Australian Temperament Project Research Articles

Maternal perinatal social support and infant social-emotional problems and competencies: a longitudinal cross-cohort replication study.

Maternal perinatal social support is theorised to promote offspring social-emotional development, yet few studies have prospectively examined this relationship. Findings may inform preventative intervention efforts, to support a healthy start to emotional life. This study examined whether maternal social support perinatally predicts infant social-emotional development at 12 months of age in two longitudinal cohort studies:The Australian Temperament Project (ATP) (n = 1,052 mother-infant dyads [653 mothers, M age_at_birth = 32.03, 88% Australian-born; 1,052 infants, 52% girls]) and TheTriple B Pregnancy Cohort Study (Triple B) (n = 1,537 dyads [1,498 mothers, M age_at_birth = 32.53, 56% Australian-born; 1,537 infants, 49% girls]). Social support was assessed at pregnancy (third trimester) and eight-weeks post-birth. Infant social-emotional competencies (ATP: Brief Infant and Toddler Social and Emotional Assessment (BITSEA), Competencies Scale; Triple B: Bayley Scales of Infant and Toddler Development-Social Emotional Scale) and problems (ATP: BITSEA, Problems Scale; Triple B: Ages and Stages Questionnaires: Social-Emotional Scale), were assessed at 12-months of age. In ATP, social support was associated with lower offspring problems (pregnancy: β = -0.15; post-birth: β = -0.12) and greater competencies (pregnancy: β = 0.12; post-birth: β = 0.16) at 12 months. In Triple B, social support alsopredicted lower offspring problems (pregnancy: β = -0.11; post-birth: β = -0.07) and greater competencies (pregnancy: β = 0.07) at 12 months. Findings did not indicate an association between support at eight-weeks post-birth and subsequent competencies (β = 0.06). Evidence suggests that perinatal social support promotes healthy infant social and emotional development. These results underscore the critical importance of social support for mothers transitioning into parenthood.

Adolescent School Belonging and Mental Health Outcomes in Young Adulthood: Findings from a Multi-wave Prospective Cohort Study

School belonging, sometimes referred to as school belonging or school connectedness, involves dimensions like positive affect towards school, relationships with teachers, and feeling socially valued. Previous research points to immediate benefits for students’ mental health and wellbeing; however, evidence on the potential long-term benefits of school belonging for mental health—once young people leave the school setting—is limited. This study used data on 1568 adults from the Australian Temperament Project (ATP), a 16-wave longitudinal study which has tracked participants since infancy. The short form of the Australian Council for Educational Research (ACER) School Life Questionnaire was used to assess secondary school belonging at age 15–16 years whilst young adult mental health symptoms were evaluated using the Depression, Anxiety and Stress Scales (DASS-21) at 19–20, 23–24, and 27–28 years. Generalised Estimating Equation models were used to examine the link between secondary school belonging and mental health symptoms in young adulthood. Results showed that higher levels of all aspects of school belonging were associated with lower mental health symptoms across young adulthood (β range − 0.05 to − 0.20). Associations were similar by gender. These findings underscore the importance of adolescent school belonging and in particular school status in reference to feeling socially valued, as a long-term protective factor that can mitigate against later depression, anxiety, and stress.

Adverse experiences in early intimate relationships and next‐generation infant–mother attachment: findings from the ATP Generation 3 Study

