External Publications Using GUI Data

This report uses data collected on Cohort ’98 of the Growing Up in Ireland (GUI) study at 9, 13 and 171 years of age to examine the individual, family, peer, school and neighbourhood factors associated with adolescent behaviour patterns. The study adopts a multidimensional approach and draws on multiple informants, looking at six types of behaviour. Externalising behaviour relates to conduct (‘acting out’) and concentration difficulties. Internalising behaviour relates to negativity directed towards the self (i.e. mood or emotional difficulties) and difficulties interacting with peers, while prosocial behaviour is an indicator of positive development, reflecting positive interaction with others. All three are measured using the Strengths and Difficulties Questionnaire (SDQ), are based on reports from the primary caregiver (usually, the mother2) and are therefore likely to capture behaviour within the family or home context. Behaviour at school is captured using information on school-based misbehaviour (such as ‘messing’ in class) and on truancy, reported by the young person themselves. Antisocial behaviour, also based on the young person’s report, reflects behaviour in the wider community (such as graffiti or damaging property). The study addresses the following research questions: 1. What patterns of (mis)behaviour are found among young people at 9, 13 and 17 years of age? To what extent do these patterns relate to differences in family resources, namely, social class, parental education and household income? 2. To what extent does adolescent behaviour reflect the social mix of the school, over and above the effects of individual family background (including parental education, income and social class)? 3. To what extent does adolescent behaviour reflect the social composition of the neighbourhood, over and above the effects of individual family background? 4. What family, peer, school and neighbourhood factors help to reduce the incidence of behaviour difficulties among young people?

This report uses data from the ‘98 cohort of Growing Up in Ireland (GUI) to examine when, where and how young people receive information on sex and relationships, and the role of this information in shaping sexual competence (or readiness) and behaviours among Irish adolescents.

This retrospective cross-sectional paper examines the relationship between early breastfeeding exposure and children’s academic test scores at nine years of age independent of a wide range of possible confounders. The final sample comprised 8226 nine-year-old school children participating in the first wave of the Growing Up in Ireland study. The children were selected through the Irish national school system using a 2-stage sampling method and were representative of the nine-year population. Information relating to breastfeeding initiation and exposure duration was obtained retrospectively at nine years of age via parental recall and children’s academic performance was assessed using standardised reading and mathematics tests. Hierarchical linear regression analysis with robust standard errors to control for clustering at the school level was used to quantify the effect of breastfeeding on children’s test scores. Propensity score matching was used to compare treatment effects across groups defined by their propensity to breastfeed. In unadjusted analysis, children who were breastfed scored 8.67 percentage points higher on reading and 7.42 percentage points higher on mathematics compared to those who were never breastfed. While the breastfeeding advantage attenuated appreciably when adjusted for a range of child, maternal, socio-economic and socio-environmental characteristics, children who were breastfed continued to enjoy a significant test score advantage of 3.24 (p < 0.001) and 2.23 (p < 0.001) percentage points on reading and mathematics respectively compared to those who were never breastfed. Any amount of breastfeeding was associated with significantly higher test scores than no exposure, but evidence of a dose-response relationship was weak. The results of the propensity score matching analysis indicated that the test score advantage of breastfed children is robust and that the magnitude of the effect varies across groups defined by their propensity to breastfeed, being largest amongst the most socially disadvantaged and falling to near zero among the most advantaged group.

This retrospective cross-sectional paper examines the relationship between maternal smoking during pregnancy and children’s behavioural problems at 9 years of age independent of a wide range of possible confounders. The final sample comprised 7,505 nine-year-old school children participating in the first wave of the Growing Up in Ireland study. The children were selected through the Irish national school system using a 2-stage sampling method and were representative of the nine-year population. Information on maternal smoking during pregnancy was obtained retrospectively at 9 years of age via parental recall and children’s behavioural problems were assessed using the Strengths and Difficulties Questionnaire across separate parent and teacher-report instruments. A quasi-experimental approach using propensity score matching was used to create treatment (smoking) and control (non-smoking) groups which did not differ significantly in their propensity to smoke in terms of 16 observed characteristics. After matching on the propensity score, children whose mothers smoked during pregnancy were 3.5 % (p < 0.001) and 3.4 % (p < 0.001) more likely to score in the problematic range on the SDQ total difficulties index according to parent and teacher-report respectively. Maternal smoking during pregnancy was more strongly associated with externalising than internalising behavioural problems. Analysis of the dose–response relationship showed that the differential between matched treatment and control groups increased with level of maternal smoking. Given that smoking is a modifiable risk factor, the promotion of successful cessation in pregnancy may prevent potentially adverse long-term consequences.

