese adolescents: Findings based on latent growth modeling

Although overparenting is a growing phenomenon across the globe, there is a severe lack of longitudinal studies examining the trajectory of overparenting and its effects on early adolescent development, particularly in non-Western contexts. The study collected three waves of longitudinal data from 1328 early Chinese adolescents in Hong Kong with an interval of 1 year to examine the stability and change of perceived paternal and maternal overparenting and their effects on adolescent psychological wellbeing. The results indicated that perceived paternal and maternal overparenting declined over time. Besides, adolescents reported lower anxiety and depressive symptoms when they perceived a steep decline in maternal overparenting. Adolescent anxiety at earlier time points also predicted a steeper decline in paternal and maternal overparenting trajectories respectively. Furthermore, we identified gender differences in the initial level of paternal overparenting and the trajectory of maternal overparenting, as well as the effects of rates of change of maternal overparenting on adolescent anxiety and depressive symptoms. The findings give support for self-determination theory and the separation-individuation model, suggesting that changes of overparenting may hinder adolescents' desires for autonomy and self-direction, which may increase their psychological morbidity. The study contributes to theoretical development of contemporary Chinese socialization models and provides useful pointers for future studies of overparenting.

Sex differences in conduct and emotional outcomes for young people with hyperactive/inattentive traits and social communication difficulties between 9 and 16 years of age: a growth curve analysis

BACKGROUND

The purpose of this paper is to identify the trajectory of conduct and emotional problems for young people within the general population at four time points (between 9 years 7 months and 16 years 6 months), investigate their relationship with hyperactive/inattentive traits and explore the moderating effect of autistic social traits (ASTs).

METHODS

Data from 9305 individuals involved in The Avon Longitudinal Study of Parents and Children (ALSPAC) study were included. Conduct and emotional problems and hyperactive/inattentive traits were measured by the Strengths and Difficulties Questionnaire. ASTs were assessed using the Social Communication Disorder Checklist. Individual trajectories for conduct and emotional problems were identified via growth curve modelling. Hyperactive/inattentive traits were included within the growth curve model as a time-varying covariate to determine their effect on these outcomes. Finally, participants were split into two groups (below and above clinical threshold ASTs Groups) and multi-group invariance testing was conducted on the data to identify the moderating effect of ASTs on the relationship between hyperactive/inattentive traits and outcomes (i.e. conduct and emotional problems).

RESULTS

Hyperactive/inattentive traits were associated with higher rates of conduct and emotional problems for both boys and girls. The presence of ASTs moderated these relationships for boys, but not for girls, by increasing the risk of boys with hyperactive/inattentive traits developing greater conduct and emotional problems.

CONCLUSIONS

These findings underscore the importance of identifying hyperactive/inattentive traits and ASTs in young people and addressing the increased risk of conduct and emotional problems. Research and clinical implications are explored.

Psychometric properties of the Social Behavior Questionnaire (SBQ) in a longitudinal population-based sample

We assessed the psychometric properties of the Social Behavior Questionnaire (SBQ), a 30-item questionnaire evaluating social (e.g., disruptive behaviors, bullying) and emotional problems (e.g., anxiety, depression) among children aged 3.5–12 years. Children ( n = 1,950, 50.21% boys) were drawn from the Quebec Longitudinal Study of Child Development. Mothers reported the frequency with which children presented social and emotional behaviors from 3.5 to 8 years of age, and teachers from 6 to 12 years. We assessed internal structure using Confirmatory Factor Analysis, reliability using Cronbach’s alpha, and convergent and discriminant validity using a multitrait-multimethod (MTMM) approach. The six-factor (emotional distress, withdrawal, impulsive/hyperactive/inattentive, disruptive behaviors, prosocial behaviors, and peer relationships difficulties) structure of the SBQ showed good fit from ages 3.5 to 12 years. Reliability estimates were good to excellent (alphas > .7), and MTMM showed good convergent and discriminant validity. Overall, the SBQ presented good psychometric properties with a large population-based sample aged 3.5–12 years. Further studies should assess its screening potential by investigating its convergent validity with diagnostic information.

Developmental multi-trajectory of irritability, anxiety, and hyperactivity as psychological markers of heterogeneity in childhood aggression

BACKGROUND

A growing body of evidence suggests that child aggression is likely to be driven by multiple developmental pathways. However, little is known about the complex interactions between developmental trajectories of child psychological factors (such as anxiety, irritability, and hyperactivity/impulsivity dimensions) and their associations with aggression from childhood to adolescence. Therefore, the current study aimed to identify clusters of individuals with different developmental multi-trajectory, investigate their early risk factors, and describe their longitudinal associations with physical aggression.

METHOD

The sample comprised 4898 children derived from the Fragile Families and Child Wellbeing Study. A parallel process growth mixture model was used to identify developmental multi-trajectory groups at 5, 9 and 15 years old. Associations between multi-trajectory group membership and physical aggression were examined with Generalized Estimating Equations models. Finally, multinomial logistic regression was performed to assess perinatal and early risk factors for multi-trajectory groups.

RESULTS

Multi-trajectory groups differed in the magnitude of risk for exhibiting physical aggression, compared to typically developing children. The risk for physical aggression was the most prominent in children who were hyperactive/impulsive and irritable [odds ratio (OR) 6.47; 95% confidence interval (CI) 5.44-7.70] and hyperactive/impulsive, irritable, and anxious (OR 7.68; CI 6.62-8.91). Furthermore, maternal cigarette and alcohol use during pregnancy and maternal depression consistently predicted multi-trajectory groups characterized by problematic levels of at least two co-occurrent psychological symptoms.

CONCLUSIONS

Identified combinations of developmental trajectories of psychological characteristics were associated with different magnitude in risk for exhibiting physical aggression. These results may highlight the heterogeneity of developmental trajectories associated with childhood aggression.

Self and parent-reported sleep problems of adolescents with childhood conduct problems and comorbid psychological problems

INTRODUCTION

Childhood conduct problems (CP) are characterized by maladaptive externalizing behaviors and are linked with poor sleep. CP are highly comorbid with other psychological problems, including attention deficit/hyperactivity disorder and depression, which are also associated with disturbed sleep. The present study examined if childhood CP and comorbid depressive and/or attentional-hyperactivity problems were prospectively associated with parent and self-reported sleep difficulties in adolescence.

METHODS

Participants (N = 744; 53% boys) from an ongoing longitudinal study in Québec, Canada were assessed for CP and comorbidities when they were between 6 and 9 years old. Participants were classified as without CP, CP only, CP and depressive symptoms, CP and attention-hyperactivity problems, or CP, depressive symptoms, and attention-hyperactivity problems. Regressions were conducted to examine the associations between comorbidity groups, parent, and self-reported sleep problems 7 years later (Median age = 15.33 years), controlling for sex, age, family income, primary caregiver education and medication.