AbstractChronic insecurities that emerge from adverse experiences in early intimate partner relationships in adolescence and emerging adulthood can have profound impacts on mental health and well‐being. Less clear is the extent to which these experiences for parents impact subsequent relationships within and across generations. We examine the extent to which secure, dismissing, pre‐occupied, and fearful intimate partner relationships in adolescence and emerging adulthood, well before becoming a parent, are associated with next‐generation patterns of attachment between mothers and infant offspring. Data were drawn from a nested study of infant–mother attachment (n = 220) within the Australian Temperament Project Generation 3 Study (N = 1167, est. 1983). Intimate partner relationships in adolescence and young adulthood were assessed by self‐report at 23–24 years of age. Over a decade later, infant–mother attachment security was assessed at 12 months post‐partum. Young adult intimate partner relationships defined by high levels of fearful, pre‐occupied, and dismissing attachment styles were reported in 11%, 17%, and 38% of young mothers, respectively. Increases in fear of intimacy in relationships were associated with an increase in the odds, by around 50%, of infant–mother insecure attachments (vs secure; OR = 1.56, 95% CI = 1.07, 2.28) and disorganised attachments (vs organised; OR = 1.49, 95% CI = 1.00, 2.22). A mother's self‐reported history of fear of intimacy within young adult relationships predicts later insecure and disorganised mother–infant attachments. Guidance and greater support for young people navigating their earliest intimate relationships may not only prevent adverse relational experiences at the time but also on becoming a parent. Findings have relevance for family and infant mental health therapies. Translating these findings into supported conversations may help prevent infant–mother attachment difficulties, or later repair them, through validation of the lingering effects of early fear of intimacy and empowerment of parents to prevent next‐generation infant experiences of distrust.

Illicit Substance Use and Harm in Young Adulthood: the Role of Substance Use in Close Relationships and Individual Social Skills

AbstractTo examine illicit substance use across young adulthood and explore the extent to which social skills moderate the relationship between use and harm. 1,404 (761 women) from the Australian Temperament Project (est. 1983) participated across young adulthood (age 19–20, 23–24, and 27–28 years). Measures included self-reported illicit substance use/harm and social skills (i.e., assertion, empathy, responsibility, and self-control). The number and type of illicit substances used changed across young adulthood. Greater illicit substance use was associated with peer (OR = 4.96) and partner use (OR = 3.60). Moderation analyses suggested the risk relationship between the number of illicit substances used and harm was lower in those with high levels of assertion/self-control (ORassertion = 2.34, ORself-control = 2.60) compared to low levels (ORassertion = 4.43, ORself-control = 3.72). Evidence based programmes designed to strengthen individual social skills for young adults may play a role in protecting against the adverse effects of illicit substance use.

Multilevel Impacts of the COVID-19 Pandemic: A Bioecological Systems Perspective of Parent and Child Experiences

BackgroundThe coronavirus (COVID-19) pandemic and associated public health restrictions created unprecedented challenges for parents and their young dependent children. While psycho-social impacts of natural disasters on families are well studied, a typography of parent specific concerns in the COVID-19 context was yet to be articulated.ObjectiveUsing a bioecological systems framework, we adopted a mixed-methods research design to examine parents’ core concerns about the impacts of the pandemic on themselves and their children, testing for differences in concern foci of mothers compared with fathers.MethodData were drawn from the Australian Temperament Project Generation 3 (ATPG3) study, a prospective study of children born to a 40-year population-based cohort. During enforced COVID-19 lockdown restrictions between May to September 2020, ATPG3 parents (n = 516) were surveyed about their own and their children’s functioning in the context of the pandemic. Subject of qualitative content analysis, parents (n = 192) experiencing wellbeing concerns offered additional free-text responses about the nature of stress impacting themselves and their child/ren.ResultsParents reported far-reaching impacts for themselves and their children across multiple bioecological systems. Core concerns were for emotional rather than physical health, specifically, for parents this was represented by increased levels of anxiety and stress, and for children, these impacts were notable from a developmental perspective. Greater frequency of parenting related concern was expressed by mothers in comparison to fathers.ConclusionsFindings demonstrate the complex and interrelated nature of multi-systemic and gendered stressors impacting parents during the pandemic, and importantly point to modifiable risk factors which may inform early risk detection efforts.