This study draws on data on Growing Up in Ireland (GUI) Cohorts ’98 and ’08 to document changes in the lives of adolescents over the period 2011/12 to 2021/22, building on an earlier study (Smyth, 2022) which compared their experiences at nine years of age. This decade was a period of considerable social and policy change, including reform of the junior cycle, growing digitalisation and the disruption of the pandemic to all aspects of young people’s lives. Changes were also evident in the profile of young people and their families, with increasing cultural diversity, higher education levels among parents, lower levels of financial strain and increasing numbers with a disability among members of Cohort ’08 than among their older cohort counterparts. The study looks at changes in 13-year-olds’ relationships with their parents and peers, in their day-to-day activities and in their experiences of school. The main research questions addressed by the study are: How have the quality of relationships, experience of learning and activities engaged in by adolescents changed over the course of a decade? To what extent do any such changes reflect differences in the family characteristics of the young people? Are any such changes more evident for boys or girls or for young people from different social backgrounds? Is differentiation by gender and social background in adolescents’ social worlds less evident for the younger cohort than previously?

This study examined the role of neighbourhood characteristics in explaining socioeconomic inequalities in child mental health (the total difficulties score from the Strengths and Difficulties Questionnaire) using data from Cohort ’08 of Growing Up in Ireland Waves 3 (age 5; baseline) and 5 (age 9; follow-up). Twenty neighbourhood items were grouped into neighbourhood safety, built environments, cohesion, interaction, and disorder. Data were analysed using regression, single and multiple mediation, and network psychometric analyses. We found that neighbourhood safety, cohesion, interaction, and disorder were associated with child mental health. These four domains separately (by up to 18 %) or in concert (by up to 23 %) partially explained socioeconomic inequalities in child mental health. Built environments may explain socioeconomic inequalities in mental health in urban children only. Findings from network analysis indicated that specific concerns over “people being drunk or taking drugs in public” and “this is a safe neighbourhood” had the strongest connections with child mental health. Improving neighbourhood characteristics may be important to reduce socioeconomic inequalities in child mental health in Ireland.

This study examined whether being breastfed predicts handedness. Two large representative samples from Britain (n=13,421) and Ireland (n=8,426) were used. Multivariate probit models are estimated, reporting the marginal effects of covariates on the probability of a child being right-handed. For both datasets, children who have been breastfed for a minimum period (between 1 month and 6 weeks) are significantly less likely to be left-handed. The results are robust to a variety of controls. Hence breastfeeding is an environmental factor that predicts handedness in a non-linear way, although the mechanism is unknown.

Keywords: Breastfeeding; Lactation;b Handedness; Laterality

This study examines how the presence of outdoor areas such as parks and playgrounds affects children’s well-being and how this effect is moderated by families’ socioeconomic status. Specifically, I aim to answer two research questions. First, does the presence of outdoor areas in children’s neighborhoods affect their well-being? Second, is there a differential effect depending on children’s socioeconomic status? The main part of the study uses data from the International Survey of Children’s Well-Being. The results suggest that the presence of outdoor areas in children’s neighborhoods has a positive effect on their well-being. In addition, the estimated effect of outdoor areas is larger for children from families with low socioeconomic status. Finally, findings from the Growing Up in Ireland data set suggest that children’s mental problems are a plausible mechanism through which outdoor areas affect children’s well-being. These findings have meaningful policy implications. Efforts to provide access to appropriate outdoor areas may be more likely to benefit disadvantaged children and thus reduce inequality in children’s well-being.

This study identified ways to improve the social and educational outcomes of children with disabilities, including informing parents about the school and post-school options available.

This study investigated trajectories of concomitant internalising, externalising, and peer problems, and associated risk factors for group-membership, using a person-centered approach to better understand heterogeneity in subgroups identified. A cohort of 7,507 children in Ireland was followed from infancy to late childhood (50.3%, males; 84.9% Irish). The parent-version of the Strengths and Difficulties Questionnaire was used when children were 3, 5, 7 and 9 years of age. Information on antecedent risk factors was collected when children were 9 months. Group-based multi-trajectory modelling and multinomial logistic regression were used. Six subgroups of children with distinct profiles were identified, evidencing both homotypic and heterotypic comorbidity. No support of a ‘pure’ internalising, externalising or peer problems group was found in any identified trajectory group. Difficulties in one problem domain indicated the presence of difficulty in another problem domain for all children in elevated groups. Risk factors associated with group-membership were complex, with only three common factors across elevated groups: prenatal exposure to smoking, maternal education, and maternal stress. Specific risk factors for group-membership included low birth weight, sex, maternal age, maternal depression, family composition, social class, medical card status and quality of attachment. Despite some overlap in predictors, the combination of predictors specific to each group would suggest tailored programming. For children with the most acute problems, programming targets should include families with boys, born with low birth weight, exposed to smoking prenatally, with mothers who have lower levels of education, postnatal depression, increased stress and fewer financial resources.