RESULTS

Adolescents in all CP groups had higher self and parent-reported sleep problems compared to adolescents without histories of CP. Adolescents with histories of CP, depressive symptoms and attention-hyperactivity problems had more sleep problems than all other groups according to self-reports, but not parent-reports.

CONCLUSION

Childhood CP was prospectively linked to sleep problems in adolescence, and comorbid conditions exacerbated these problems, according to youth but not parents.

Trajectories of victimization to violence among incarcerated women

INTRODUCTION

Limited research has focused on the trajectories of victimization to violence in women's lives. Furthermore, literature assessing women's use of violence has primarily focused on adult risk factors (e.g., substance use and criminal histories). Drawing from the pathway's framework, we explored the impact of multiple forms of childhood victimization and subsequent harmful behaviors on adult-perpetrated violence among women convicted of violent or serious crimes.

METHODS

This secondary data analysis included a sample of 1118 incarcerated women from two prisons. Based on prior literature outlining the lifelong negative impact of childhood victimization, we hypothesized that cumulatively, occurrence of abuses, arrest as a minor, number of lifetime arrests, and poly-substance use prior to incarceration, would increase the likelihood of perpetration of multiple forms of violence. GEE regression models were used to examine the relationship between the predictors and adult perpetration of intimidation and physical violence.

RESULTS

Experiences with childhood victimization, early (under age 18) and ongoing criminal justice involvement, and substance use significantly increased the likelihood of adult perpetration of violence, regardless of the type of violence measured (intimidation or physical violence).

CONCLUSION

Given the documented high prevalence of childhood trauma and abuse among justice-involved women, findings from this study can be used to promote the implementation of trauma-specific treatment for at-risk juvenile girls, whose trajectories of violence might be mitigated.

Inflammaging: Blame the sons. Relationships between the number of sons and the level of inflammatory mediators among post-reproductive women

OBJECTIVES

Reproduction is costly, but sons and daughters differently influence maternal physiology, also in older age. In particular, having sons may negatively influence maternal health and may be associated with a shorter life span of mothers. Sons may also contribute to increased inflammaging, a chronic sub-clinical systemic inflammatory state characterized by elevated levels of serum inflammatory mediators. The aim of this study was to examine the impact of the total number of children, and the number of daughters and sons separately on concentrations of C-reactive protein (CRP), and proinflammatory cytokines such as interleukin 6 (IL-6) and tumor necrosis factor-α (TNF-α).

MATERIALS AND METHODS

The participants were 378 women aged 45-92 who had 3.9 (SD 2.12, median = 4, range = 0-13) children, including 2.1 (SD 1.46, median = 2, range = 0-8) sons and 1.8 (SD 1.44, median = 2, range = 0-7) daughters on average.

RESULTS

We found a positive relationship between the overall number of children and IL-6 levels. CRP and IL-6 concentrations were positively associated with the number of sons but not with the number of daughters. Each son increased maternal CRP level by 11%, and IL-6 level by 6%. Neither the total number of children nor the number of daughters or sons were related to the TNF-α concentration.

DISCUSSION

Aging-associated inflammation in post-reproductive mothers with a higher number of sons supports the hypothesis of trade-offs between reproduction and health. Furthermore, these results provide new evidence contributing to the idea that having sons may have more detrimental effects on the maternal organism than having daughters.

Multiple developmental pathways underlying conduct problems: A multitrajectory framework

In the past decades, there has been an overemphasis of a descriptive/behavioral approach to study conduct disorder. In an equifinal perspective, we aimed to examine the developmental multitrajectory groups of psychological features (irritability, interpersonal callousness, hyperactivity/impulsivity, and depressive-anxiety symptoms) and their associations with conduct problems. In a population-based cohort (n = 1,309 participants followed from 5 months to 17 years old), latent-class growth analysis was performed for each psychological feature to identify a two-trajectory model (from ages 6 to 12 years). Based on parameter estimates of the two-trajectory models for each of the four psychological features, a parallel process growth mixture model identified eight significant developmental patterns that were subsequently compared with typically developing children. Furthermore, we observed that while interpersonal callousness conferred an increased risk for childhood and adolescence conduct problems, its co-occurrence with hyperactivity/impulsivity, irritability, and/or depressive-anxiety symptoms heightened the general risk, but also predicted distinct subtypes of conduct problems (i.e., aggressive and rule-breaking behaviors). Thus, by studying complex developmental combinations of psychological features, we observed qualitatively distinct pathways towards conduct problems. A multitrajectory framework of psychological features should be considered as a significant step towards unveiling the multiple etiological pathways leading to conduct disorder and its substantial clinical heterogeneity.

Peer Victimization in Late Childhood Moderates the Relationship between Childhood Fear/Inhibition & Adolescent Externalizing Symptoms

OBJECTIVE

Studies of the association between early childhood low temperamental fearfulness or behavioral inhibition (BI) and later externalizing symptoms are few and results are inconsistent, despite research from outside the temperament field that has linked fearlessness with externalizing problems. There is also a large literature showing that peer victimization (PV) predicts externalizing symptoms. However, no prior studies have examined the joint effect of low temperamental fearfulness/BI and PV on externalizing psychopathology. The current study examined the main and joint effects of low temperamental fearfulness/BI and PV on broad internalizing and externalizing problems, as well as more narrow forms of externalizing psychopathology.

METHOD

Participants included 559 children (86.5% white, 54% male) assessed at ages 3, 6, 9, and 12. Temperamental fearfulness/BI was assessed using laboratory observations at age 3. PV was assessed via semi-structured interviews at ages 6 and 9. Finally, internalizing and externalizing psychopathology were each assessed at ages 3 and 12.

RESULTS

After accounting for sex, race, and age 3 symptomatology, the joint effect of low temperamental fearfulness/BI and PV predicted higher levels of externalizing problems overall and specific externalizing symptom domains, but not internalizing problems.

CONCLUSION

These results suggest that there is an association between low temperamental fearfulness/BI and later externalizing psychopathology, but that it depends on moderating factors such as PV.

Predicting differentiated developmental trajectories of prosocial behavior: A 12-year longitudinal study of children facing early risks and vulnerabilities

The current study examined the heterogeneity in the development of school-based prosocial behavior from Grades 1 to 12 and the role of multiple early childhood antecedents in predicting heterogeneous developmental trajectories of prosocial behavior in a sample of 784 children facing early risks and vulnerabilities (predominantly from low-income families and academically at risk; 52.6% male). In alignment with the risk and resilience framework, antecedents consisted of risk and protective factors from both individual (i.e., ego-resilient personality, behavior problems, intelligence, academic performance, gender, and ethnicity) and contextual domains (i.e., maternal support and responsiveness, family socioeconomic adversity, teacher–child warmth and conflict, and peer acceptance and rejection). We identified four distinct prosocial trajectories including a high-stable (52.5%), high-desisting (15%), moderate-increasing (20.6%), and low-stable class (11.9%). Results revealed that the low-stable, high-desisting, and moderate-increasing classes were associated with lower ego resiliency, higher behavior problems, lower teacher–child warmth, higher teacher–child conflict, and peer rejection in early childhood, compared to the high-stable group. Boys and African Americans were more likely to be in the low-stable, high-desisting, and moderate-increasing classes. Individual characteristics such as ego-resilient personality and contextual influences such as teacher–child warmth served as common protective antecedents. Interestingly, teacher–child conflict served as a unique predictor for the high-desisting class, and behavior problems and peer rejection served as unique predictors for the low-stable class.