Life course psychosocial precursors of parent mental health resilience during the COVID-19 pandemic: A three-decade prospective cohort study

BackgroundThere has been widespread interest in the implications of COVID-19 containment measures on the mental health of parents. Most of this research has focused on risk. Much less is known about resilience; yet such studies are key to protecting populations during major crises. Here we map precursors of resilience using life course data spanning three decades. MethodsThe Australian Temperament Project commenced in 1983 and now follows three generations. Parents (N = 574, 59 % mothers) raising young children completed a COVID-19 specific module in the early (May–September 2020) and/or later (October–December, 2021) phases of the pandemic. Decades prior, parents had been assessed across a broad range of individual, relational and contextual risk and promotive factors during childhood (7–8 years to 11–12 years), adolescence (13–14 years to 17–18 years) and young adulthood (19–20 years to 27–28 years). Regressions examined the extent to which these factors predicted mental health resilience, operationalised as lower than expected anxiety and depressive symptoms during the pandemic relative to pre-pandemic symptoms. ResultsParent mental health resilience during the COVID-19 pandemic was consistently predicted by several factors assessed decades before the pandemic. These included lower ratings of internalizing difficulties, less difficult temperament/personality traits and stressful life events, and higher ratings of relational health. LimitationsThe study included 37–39-year-old Australian parents with children age between 1 and 10 years. DiscussionResults identified psychosocial indicators across the early life course that, if replicated, could constitute targets for long-term investment to maximise mental health resilience during future pandemics and crises.

Is Neighborhood Nature an Ecological Precursor of Parenting Practices, Infant-Parent Bonding, and Infant Socioemotional Function?

Nurturing relationships are crucial for adaptive child development. The objectives of the study were to investigate whether nature availability was associated with early nurturing parenting practices, mother-infant bonding, and infant socioemotional function. Data were from the Australian Temperament Project ( n = 809 infants to 515 parents residing in Victoria, Australia) and were linked cross-sectionally to residential greenness (i.e., Normalized Difference in Vegetation Index). There were no observable associations between residential greenness within a 1,600 m network radius and parenting practices, mother-infant bonding, or infant socioemotional function. The findings were largely corroborated by sensitivity analyses (i.e., NDVI within 100, 250, 500, and 1,000 m and distance to park). Shorter distances to a park were associated with less hostile parenting. More residential greenness (1,000 and 1,600 m) was associated with stronger father-infant bonding and more hostile parenting amongst the most stressed parents in exploratory analyses. Residential greenness might be a socioecological precursor for father-infant bonding.

Eating and Body Image Disturbances in Adolescence and Substance Use Throughout Young Adulthood: Findings from the Australian Temperament Project

Abstract We investigated whether eating and body image disturbances in mid-adolescence were associated with substance use in young adulthood. Participants (n = 1566) completed the drive for thinness, bulimic behavior, and body dissatisfaction subscales from the Eating Disorder Inventory during adolescence (15–16 years), and reported frequencies of substance use (tobacco, cannabis, binge drinking, other illicit substances) across young adulthood (19–20, 23–24, and 27–28 years). Adolescent body dissatisfaction was associated with a 10% increase in the rate of binge drinking and tobacco smoking, with effects being of similar magnitude in men and women, and across young adulthood. The association between bulimic behavior and tobacco smoking was strongest in the earlier years of young adulthood (19–20 years). Relationships between cannabis use, bulimic behavior, and body dissatisfaction were evident in men only. Findings highlight important targets for prevention programs, as well as focused monitoring efforts to identify individuals at risk of later substance use.

The Australian Temperament Project Generation 3 study: a population-based multigenerational prospective cohort study of socioemotional health and development

PurposeThe Australian Temperament Project Generation 3 Study (ATPG3) was established to examine the extent to which offspring social and emotional development is shaped in the decades prior to conception, in...

The Legacy of Mental Distress Following Physical Illness in Childhood: Findings From the Australian Temperament Project.