This study investigates the long-term effects of victimization from middle adolescence to late adolescence and early adulthood, examining emotional and behavioral problems, peer relationships, and smoking habits and sleeping difficulties. The study also explores how these outcomes can persist into early adulthood, taking into consideration early victimization experiences, gender, cognitive ability, and family social class. The total sample included 7525 participants, spanning the ages of 13, 17, and 20, from the Child Cohort of the Growing Up in Ireland study (48.9% male). The path analysis model suggests that victimization is associated with behavioral problems at age 17, and it is also linked to emotional problems and sleeping difficulties at both ages 17 and 20. Additionally, sleeping difficulties, smoking habits, and indices of emotional and behavioral adjustment exhibit some stability between ages 13 and 17, as well as 17 and 20. Theoretical and practical implications are discussed.

This study investigates the relationship between multidimensional household poverty and cognitive and behavioural development during the formative years of childhood (from 9 months to 9 years), using nationally representative longitudinal data from Ireland for the cohort of children born in 2007-2008. The results indicate substantial inequalities in Irish children’s cognitive and behavioural outcomes at age 9 by multidimensional poverty duration. Children with at least one spell in poverty (out of four interviews) have worse cognitive and behavioural outcomes. Dynamic structural equation models provide evidence in support of a hybrid family investment/family stress model. Although family investment processes account for some of the cumulative effects of childhood poverty on cognitive outcomes, family stress processes help explain the links between poverty and both cognitive and behaviour outcomes in early childhood. Overall, poverty is strongly related to child outcomes over time via the direct effects of current poverty on child outcomes and path dependency in both poverty and child outcomes over time. There are also indirect effects via the two child outcomes reinforcing each other as children grow older (with the effects of behaviour problems dominating those of cognitive ability), even as the parental investment and maternal stress pathways become less pronounced.

Keywords
Early childhood, child poverty, cognitive ability, behaviour problems, growing up in Ireland

This study is based on the first wave of data on the child cohort (nine year-olds) in the Growing Up in Ireland (GUI) survey. It examines family relationships and their associations with parent and child well-being in the families of the nine year-olds and explores social inequalities in these aspects of family circumstances. The analysis is presented under five headings: the structure of families (a term which encompasses family structure both currently and over time and also includes family size), relationship quality between parents, the individual well-being of parents, relationship quality between parents and children, and the well-being of children.

This study reports recent trends in periconceptional folic acid use in Ireland using archived data from Growing Up in Ireland – the National Longitudinal Study of Children. Of a sample of 10,891 mothers, 6,936 (64%) reported taking folic acid before conception and 10,157 (93%) reported taking folic acid during the first trimester of pregnancy. Younger (OR=0.38, 95% CI=0.29-0.50), lower income (OR=0.59, 95% CI=0.51-0.68), lower educated (OR=0.77, 95% CI=0.66-0.89), and single mothers (OR=0.46, 95% CI=0.40-0.52) were less likely to have taken folic acid pre-conception. A similar pattern was found post-conception with younger (OR=0.58, 95% CI=0.40-0.84), lower income (OR=0.40, 95% CI=0.30-0.53), lower educated (OR=0.50, 95% CI=0.38-0.66), and single mothers (OR=0.74, 95% CI=0.60-0.91) less likely to have taken folic acid post-conception. The findings highlight an ongoing need for targeted promotional campaigns to increase supplementation rates among younger and socially disadvantaged mothers.

This study uses a nationally representative sample of 9-month-old infants and their families from the Growing Up in Ireland (GUI) study to investigate if reading to infants is associated with higher scores on contemporaneous indicators of cognitive development independently of other language-based interactions between parent and infant, such as showing them pictures or talking to them. Reading to infants had an independent positive effect on scores for both the problem-solving and communication subscales of the Ages and Stages Questionnaire (ASQ), while the positive effect of showing pictures was independent only for communication scores. The effects of both of these activities were, however, less substantial than the positive effect observed for the more informal activity of frequently talking to the infant while doing other things; and this was observed for both communication and problem-solving. The analyses were robust to adjustment for several other factors including maternal education, gestational age, non-parental care, breastfeeding, attachment and presence of siblings. The findings highlight the potential of reading and talking to infants, not just for language and literacy development but also for other aspects of cognitive development.