Children With Early-Onset Disruptive Behavior: Parental Mental Disorders Predict Poor Psychosocial Functioning in Adolescence

OBJECTIVE

Parental mental disorders (MD) and child early-onset disruptive behavior (DB) are well-established risk factors for poor outcomes in adolescence. However, it is not clear whether parental MD increases risk of future maladjustment among children who already display DB.

METHOD

Parents of 9-year-old children reported on child DB, whereas a patient registry was used to determine parental MD. At follow-ups at ages 15 (n = 6,319) and 18 (n = 3,068) years, information about various problems were collected via registries, parent-, and self-reports.

RESULTS

In the total sample, child DB was related to all outcomes (mean odds ratio [OR] = 1.18; range = 1.07-1.51; p values < .01), paternal MD to criminality, aggression, truancy, poor school performance, and a cumulative risk index of poor functioning, and maternal MD to peer problems, rule breaking, and truancy (mean OR = 1.67; range = 1.19-2.71; p values < .05). In the subsample of children with DB, paternal MD predicted criminality, consequences of antisocial behavior, truancy, poor school performance, and cumulative risk, whereas maternal MD predicted peer problems (mean OR = 1.94; range = 1.30-2.40; p values < .05).

CONCLUSION

This study provides novel evidence that parental MD places 9-year-olds with DB at risk for negative outcomes in adolescence. In addition, paternal MD is a better predictor than maternal MD, regardless of child DB at age 9, suggesting that fathers should be given increased attention in future research. Treatment-as-usual of children with DB could be augmented with additional screening and, if necessary, treatment of mental health problems in their parents.

Heterogeneity in Cognitive and Socio-Emotional Functioning in Adolescents With On-Track and Delayed School Progression

Adolescence is characterized by considerable changes in cognitive and socio-emotional skills. There are considerable differences between adolescents with regards to the development of these skills. However, most studies examine adolescents' average functioning, without taking into account this heterogeneity. The current study applies network analysis in order to examine heterogeneity of cognitive and socio-emotional functioning in adolescents on-track or delayed in their school progression. Data was collected at two time-points for on-track (n = 320) and delayed (n = 69) adolescents (Mage = 13.30 years, SDage = 0.77). Repeated measures ANOVA showed no significant differences between the groups in cognitive and socio-emotional functioning (p's > 0.05). Network analysis revealed that executive functions play a key role in the network of cognitive, social, and emotional functioning. This is especially the case in the delayed group where executive functions are even more central, both at T1 (inhibition and shifting) and T2 (shifting). Subsequent community analysis revealed three profiles in both groups: a well-adapted and well-balanced group, a group with high levels of need for arousal and risk-taking, and a group with regulation problems. Compared to on-track adolescents, delayed adolescents showed even higher levels of risk-taking in the second profile and higher levels of executive function problems in the third profile at T1. These differences were leveled out at T2, indicating adolescents in the delayed group catch up with their peers. This study highlights the intricate balance between cognitive, social and emotional functioning in adolescents in relation to school performance and provides preliminary evidence of the importance of taking individual differences within groups into account.

Growth in inhibitory control among low-income, ethnic-minority preschoolers: A group-based modeling approach

The emergence of self-regulation skills such as inhibitory control in children is an important developmental process associated with adjustment across multiple domains. Individual differences in inhibitory control are associated with family socioeconomic status but have not been studied in relation to variations in risk found within a low-income (i.e., high risk) sample (N = 407). Using a group-based modeling approach, change in inhibitory control was examined from 30 to 42 months of age in a sample of low-income Hispanic and African-American children. Patterns of change in inhibitory control were examined in relation to cumulative risk and child externalizing behavior using the Child Behavior Checklist measured at 42 months. A three-group solution was identified as optimally fitting the data, representing patterns of change in inhibitory control: a normative group, exhibiting increasing inhibitory control (48%); a low-stable group (40%); and a high-stable group (12%). Group membership did not differ by child ethnicity or gender. Higher cumulative risk was found among the children in the low-stable group than in the other groups. Mothers reported more externalizing problems at 42 months for children in the low-stable group than in the other groups, even controlling for the effect of cumulative risk. Intervention and policy implications are discussed.

ADHD symptoms and peer relations of children in a community sample: Examining associated problems, self-perceptions, and gender differences

This study examined children's peer relations in relation to gender, symptoms of attention-deficit/ hyperactivity disorder (ADHD), associated behaviour problems, prosociality, and self-perceptions, in a community sample. Six hundred and thirty-five 12-year-old children (314 girls) provided peer nominations and rated feelings of loneliness and self-perceptions regarding global self-worth and behavioural conduct. We obtained teacher ratings of ADHD symptoms, conduct and internalising problems, and prosociality. ADHD symptoms, conduct problems, internalising problems, and low levels of prosociality were all related to higher levels of peer dislike. Despite ADHD symptoms being related to more peer dislike, children with high levels of ADHD symptoms did not report more feelings of loneliness. The self-perceptions of children with high levels of ADHD were not related to peer dislike. Although high levels of ADHD symptoms were not related to peer dislike in girls, peers tolerated higher levels of ADHD symptoms among boys than among girls, providing support for the “gender appropriateness hypothesis” regarding the impact and influence of ADHD symptomatology upon the peer relations of children within a community sample.

Developmentally dynamic genome: Evidence of genetic influences on increases and decreases in conduct problems from early childhood to adolescence

The development of conduct problems in childhood and adolescence is associated with adverse long-term outcomes, including psychiatric morbidity. Although genes constitute a proven factor of stability in conduct problems, less is known regarding their role in conduct problems' developmental course (i.e. systematic age changes, for instance linear increases or decreases).Mothers rated conduct problems from age 4 to 16 years in 10,038 twin pairs from the Twins Early Development Study. Individual differences in the baseline level (.78; 95% CI: .68-.88) and the developmental course of conduct problems (.73; 95% CI: .60-.86) were under high and largely independent additive genetic influences. Shared environment made a small contribution to the baseline level but not to the developmental course of conduct problems. These results show that genetic influences not only contribute to behavioural stability but also explain systematic change in conduct problems. Different sets of genes may be associated with the developmental course versus the baseline level of conduct problems. The structure of genetic and environmental influences on the development of conduct problems suggests that repeated preventive interventions at different developmental stages might be necessary to achieve a long-term impact.

Developmental association of prosocial behaviour with aggression, anxiety and depression from infancy to preadolescence

BACKGROUND

Research on associations between children's prosocial behaviour and mental health has provided mixed evidence. The present study sought to describe and predict the joint development of prosocial behaviour with externalizing and internalizing problems (physical aggression, anxiety and depression) from 2 to 11 years of age.