Childhood physical illnesses have been associated with heightened risk for mental health problems in adolescence and young adulthood; however, little is known about the natural history of this relationship. Here, we examine the nature of mental health adjustment to illness from diagnosis in childhood into adolescence and young adult life. Data were drawn from a large population-based cohort. Parents reported whether their child had a physical illness at 5-6 and 7-8 years and whether they believed their child was so sick it was thought they might die. Depression and anxiety symptoms were reported by parents (for children 7-10 years) and self-reports (11-28 years). A total of 1,001 (56%) parents reported their child had a physical illness. Of these parents, 143 (8%) believed their child might die. Findings indicated there was some evidence of higher levels of depressive and anxious symptoms across late childhood and into early adolescence for those reporting a physical illness in childhood. A similar pattern was observed for those who were so sick it was thought they might die, although symptoms were elevated to a greater extent. Although physical illness in middle childhood is associated with higher levels of depressive and anxious symptoms, by early adolescence, these differences diminish, indicating a process of adaptation that persists into young adulthood. This suggests a potentially sensitive period of adjustment to illness for some, especially for children who it was feared might die. Additional psychosocial assessment and support may be warranted across the "acute" illness period.

Parental history of positive development and child behavior in next generation offspring: A two-cohort prospective intergenerational study.

This study examined whether positive development (PD) in adolescence and young adulthood predicts offspring behavior in two Australasian intergenerational cohorts. The Australian Temperament Project Generation 3 Study assessed PD at age 19-28 (years 2002-2010) and behavior in 1165 infants (12-18 months; 608 girls) of 694 Australian-born parents (age 29-35; 2012-2019; 399 mothers). The Dunedin Multidisciplinary Health and Development Parenting Study assessed PD at age 15-18 (years 1987-1991) and behavior in 695 preschoolers (3-5years; 349 girls) and their New Zealand born parents (age 21-46; 1994-2018; 363 mothers; 89% European ethnicity). In both cohorts, PD before parenthood predicted more positive offspring behavior (βrange =.11-.16) and fewer behavior problems (βrange =-.09 to -.11). Promoting strengths may secure a healthy start to life.

Inequalities in the distribution of COVID-19-related financial difficulties for Australian families with young children.

BackgroundWe examine (1) the frequency of financial difficulties in Australian families with young children (0–8 years) in the early and later phases of the pandemic; (2) the extent to which parents' pre‐pandemic socio‐economic disadvantage (SED) predicted financial difficulties; and (3) whether grandparent intergenerational SED further amplified this risk.Method Data: Australian Temperament Project (ATP; established 1983, N = 2443) and ATP Generation 3 study (ATPG3; established 2012; N = 702), of which 74% (N = 553) completed a COVID‐specific module in the early (May–September 2020) and/or later (October–December 2021) phases of the pandemic. Outcomes: Parent‐reported loss of employment/reduced income, difficulty paying for essentials, and financial strain. Exposures: Pre‐pandemic parent and grandparent education and occupation. Analysis: Logistic regressions, estimated via generalized estimating equations, were used to examine associations between the pre‐pandemic SED of parents and grandparents and their interaction with financial difficulties, adjusting for potential confounders.ResultsAt both pandemic time points, a third of parents reported adverse financial impacts (early: 34%, 95% confidence interval [CI] = 30–38; later: 32%, 95% CI = 28–36). Each standard deviation increase in the parents' pre‐pandemic SED was associated with a 36% increase in the odds of reporting multiple financial difficulties (odds ratio [OR] = 1.36, 95% CI = 1.04–1.78). There was little evidence of an interaction between the SED of parents and grandparents.ConclusionsFinancial impacts related to the COVID‐19 pandemic were common and, irrespective of grandparent SED, disproportionately borne by parents with higher pre‐pandemic SED. Given the well‐established relationship between disadvantage and child health and development, sustained and well‐targeted government supports will be critical to minimizing adverse impacts in years to come.

Continuities in maternal substance use from early adolescence to parenthood: findings from the intergenerational cohort consortium.