This study uses Growing Up in Ireland data to examine how 9,000 children adjusted to primary school. It finds that the vast majority of five year olds are positive about school, look forward to going to school and say good things about school. The study showed that children start school with different skills and capacities and some children face greater challenges. The study suggests a number of ways to help all children experience a positive transition to primary school.

This study uses high-quality longitudinal data from the Growing Up in Ireland study to examine the interplay between home learning environment (HLE) and early childhood education (ECE) in explaining children’s skills development from 9 months to 5 years old across parental socioeconomic status (SES). Random-effects linear regression models show that: (1) supportive HLE improves children’s cognitive and socioemotional skills and ECE quality critically fosters early socioemotional skills; (2) SES is associated with higher early cognitive and socioemotional outcomes, while responsive and consistent parenting behaviours among low-SES parents is particularly critical to improve their children’s socioemotional well-being; (3) high-quality ECE attendance compensates for children’s behavioural problems in less responsive parenting environments, especially among low-SES families, whereas home literacy stimulation is necessary condition for high-quality ECE attendance to benefit children’s early cognitive skills. Overall, HLE and ECE mutually interact in explaining differences in children’s early skills development across SES groups.

To date, studies using cross-sectional methodologies make up a majority of the literature surrounding children with autism spectrum disorders and participation in physical activity and screen time. Longitudinal studies are needed to examine how physical activity and screen time behaviors co-develop for children with and without an autism spectrum disorder. To address this research gap, this study compared how physical activity and screen time levels changed over time (9 to 18 years of age) between youth with autism spectrum disorder and youth with neurotypical development. Data on the levels of moderate-to-vigorous physical activity, light physical activity, television-, and video game-based screen time, collected as a part of the “Growing up in Ireland” study, were compared between youth with autism spectrum disorder and a propensity-matched sample of youth with neurotypical development (n = 88 per group; 176 in total). Robust regression analyses indicated that children with autism spectrum disorder became less active over time compared to children with neurotypical development and that video game screen time also differed significantly between the groups when children were 9 years old. These findings elucidate important disparities present between these groups of children during pivotal developmental times.

To describe response rates and characteristics associated with response to the Pregnancy Risk Assessment Monitoring System study in Ireland (PRAMS Ireland). Using hospital discharge records of live births at a large, urban, obstetric hospital, a sampling frame of approximately 2,400 mother-infant pairs were used to alternately sample 1,200 women. Mothers’ information including name, address, parity, age and infant characteristics such as sex and gestational age at delivery were extracted from records. Modes of contact included an invitation letter with option to opt out of the study, three mail surveys, a reminder letter and text message reminder for remaining non-respondents. Sixty-one per cent of women responded to the PRAMS Ireland survey over a 133 day response period. Women aged <30, single women, multiparous women and women with a preterm delivery were less likely to respond. Women participating in PRAMS Ireland were similar to the national birth profile in 2011 which had a mean age of 32, were 40 % primiparous, 33 % single or never married and had a 28 % caesarean section rate. Survey and protocol changes are required to increase response rates above recommended Centers for Disease Control and Prevention (CDC) thresholds of 65 % within the recommended 90 day data collection cycle. Additional efforts such as stratification and over-sampling are required to increase representativeness among hard to reach groups such as younger, single and multiparous women before expanding the project to an ongoing, national surveillance system in Ireland.

Using data from Ireland’s national longitudinal study of children, this paper employs a capabilities approach to disability to understand how individual characteristics as well as home and school environmental factors at age 9 relate to academic and socio-emotional outcomes of students with special educational needs (SEN) at age 17. Results suggest that young people with SEN register both lower average scores and make less academic progress between the age of 9 and their national lower secondary examination, with the exception of young people with a physical SEN. Both home and school environmental factors at 9 years have long-term associations with the academic outcomes of young people with SEN, after controlling for individual characteristics and prior academic achievement. Home and school environmental factors had less consistent associations with the socio-emotional outcomes of young people with SEN. By using rigorous nationally representative longitudinal data, this paper offers a more holistic understanding of the development of young people with SEN. The paper also provides important evidence that a more inclusive approach for supporting students with additional needs, their parents, and their schools is needed.

Keywords
Special educational needs, capabilities approach, academic achievement, socio-emotional outcomes, Growing Up in Ireland