METHOD

Data were drawn from the National Longitudinal Survey of Children and Youth (NLSCY). Biennial prosocial behaviour, physical aggression, anxiety and depression maternal ratings were sought for 10,700 children aged 0 to 9 years at the first assessment point.

RESULTS

While a negative association was observed between prosociality and physical aggression, more complex associations emerged with internalizing problems. Being a boy decreased the likelihood of membership in the high prosocial trajectory. Maternal depression increased the likelihood of moderate aggression, but also of joint high prosociality/low aggression. Low family income predicted the joint development of high prosociality with high physical aggression and high depression.

CONCLUSIONS

Individual differences exist in the association of prosocial behaviour with mental health. While high prosociality tends to co-occur with low levels of mental health problems, high prosociality and internalizing/externalizing problems can co-occur in subgroups of children. Child, mother and family characteristics are predictive of individual differences in prosocial behaviour and mental health development. Mechanisms underlying these associations warrant future investigations.

Prosociality During the Transition From Late Adolescence to Young Adulthood

The present prospective study examined the prediction of prosociality from effortful control and ego-resiliency from late adolescence to emerging adulthood. Participants were 476 young adults (239 males and 237 females) with a mean age of 16 years ( SD = .81) at T1, 18 years ( SD = .83) at T2, 20 years ( SD = .79) at T3, 22 years ( SD = .81) at T4, and 26 years ( SD = .81) at T5. Controlling for the stability of the examined variables and the effect of potential confounding variables (i.e., sex, socioeconomic status [SES], and age), results supported a model in which a temperamental dimension, effortful control, positively predicted a specific behavioral tendency (i.e., prosociality) indirectly through mediation by a personality factor (i.e., ego-resiliency). Practical implications of the results are discussed in terms of the importance of early prevention efforts designed to enhance the capacity to cope effectively with emotional reactions and difficult situations.

Trajectories of prosocial behavior from adolescence to early adulthood: associations with personality change

The goal of this study was to identify heterogenic longitudinal patterns of change in prosocial behavior from adolescence to early adulthood and their association with change in Big Five Factor (BFF) personality traits from adolescence until early adulthood. Participants were 573 Italian adolescents aged approximately 13 at the first assessment and 21 at the last assessment. Using growth mixture modeling, low increasing (LI; 18%), medium quadratic (MQ; 26%), and high quadratic (HQ; 54%) trajectories of prosocial behavior were distinguished. Generally, the LI trajectory group predicted an increase in Conscientiousness over time, whereas the HQ trajectory group predicted greater change in Agreeableness and Openness. In addition, positive changes in Conscientiousness, Agreeableness, and Openness between ages 13 and 21 predicted a higher probability of belonging to the HQ prosocial group. Findings support a malleable perspective on personality and identify longterm positive pathways for youths' prosocial development.

Prevalence of mental health disorders among low-income African American adolescents

PURPOSE

Data on the prevalence of mental health disorders for low-income, urban African American adolescents are scarce. This study presents data about the burden of mental disorders for this understudied population.

METHODS

Mental disorders were assessed using the Diagnostic Interview Schedule for Children (C-DISC), Youth Self-Report (YSR), and Child Behavior Checklist (CBCL) among a sample of adolescents and their caregivers from very impoverished neighborhoods in a Southern city.

RESULTS

Based on the C-DISC, 3.8, 5.1 and 7.7% of adolescents met diagnostic criteria for major depression, post-traumatic stress disorder, and conduct disorder, respectively. There were significant differences among some of the mental health disorders based on adolescent and caregiver characteristics such as sex, school status, caregiver work status, and income level. We found a low prevalence of alcohol, marijuana, and substance abuse and dependence disorders.

CONCLUSIONS

Information about the prevalence of mental health disorders in specific communities and populations can assist in addressing unmet needs, planning for services and treatment, and reducing health disparities.

Developmental trajectories and predictors of externalizing behavior: a comparison of girls and boys

Recent studies have shown that the development of externalizing behavior in childhood and adolescence can be described through different developmental pathways. However, knowledge about differences between the sexes regarding the trajectories is limited. This study focused on potential differences by examining the trajectories of self-reported externalizing symptoms for girls and boys separately. In addition, the relationships of several familiar and child-specific variables with those developmental courses were assessed. The study was conducted on a large community sample of German youths (N = 3,893; mean age 11.38 years; 50 % girls) over 4 years. Using growth mixture modeling, three different classes of trajectories were found for both sexes. The classes differed with regard to the level and the course of symptoms ("low", "moderate", "high-decreasing"). Girls were overrepresented in the "low" class, whereas boys were predominant in the "moderate" and "high-decreasing" classes. The multiple group analysis revealed that the girls and boys differed significantly in their level and linear course of symptoms with regard to the "high-decreasing" class. In contrast, no sex differences were found in the growth factors of the "low" and "moderate" classes. The regression analyses showed that the children's depressive symptoms, dysfunctional parenting style, and negative family climate were associated significantly with the level and course of symptoms as well as the class membership of girls and boys. Life events predicted class membership only for boys, whereas maternal depressive symptoms and family conflict did not demonstrate any significant relationship. The sizes of the predictive associations with the growth factors were similar for both sexes. The results are discussed with regard to existing developmental models and their possible implications for prevention and future research.

Is ADHD a risk factor independent of conduct disorder for illicit substance use? A meta-analysis and metaregression investigation

OBJECTIVE

To investigate meta-analytically if the association between ADHD and illicit substance use (ISU) is maintained when controlling for conduct disorder/oppositional-defiant disorder (CD/ODD).

METHOD

A systematic literature review was conducted through Medline from 1980 to 2008. Data extracted and selections made by one author were reviewed by another.

RESULTS

Fifteen articles presented odds ratios (ORs) for the development of ISU in individuals with ADHD controlling for CD/ODD. In total, the study covered results for more than 1,000 individuals. The combined OR for studies that included in their analysis exclusively ISU was 1.35 (0.90-2.03), p = .15, heterogeneity = 55%. Lack of control for socioeconomic status was related with a weaker association between ADHD and ISU.

CONCLUSION

The existing data do not indicate that ADHD increases the risk of ISU beyond the effects of CD/ODD. However, the combination of all existing data is limited in power to detect a small increase in chance.