This study assessed the extent to which women's preconception binge drinking, tobacco use and cannabis use, reported prospectively in adolescence and young adulthood, predicted use of these substances during pregnancy and at 1 year postpartum. Data were pooled from two intergenerational cohort studies: the Australian Temperament Project Generation 3 Study (395 mothers, 691 pregnancies) and the Victorian Intergenerational Health Cohort Study (398 mothers, 609 pregnancies). Alcohol, tobacco and cannabis use were assessed in adolescence (13-18 years), young adulthood (19-29 years) and at ages 29-35 years for those transitioning to parenthood. Exposures were weekly or more frequent preconception binge drinking (5 + drinks in one session), tobacco use and cannabis use. Outcomes were any alcohol, tobacco and cannabis use prior to awareness of the pregnancy, after awareness of pregnancy (up to and including the third trimester pregnancy) and at 1 year postpartum. Frequent preconception binge drinking, tobacco use and cannabis use across both adolescence and young adulthood were strong predictors of continued use post-conception, before and after awareness of the pregnancy and at 1 year postpartum. Substance use limited to young adulthood also predicted continued use post-conception. Persistent alcohol, tobacco use and cannabis use that starts in adolescence has a strong continuity into parenthood. Reducing substance use in the perinatal period requires action well before pregnancy, commencing in adolescence and continuing into the years before conception and throughout the perinatal period.

Preparing for Future Adversities: Lessons From the COVID-19 Pandemic in Australia for Promoting Relational Resilience in Families.

Background: The COVID-19 pandemic has placed considerable pressure on families, testing the quality of relationships and the strength of social support within and beyond the family network. However, little is known about the pre-pandemic factors that predict family relational resilience and social functioning during times of natural disaster or global crisis. Here we use data from one of Australia's longest running studies of social and emotional development to examine the nature and timing of possible relational and social support intervention aimed at preparing families for future adversities.Methods: Data were from the Australian Temperament Project Generation 3 (ATPG3) Study, a population representative three generation cohort study of families established in 1983. A subset of Generation 2 parents completed a COVID-19 specific survey in May-September 2020 (502 parents of 871 children; 60% mothers; 37–38 years). These participants had completed the Quality of Relationships Inventory to assess social support during young adulthood, at 23–24 years (2006) and 27–28 years (2010), before next generation conception. Participants had also completed the Maternity Social Support Scale 1 year postpartum for each child born across the ATPG3 assessment period (2012–2019). In 2020, during the height of the Australian lockdowns, participants rated the quality of their relationships with their partners, children and broader family and friends, in addition to social support within and extended beyond their family.Results: Pre-pandemic partner support was associated with partner relationship quality during the pandemic (β = 0.22). Pre-pandemic support from friends was associated with relationship quality with other family and friends during the pandemic (β = 0.12 – 0.18). Pre-pandemic support (from partner, family and friends) was consistently associated with social support within families during the pandemic (β = 0.11 – 0.21). Pre-pandemic support from friends was also associated with family support extended to others within their local community during the pandemic (β = 0.12 – 0.13).Conclusions: Strengthening supportive relationships during major life transitions, prior to the start of family life and in early parenthood, may have long-term and intergenerational benefits years into the future for both families and communities. This may promote resilience during future crises and other more normative stressful life events.

Psychosocial predictors of binge-drinking residual harm in adolescence and young adulthood: Findings from the Australian Temperament Project

AimsWe examine the extent to which adolescent and young adult psychosocial factors are associated with variation in the experience of common types of harm (e.g., injuries, violence, sexual regrets) with respect to binge-drinking frequency – termed residual harm. MethodsData were from the Australian Temperament Project, a population-based cohort study that has followed a sample of young Australians from infancy to adulthood since 1983. The current sample comprised 1,081 (565 women). Residual harm was operationalised by saving residuals from models regressing number of alcohol harms onto binge-drinking frequency at each of 5 waves, two in adolescence (15–16 and 17–18 years) and three in young adulthood (19–20, 23–24, and 27–28 years). Psychosocial factors (mental health, social skills, quality of parent and peer relationships) were assessed prior to binge drinking in early adolescence (13–14 years) and then again in young adulthood (19–20 years). ResultsAdolescent predictors of decreased residual harm were lower depressive symptoms, and higher cooperation, self-control, and peer and parent attachment. Young adult predictors of decreased residual harm were lower depressive, anxiety, and stress symptoms and peer and parent negative appraisal, and higher responsibility, and peer and parent emotional support. Associations were evident in males and females, although the strength of some associations diminished with age. ConclusionsAdolescents and young adults with better mental health, social skills, and relationship quality experienced less harm with respect to their binge-drinking frequency. Future research should examine the potential of investment in strength-based interventions for young people.