Childhood trajectories of inattention, hyperactivity and oppositional behaviors and prediction of substance abuse/dependence: a 15-year longitudinal population-based study

Numerous prospective studies have shown that children diagnosed with attention deficit/hyperactivity disorder (ADHD) are at higher risk of long-term substance abuse/dependence. However, there are three important limits to these studies: (a) most did not differentiate the role of hyperactivity and inattention; (b) most did not control for associated behavioral problems; and (c) most did not consider females. Our aim was to clarify the unique and interactive contributions of childhood inattention and hyperactivity symptoms to early adulthood substance abuse/dependence. Behavioral problems of 1803 participants (814 males) in a population-based longitudinal study were assessed yearly between 6 and 12 years by mothers and teachers. The prevalence of substance abuse/dependence at age 21 years was 30.7% for nicotine, 13.4% for alcohol, 9.1% for cannabis and 2.0% for cocaine. The significant predictors of nicotine dependence were inattention (odds ratio (OR): 2.25; 95% confidence interval (CI): 1.63-3.11) and opposition (OR: 1.65; 95%: 1.20-2.28). Only opposition contributed to the prediction of cannabis dependence (OR: 2.33; 95% CI: 1.40-3.87) and cocaine dependence (OR: 2.97; 95% CI: 1.06-8.57). The best behavioral predictor of alcohol abuse/dependence (opposition) was only marginally significant (OR: 1.38; 95% CI: 0.98-1.95). Frequent oppositional behaviors during elementary school were clearly the most pervasive predictors of substance abuse/dependence in early adulthood. The association of childhood ADHD with substance abuse/dependence is largely attributable to its association with opposition problems during childhood. However, inattention remained an important predictor of nicotine dependence, in line with genetic and molecular commonalities between the two phenotypes suggested in the literature.

Development and confirmatory factor analysis of the non-violent and violent offending behavior scale (NVOBS)

The purpose of this research was to develop a psychometrically sound measure of violent and non-violent offending, suitable for both male and female participants in general (non-forensic) samples. Potential items were selected from existing measures. A sample of 653 British university students completed all items, and their responses were analyzed using exploratory factor analysis and validated with confirmatory factor analysis. There were five separate factors (general violence, drug-related offenses, partner violence, theft, and criminal damage), which were confirmed with acceptable fit indices. The five-factor model applied to both males and females. Each subscale demonstrated good internal consistency, with alphas for each factor ranging from moderate to good. This new measure is a potentially valuable research tool for investigating people's involvement in violent and non-violent offending. The importance of examining the psychometric properties of scales, and confirming the category groupings using CFA of the items is outlined.

Dysregulated fear predicts social wariness and social anxiety symptoms during kindergarten

Fearful temperament is associated with risk for the development of social anxiety disorder in childhood; however, not all fearful children become anxious. Identifying maladaptive trajectories is thus important for clarifying which fearful children are at risk. In an unselected sample of 111 two-year-olds (55% male, 95% Caucasian), Buss ( 2011 ) identified a pattern of fearful behavior, dysregulated fear, characterized by high fear in low threat situations. This pattern of behavior predicted parent- and teacher-reported withdrawn/anxious behaviors in preschool and at kindergarten entry. The current study extended original findings and examined whether dysregulated fear predicted observed social wariness with adults and peers, and social anxiety symptoms at age 6. We also examined prosocial adjustment during kindergarten as a moderator of the link between dysregulated fear and social wariness. Consistent with predictions, children with greater dysregulated fear at age 2 were more socially wary of adults and unfamiliar peers in the laboratory, were reported as having more social anxiety symptoms, and were nearly 4 times more likely to manifest social anxiety symptoms than other children with elevated wariness in kindergarten. Results demonstrated stability in the dysregulated fear profile and increased risk for social anxiety symptom development. Dysregulated fear predicted more social wariness with unfamiliar peers only when children became less prosocial during kindergarten. Findings are discussed in relation to the utility of the dysregulated fear construct for specifying maladaptive trajectories of risk for anxiety disorder development.

Cohort profile: the Quebec Longitudinal Study of Kindergarten Children (QLSKC)

The Quebec Longitudinal Study of Kindergarten Children (QLSKC) is an ongoing population-based prospective longitudinal study presently spanning ages 6-29 years, designed to study the prevalence, risk factors, development and consequences of behavioural and emotional problems during elementary school. Kindergarten boys and girls attending French-speaking public schools in the Canadian province of Quebec during the 1986-87 and 1987-88 school years were included in the cohort: 2000 children representative of the population and 1017 children exhibiting disruptive behaviour problems. To date, 12 waves of data have been collected, and three generations of participants have been involved in the study (i.e. the study child, his parents and the first child of the study child). Information on demographics, psycho-social and lifestyle factors, child and family member characteristics (physical and mental health), and outcomes such as psychiatric diagnoses, delinquency or school diploma were assessed during three important developmental stages (childhood, adolescence and early adulthood). Blood samples were also collected in early adulthood for genetic analyses. Information on publications, available data and access to data can be found on the following website (http://www.gripinfo.ca/Grip/Public/www/).

Reconceptualizing antisocial deviance in neurobehavioral terms

We propose that neuroscientific understanding of antisocial behavior can be advanced by focusing programmatic efforts on neurobehavioral trait constructs, that is, individual difference constructs with direct referents in neurobiology as well as behavior. As specific examples, we highlight inhibitory control and defensive reactivity as two such constructs with clear relevance for understanding antisocial behavior in the context of development. Variations in inhibitory control are theorized to reflect individual differences in the functioning of brain systems that operate to guide and inhibit behavior and regulate emotional response in the service of nonimmediate goals. Variations in defensive reactivity are posited to reflect individual differences in the sensitivity of the brain's aversive motivational (fear) system. We describe how these constructs have been conceptualized in the adult and child literatures and review work pertaining to traditional psychometric (rating and behaviorally based) assessment of these constructs and their known physiological correlates at differing ages as well as evidence linking these constructs to antisocial behavior problems in children and adults. We outline a psychoneurometric approach, which entails systematic development of neurobiological measures of target trait constructs through reference to psychological phenotypes, as a paradigm for linking clinical disorders to neurobiological systems. We provide a concrete illustration of this approach in the domain of externalizing proneness and discuss its broader implications for research on conduct disorder, antisocial personality, and psychopathy.

Prevalence of women's violent and nonviolent offending behavior: a comparison of self-reports, victims' reports, and third-party reports

This study assessed women's violent and nonviolent offending, using data from two online student samples (men and women: n = 344), reporting on either being a perpetrator and witness (women) or being a victim and witness (men). A comprehensive measure of general violence, intimate partner violence (IPV), and nonviolent offending was collected. From women's self-reports, 59.9% reported perpetrating general violent offenses, 58.1% reported perpetrating IPV offenses and 85.6% reported perpetrating nonviolent offenses. Correlations showed that women were involved in a variety of offenses and demonstrated the interrelatedness of general violence and IPV, and of violent and nonviolent offenses. Regression analysis confirmed the close association between partner and general violence, and found that drug offenses were also related to the former and criminal damage to the latter. Overall, the prevalence data demonstrated women's involvement in all types of offending, and a similar pattern of offending was supported across data sources. Limitations of the sampling method and measures are discussed.

Feeling and thinking of others: affective and cognitive empathy and emotion comprehension in prosocial/hostile preschoolers

This study aims at investigating the affective and cognitive components of empathy in relation to both emotion comprehension and prosocial/hostile behaviors in preschoolers. A total of 219 children (54% boys; aged between 3 and 6: mean age 4.10) and 20 teachers (two for each class: group A and group B) took part in this research. Pupils' empathy and hostile/prosocial roles were assessed by teacher reports [Belacchi and Farina, 2010] and children's emotion comprehension by a nonverbal test [Test of Emotion Comprehension: Pons and Harris, 2000; adapted by Albanese and Molina; 2008]. As expected, the results showed a significant influence of gender, with girls being more empathic than boys, according to all of the teachers' perception. Contrary to our expectations, no systematic age influence emerged. Regarding the relations of children's emotion comprehension with both empathy measures and their prosocial/hostile attitudes, we have found: (1) a low significant relation with the total empathy measure, according to all the teachers, but with the cognitive empathy only according to teachers B; (2) a robust negative relationship of both affective and cognitive empathy with Hostile roles and with Outsider role, contrary to a positive correlation of only affective empathy with Prosocial roles. No relationships emerged between empathy measures and Victim role.

Impact of oppositional defiant disorder dimensions on the temporal ordering of conduct problems and depression across childhood and adolescence in girls

BACKGROUND

Little is known about the role of oppositional defiant disorder (ODD) dimensions on the temporal unfolding of conduct disorder (CD) and depression in girls between childhood and adolescence.

METHOD

The year-to-year associations between CD and depressive symptomatology were examined using nine waves of annually collected data (ages 8 through 16 years) from 1215 participants of the Pittsburgh Girls Study. A series of autoregressive path models were tested that included ODD-Emotion Dysregulation (ODD-ED) and ODD-Defiance, as time-varying covariates on CD predicting depression severity in the following year, and vice versa.

RESULTS

Conduct problems, depression, and ODD dimensions were relatively stable throughout childhood and adolescence, and a moderate degree of covariance was observed between these variables. Path analyses showed that CD often preceded depression across this developmental period, although the effect sizes were small. There was less consistent prediction from depression to CD. The overlap between ODD-ED and CD partially explained the prospective relations from CD to depression, whereas these paths were fully explained by the overlap between ODD-ED and depression. The overlap between ODD-Defiance and CD did not account for the prospective relations from CD to depression. In contrast, the overlap between ODD-Defiance and depression accounted for virtually all paths from CD to depression. Accounting for the overlap between ODD dimensions and both CD and depression eliminated all significant predictive paths.

CONCLUSIONS

Symptoms of CD tend to precede depression in girls during childhood and adolescence. However, covariance between depression and both ODD-ED and ODD-Defiance accounts for these prospective relations. ODD dimensions should be assessed when evaluating risk for comorbid depression in girls with conduct problems, and emotion dysregulation and defiance aspects of ODD should be identified as targets for treatment in order to prevent depression in the future.

Understanding the nature and etiology of intimate partner violence and implications for practice and policy

Theoretical perspectives underlying hypotheses about the nature and etiology of intimate partner violence are important as they inform professionals how they should best respond to reduce or eliminate this social problem. Therefore, it is crucial that practice led initiatives are driven by theory that is supported by good quality empirical evidence. This review aims to provide a synthesis of methodologically sound research to understand how intimate partner violence is best conceptualized, and what the implications of this evidence based theory hold for practice and policy. A wealth of evidence supporting the need to further explore and respond to the spectrum of partner violence from a gender inclusive perspective is demonstrated. Implications of the evidence for multidisciplinary work, prevention, assessment, treatment, and policy related to intimate partner violence are discussed.

Subclinical eating disorders and their comorbidity with mood and anxiety disorders in adolescent girls

The present study assesses the prevalence of subclinical eating disorders and examines their comorbidity with mood and anxiety disorders in a sample of adolescent girls. A DSM-III-R computerized self-reported interview was administered to 833 adolescent girls (mean age=15.7±0.5 years) from a population sample to assess the prevalence of subclinical eating disorders, major depression, dysthymia, separation anxiety, and generalized anxiety disorders. The prevalence of subclinical anorexia nervosa (restricting subtype) was 3.5%, 13.3% for weight concerns (restricting subtype), 3.8% for subclinical bulimia nervosa, and 10.8% for subclinical binge eating disorder. Girls with subclinical anorexia nervosa had a higher prevalence of separation anxiety diagnosis, and they reported significantly more major depressive and generalized anxiety symptoms compared with girls reporting no eating disorders. Girls with weight concerns reported significantly more major depressive, separation, and generalized anxiety symptoms compared with girls reporting no eating disorders. Girls with subclinical bulimia nervosa or binge eating disorder had a higher prevalence of mood disorders (major depression and dysthymia) compared with girls reporting no eating disorders. Furthermore, girls with subclinical bulimia nervosa or binge eating disorder also reported significantly more anxiety symptoms (separation anxiety and generalized anxiety) compared with girls reporting no eating disorders. In summary, adolescent girls suffering from subclinical eating disorders should be investigated concomitantly for mood and anxiety disorders while those suffering from mood and anxiety disorders should be investigated simultaneously for subclinical eating disorders.

Developmental trajectories of girls' and boys' delinquency and associated problems

Developmental trajectories in delinquency through adolescence were studied along with family and peer relationship problems. Drawing from eight waves of data over seven years, we conducted trajectory analyses with a sample of 746 students (402 girls; 344 boys). Analyzing girls and boys together, a five-class model emerged: 60% of the adolescents rarely reported delinquency; 27.7% reported low initial levels with moderate levels of delinquency over time; 6% in the late onset group reported initially low and rising levels of delinquency; 5% in the early onset group reported moderate initial levels which increased and then decreased in later adolescence. A small group of only boys (1.3%) labeled chronic reported high initial levels of delinquency that increased over time. Group comparisons revealed problems in internalizing, parent and peer relationship problems. The findings provide direction for early identification and interventions to curtail the development of delinquency.

Addressing, understanding and treating conduct disorders in adolescents through psychoanalysis and neuroscience: towards a disappearance of sex-differences

Based on our findings showing that female adolescents in resident group homes exhibit externalized disorders at the same rate as male adolescents, explanatory hypotheses are developed from neuroscience (genetics and endocrinology) and from psychoanalysis (psychopathological and environmental approach). In particular, the place of the psychoanalytic approach in improving our understanding of such results is discussed with regard first to the clinical context and then to the research context. This article underlines that both approaches in psychoanalysis and neuroscience can, and maybe have to/should, coexist in child psychiatry.