A comparison of penalised regression methods for informing the selection of predictive markers

Penalised regression methods are a useful atheoretical approach for both developing predictive models and selecting key indicators within an often substantially larger pool of available indicators. In comparison to traditional methods, penalised regression models improve prediction in new data by shrinking the size of coefficients and retaining those with coefficients greater than zero. However, the performance and selection of indicators depends on the specific algorithm implemented. The purpose of this study was to examine the predictive performance and feature (i.e., indicator) selection capability of common penalised logistic regression methods (LASSO, adaptive LASSO, and elastic-net), compared with traditional logistic regression and forward selection methods. Data were drawn from the Australian Temperament Project, a multigenerational longitudinal study established in 1983. The analytic sample consisted of 1,292 (707 women) participants. A total of 102 adolescent psychosocial and contextual indicators were available to predict young adult daily smoking. Penalised logistic regression methods showed small improvements in predictive performance over logistic regression and forward selection. However, no single penalised logistic regression model outperformed the others. Elastic-net models selected more indicators than either LASSO or adaptive LASSO. Additionally, more regularised models included fewer indicators, yet had comparable predictive performance. Forward selection methods dismissed many indicators identified as important in the penalised logistic regression models. Although overall predictive accuracy was only marginally better with penalised logistic regression methods, benefits were most clear in their capacity to select a manageable subset of indicators. Preference to competing penalised logistic regression methods may therefore be guided by feature selection capability, and thus interpretative considerations, rather than predictive performance alone.

Exploring a causal model in observational cohort data: The role of parents and peers in shaping substance use trajectories

AimsTo explore the process of applying counterfactual thinking in examining causal determinants of substance use trajectories in observational cohort data. Specifically, we examine the extent to which quality of the parent-adolescent relationship and affiliations with deviant peers are causally related to trajectories of alcohol, tobacco, and cannabis use across adolescence and into young adulthood. MethodsData were drawn from the Australian Temperament Project, a population-based cohort study that has followed a sample of young Australians from infancy to adulthood since 1983. Parent-adolescent relationship quality and deviant peer affiliations were assessed at age 13–14 years. Latent curve models were fitted for past month alcohol, tobacco, and cannabis use (n = 1590) from age 15–16 to 27–28 years (5 waves). Confounding factors were selected in line with the counterfactual framework. ResultsFollowing confounder adjustment, higher quality parent-adolescent relationships were associated with lower baseline cannabis use, but not alcohol or tobacco use trajectories. In contrast, affiliations with deviant peers were associated with higher baseline binge drinking, tobacco, and cannabis use, and an earlier peak in the cannabis use trajectory. ConclusionsDespite careful application of the counterfactual framework, interpretation of associations as causal is not without limitations. Nevertheless, findings suggested causal effects of both parent-adolescent relationships and deviant peer affiliations on the trajectory of substance use. Causal effects were more pervasive (i.e., more substance types) and protracted for deviant peer affiliations. The exploration of causal relationships in observational cohort data is encouraged, when relevant limitations are transparently acknowledged.

Adolescent antecedents of maternal and paternal perinatal depression: a 36-year prospective cohort.

Rates of common mental health problems (depression/anxiety) rise sharply in adolescence and peak in young adulthood, often coinciding with the transition to parenthood. Little is known regarding the persistence of common mental health problems from adolescence to the perinatal period in both mothers and fathers. A total of 393 mothers (686 pregnancies) and 257 fathers (357 pregnancies) from the intergenerational Australian Temperament Project Generation 3 Study completed self-report assessments of depression and anxiety in adolescence (ages 13-14, 15-16, 17-18 years) and young adulthood (ages 19-20, 23-24, 27-28 years). The Edinburgh Postnatal Depression Scale was used to assess depressive symptoms at 32 weeks pregnancy and 12 months postpartum in mothers, and at 12 months postpartum in fathers. Most pregnancies (81%) in which mothers reported perinatal depression were preceded by a history of mental health problems in adolescence or young adulthood. Similarly, most pregnancies (83%) in which fathers reported postnatal depression were preceded by a preconception history of mental health problems. After adjustment for potential confounders, the odds of self-reporting perinatal depression in both women and men were consistently higher in those with a history of persistent mental health problems across adolescence and young adulthood than those without (ORwomen 5.7, 95% CI 2.9-10.9; ORmen 5.5, 95% CI 1.03-29.70). Perinatal depression, for the majority of parents, is a continuation of mental health problems with onsets well before pregnancy. Strategies to promote good perinatal mental health should start before parenthood and include both men and women.

The Australian and New Zealand Intergenerational Cohort Consortium: a study protocol for investigating mental health and well-being across generations

The Australian New Zealand Intergenerational Cohort Consortium (ANZ-ICC) brings together three of the longest running intergenerational cohort studies in Australia and New Zealand to examine the extent to which preconception parental life histories (from infancy to parenthood) predict next generation early health and development. The aims are threefold: (1) to describe pathways of advantage that strengthen emotional health and well-being from one generation to the next, (2) to describe pathways of disadvantage that perpetuate cycles of emotional and behavioural problems across generations, and (3) to identify modifiable factors capable of breaking intergenerational cycles. The Victorian Intergenerational Health Cohort Study has followed 1,943 young Australians from adolescence to adulthood across ten waves since 1992, and 1,030 offspring from pregnancy to early childhood since 2006. The Australian Temperament Project Generation 3 Study has followed 2,443 young Australians from infancy to adulthood across 15 waves since 1983, and 1170 offspring from pregnancy to early childhood since 2012. The Dunedin Multidisciplinary Health and Development Study Parenting Study has followed 1,037 young New Zealanders across 15 waves since 1972, and 730 offspring in early childhood since 1994. Cross-cohort replication analyses will be conducted for common preconception exposures and next generation offspring outcomes, while integrated data analysis of pooled data will be used for rare exposures and outcomes. The ANZ-ICC represents a unique collaboration that bridges the disciplines of lifecourse epidemiology, biostatistics, developmental psychology and psychiatry, to study the role of parental preconception exposures on next generation health and development.

Social mediators of relationships between childhood reading difficulties, behaviour problems, and secondary school noncompletion

BackgroundChildhood reading difficulties (RDs) and behaviour problems (BPs) are well‐established predictors of secondary school noncompletion. However, few studies have examined the risk of secondary school noncompletion for children with differing combinations of the two childhood problems. Even less is known about potential mediators of relationships between the two childhood problems and secondary school noncompletion.AimsThis study examined whether key indicators of social connectedness—adolescent school engagement, and family and peer attachment—mediated relationships between childhood RDs and BPs and secondary school noncompletion.SampleData were drawn from the Australian Temperament Project, a longitudinal study that has followed a large community sample across 16 waves from infancy to adulthood.MethodsUsing standard reading and BP assessments, four childhood exposure groups were identified at 7–8 years: RDs‐only, BPs‐only, RDs + BPs, and Neither Problem.ResultsBoth groups with prior BPs had significantly poorer early‐adolescent school engagement, and family and peer attachment than the RDs‐only and Neither groups. School engagement mediated the relationship between childhood BPs and secondary school noncompletion but there was no evidence of similar mediation by family or peer attachment. Adolescent social connections did not mediate the effects of childhood RDs.ConclusionsThe adverse long‐term consequences of childhood BPs on secondary school noncompletion may be alleviated by targeting adolescent school engagement. Intervention implications are discussed.