Differences and similarities in the serotonergic diathesis for suicide attempts and mood disorders: a 22-year longitudinal gene-environment study

To investigate similarities and differences in the serotonergic diathesis for mood disorders and suicide attempts, we conducted a study in a cohort followed longitudinally for 22 years. A total of 1255 members of this cohort, which is representative of the French-speaking population of Quebec, were investigated. Main outcome measures included (1) mood disorders (bipolar disorder and major depression) and suicide attempts by early adulthood; (2) odds ratios and probabilities associated with 143 single nucleotide polymorphisms in 11 serotonergic genes, acting directly or as moderators in gene-environment interactions with childhood sexual or childhood physical abuse (CPA), and in gene-gene interactions; (3) regression coefficients for putative endophenotypes for mood disorders (childhood anxiousness) and suicide attempts (childhood disruptiveness). Five genes showed significant adjusted effects (HTR2A, TPH1, HTR5A, SLC6A4 and HTR1A). Of these, HTR2A variation influenced both suicide attempts and mood disorders, although through different mechanisms. In suicide attempts, HTR2A variants (rs6561333, rs7997012 and rs1885884) were involved through interactions with histories of sexual and physical abuse whereas in mood disorders through one main effect (rs9316235). In terms of phenotype-specific contributions, TPH1 variation (rs10488683) was relevant only in the diathesis for suicide attempts. Three genes contributed exclusively to mood disorders, one through a main effect (HTR5A (rs1657268)) and two through gene-environment interactions with CPA (HTR1A (rs878567) and SLC6A4 (rs3794808)). Childhood anxiousness did not mediate the effects of HTR2A and HTR5A on mood disorders, nor did childhood disruptiveness mediate the effects of TPH1 on suicide attempts. Of the serotonergic genes implicated in mood disorders and suicidal behaviors, four exhibited phenotype-specific effects, suggesting that despite their high concordance and common genetic determinants, suicide attempts and mood disorders may also have partially independent etiological pathways. To identify where these pathways diverge, we need to understand the differential, phenotype-specific gene-environment interactions such as the ones observed in the present study, using suitably powered samples.

Predictors and sequelae of trajectories of physical aggression in school-age boys and girls

Teacher-rated trajectories of physical aggression in boys and girls from first through sixth grade were examined using data from the NICHD Study of Early Child Care and Youth Development. In separate analyses, four trajectories were identified in boys and three in girls. Higher levels of aggression in both boys and girls were related to greater sociodemographic risk and higher maternal harshness in the preschool years; lower levels of observed maternal sensitivity during early childhood also predicted higher trajectories of aggression among girls. Trajectory groups also differed on a range of social and academic adjustment outcomes in sixth grade, with the most aggressive children and even moderately aggressive children evidencing some difficulties in adjustment. Patterns and levels of aggression in boys and girls are discussed as are their predictors and consequences.

[Which are the recent clinical findings regarding the association between depression and suicide?]

OBJECTIVE

Suicide is one of the leading causes of mortality worldwide, especially among young subjects. Suicide is considered the outcome of a multidimensional and complex phenomenon, which is a result of the interaction between several factors. The association between psychopathology and suicide has been extensively investigated. Major depression plays an important role among the psychiatric diagnoses associated with suicide. This finding seems to be confirmed by different study designs, and in distinct populations. The present paper aims to briefly review the recent findings regarding the suicide-related clinical features of depression. Moreover, strategies for suicide prevention were also reviewed.

REVIEW

Recent references were identified and grouped in order to illustrate the main contributions about depression and suicide. Briefly, the literature review stresses the high prevalence of major depression among subjects presenting suicide behaviors. Psychopathological traits, such as aggression and impulsivity play a relevant role in triggering suicidal behaviors. Strategies for suicide prevention were also reviewed in Brazil and internationally. In general, detection and treatment are effective in reducing suicide rates.

CONCLUSION

Studies regarding suicide behaviors have had a pragmatic approach, and generated a large body of evidence about correlates of suicide. However, these studies have not been able to provide a consistent theoretical explanation for this phenomenon. The recent adoption of modern strategies represents a possibility of enhancing the research capability of such studies. In order to be clinically useful, findings should make it possible to deepen the understanding over the experience of a suicidal person, as well as to design specific strategies for prevention and treatment in population subgroups.

Gender differences in emotional reactivity of depressed and at-risk preschoolers: implications for gender specific manifestations of preschool depression

We investigated whether differences in positive and negative emotional reactivity could be found in depressed preschoolers and preschoolers at risk for later internalizing symptoms relative to nondepressed/low risk comparison groups. Observational measures of emotional reactivity, used to derive a score of the balance between anger and sadness, were obtained and analyzed in independent samples. One study utilized cross-sectional data from preschoolers (M age = 4.6 years) with a current depressive syndrome and two nondepressed comparison groups. The other study utilized longitudinal data that assessed emotional reactivity at preschool age (M age = 4.5 years) and later mental health symptoms during the transition to primary school, allowing a retrospective determination of risk. Depressed and at-risk boys displayed more anger than sadness in contrast to girls in the same groups and in contrast to no disorder/low-risk controls. This finding was detected in depressed and "at risk for internalizing" boys who were not comorbid for externalizing problems.

Prosocial development from childhood to adolescence: a multi-informant perspective with Canadian and Italian longitudinal studies

OBJECTIVES

To longitudinally describe prosocial behaviour development from childhood to adolescence, using multiple informants within Canadian and Italian samples.

METHOD

Participants in Study 1 were 1037 boys from low socioeconomic status (SES) areas in Montreal, Canada, for whom yearly teacher and mother reports were obtained between the ages of 10 and 15. Participants in Study 2 were 472 children (209 girls) from Genzano, Italy, for whom yearly self and teacher reports were obtained between the ages of 10 and 14. Developmental trajectories were estimated from ratings by each informant to identify subgroups of children following distinct courses of prosocial development.

RESULTS

In Study 1, three trajectory groups (low/declining 53%, high/declining 16%, high/steep declining 31%) were identified from teacher ratings, while five trajectories (low/stable 7%, low/declining 19%, moderate/stable 41%, high/declining 24%, high/stable 9%) were identified from mother ratings. Small but significant associations were observed between mother and teacher ratings. In Study 2, three trajectory groups (low/stable 9%, moderate/stable 50%, high/stable 42%) were identified from self-ratings, while four trajectory groups (low/stable 8%, moderate/declining 48%, high/declining 37%, increasing 7%) were identified from teacher ratings. Small but significant associations were observed between self- and teacher ratings.

CONCLUSIONS

The present studies investigated levels of prosocial behaviours from childhood to adolescence, using a multi-informant, cross-cultural perspective. All but one of the developmental trajectories identified were characterised by stable or declining levels of prosocial behaviours. Further research longitudinally investigating prosociality across developmental periods is needed to clarify prosocial behaviour development over time.

Childhood disruptive behaviour disorders: review of their origin, development, and prevention

OBJECTIVE

To review preventive studies of disruptive behaviour disorders (DBDs) in light of recent empirical knowledge on their development.

METHOD

We draw on the results of longitudinal studies of children starting in infancy to examine the onset, development, and risk factors for DBD symptoms. We review randomized controlled trials of preventive interventions provided to families before the child is aged 3 years, with reported outcome measures of DBD symptoms at follow-up.

RESULTS

Children who present high levels of DBD symptoms start to do so in the first 2 years of life and have risk factors that can be identified in the mother during pregnancy or even earlier, and shortly after the child's birth. Most preventive experiments have started relatively late after birth and have targeted parenting, with weak effects on children's DBDs. Preventive experiments that have provided intensive intervention to at-risk mothers starting during pregnancy have shown important effects in reducing key risk factors and some of the most severe consequences of DBDs. However, even those experiments have not succeeded in preventing childhood DBDs in the home and school contexts.

CONCLUSIONS

We suggest adopting a sequential, multitarget, intergenerational, experimental approach both to increase our knowledge about causal mechanisms and to increase our effectiveness in curbing DBDs and their serious lifelong consequences.

Outcomes of conduct problems in adolescence: 40 year follow-up of national cohort

OBJECTIVE

To describe long term outcomes associated with externalising behaviour in adolescence, defined in this study as conduct problems reported by a teacher, in a population based sample.

DESIGN

Longitudinal study from age 13-53.

SETTING

The Medical Research Council National Survey of Health and Development (the British 1946 birth cohort).

PARTICIPANTS

3652 survey members assessed by their teachers for symptoms of externalising behaviour at age 13 and 15.

MAIN OUTCOME MEASURES

Mental disorder, alcohol abuse, relationship difficulties, highest level of education, social class, unemployment, and financial difficulties at ages 36-53.

RESULTS

348 adolescents were identified with severe externalising behaviour, 1051 with mild externalising behaviour, and 2253 with no externalising behaviour. All negative outcomes measured in adulthood were more common in those with severe or mild externalising behaviour in adolescence, as rated by teachers, compared with those with no externalising behaviour. Adolescents with severe externalising behaviour were more likely to leave school without any qualifications (65.2%; adjusted odds ratio 4.0, 95% confidence interval 2.9 to 5.5), as were those with mild externalising behaviour (52.2%; 2.3, 1.9 to 2.8), compared with those with no externalising behaviour (30.8%). On a composite measure of global adversity throughout adulthood that included mental health, family life and relationships, and educational and economic problems, those with severe externalising behaviour scored significantly higher (40.1% in top quarter), as did those with mild externalising behaviour (28.3%), compared with those with no externalising behaviour (17.0%).

CONCLUSIONS

Adolescents who exhibit externalising behaviour experience multiple social and health impairments that adversely affect them, their families, and society throughout adult life.

Gene-environment interactions across development: Exploring DRD2 genotype and prenatal smoking effects on self-regulation

Genetic factors dynamically interact with both pre- and postnatal environmental influences to shape development. Considerable attention has been devoted to gene-environment interactions (G x E) on important outcomes (A. Caspi & T. E. Moffitt, 2006). It is also important to consider the possibility that these G x E effects may vary across development, particularly for constructs like self-regulation that emerge slowly, depend on brain regions that change qualitatively in different developmental periods, and thus may be manifested differently. To illustrate one approach to exploring such developmental patterns, the relation between variation in the TaqIA polymorphism, related to D2 dopamine receptor expression and availability, and prenatal exposure to tobacco was examined in two exploratory studies. First, in 4-week-old neonates, genotype-exposure interactions were observed for attention and irritable reactivity, but not for stress dysregulation. Second, in preschool children, genotype was related to Preschool Trail Making Test (K. A. Espy and M. F. Cwik, 2004) task performance on conditions requiring executive control; children with both the A1+ genotype and a history of prenatal tobacco exposure displayed disproportionately poor performance. Despite study limitations, these results illustrate the importance of examining the interplay between genetic and prenatal environmental factors across development.

Exploring gender issues in the development from conduct disorder in adolescence to criminal behaviour in adulthood

Using results from a large Norwegian follow-up study of former adolescent psychiatric in-patients we have traced the progression from mental disorders requiring hospitalisation in adolescence to registered criminal behaviour in adulthood, particularly highlighting gender differences. A nationwide representative sample of 1095 adolescent psychiatric inpatients (46% females) was followed up 15-33 years after admission to the National Centre for Child and Adolescent Psychiatry in Oslo, Norway. In adolescence 45% fulfilled the DSM-IV criteria for a disruptive behaviour disorder. At follow-up, 63% of the males and 39% of the females had a criminal record. Among females, psychoactive substance use disorder in adolescence seemed to be a sine qua non for later registered criminality, with intravenous drug use a potent risk factor for life-course-persistent criminality. The same strong association between drug use and criminality was not found in males. Factor analysis demonstrated that while the DSM-IV Conduct Disorder criteria structure was similar across genders, the prevalence of the various forms of expression was different in males and females. The differences between individuals with violent and non-violent crimes were more substantial in males than in females. There were marked gender differences in the criminal profiles observed, with the females' criminal career developing in a less serious manner than in males: females had later criminal debut, a lower number of acts on record, less diverse criminal behaviour, and an escalation in the severity of offences over time was less frequently encountered. However, secular trend analyses indicated that gender differences had diminished over the last several decades, with females "catching up" with their male counterparts. Overall, the results demonstrated important qualitative and quantitative gender differences in the criminal behaviour of former adolescent psychiatric in-patients. The results may be of use in prevention.

Early environment and major depression in young adults: a longitudinal study

Post-natal incubator care represents an early specific environment that may affect the risk for major depression later in life. A subsample of 1212 young adults from the French-speaking general population of the region of Quebec were selected from an ongoing longitudinal study that started during their kindergarten years. Information on peri-natal condition, obstetrical complications and incubator care was collected by consulting hospital medical records. Participants were evaluated using DSM III-R based psychiatric assessment when they were 15 and 21 years old. Incubator care predicted an approximate two- to three-fold decreased risk for depressive disorder at age 21. Results from three different logistic models adjusting for family adversity and for maternal depression confirmed this relationship. Analyses were replicated for depression at age 15, showing the same association in female adolescents. This study suggests that post-natal incubator care may paradoxically decrease the occurrence of major depression later in life. This protective effect might be direct (through optimized biological, physiological and sensory parameters) or indirect (induction of specific parent-child interactions due to the perception of their infant's vulnerability). This study could enhance understanding of the links between early post-natal environment and affective disorders later in life.

Female and male antisocial trajectories: from childhood origins to adult outcomes

This article reports on the childhood origins and adult outcomes of female versus male antisocial behavior trajectories in the Dunedin longitudinal study. Four antisocial behavior trajectory groups were identified among females and males using general growth mixture modeling and included life-course persistent (LCP), adolescent-onset, childhood-limited, and low trajectory groups. During childhood, both LCP females and males were characterized by social, familial and neurodevelopmental risk factors, whereas those on the adolescent-onset pathway were not. At age 32, women and men on the LCP pathway were engaging in serious violence and experiencing significant mental health, physical health, and economic problems. Females and males on the adolescent-onset pathway were also experiencing difficulties at age 32, although to a lesser extent. Although more males than females followed the LCP trajectory, findings support similarities across gender with respect to developmental trajectories of antisocial behavior and their associated childhood origins and adult consequences. Implications for theory, research, and practice are discussed.