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Collecting accurate and detailed dietary intake data is costly at a national level. Accordingly, limited dietary assessment tools such as Short Food Questionnaires (SFQs) are increasingly used in large surveys. This paper describes a novel method linking matched datasets to improve the quality of dietary data collected. Growing Up in Ireland (GUI) is a nationally representative longitudinal study of infants in the Republic of Ireland which used a SFQ (with no portion sizes) to assess the intake of “healthy” and “unhealthy” food and drink by 3 years old preschool children. The National Preschool Nutrition Survey (NPNS) provides the most accurate estimates available for dietary intake of young children in Ireland using a detailed 4 days weighed food diary. A mapping algorithm was applied using food name, cooking method, and food description to fill all GUI food groups with information from the NPNS food datafile which included the target variables, frequency, and amount. The augmented data were analyzed to examine all food groups described in NPNS and GUI and what proportion of foods were covered, non-covered, or partially-covered by GUI food groups, as a percentage of the total number of consumptions. The term non-covered indicated a specific food consumption that could not be mapped using a GUI food group. “High sugar” food items that were non-covered included ready-to-eat breakfast cereals, fruit juice, sugars, syrups, preserves and sweeteners, and ice-cream. The average proportion of consumption frequency and amount of foods not covered by GUI was 44 and 34%, respectively. Through mapping food codes in this manner, it was possible, using density plots, to visualize the relative performance of the brief dietary instrument (SFQ) compared to the more detailed food diary (FD). The SFQ did not capture a substantial portion of habitual foods consumed by 3-year olds in Ireland. Researchers interested in focussing on specific foods, could use this approach to assess the proportion of foods covered, non-covered, or partially-covered by reference to the mapped food database. These results can be used to improve SFQs for future studies and improve the capacity to identify diet-disease relationships.

Purposes
Dietary free sugars (FS) are the most important risk factor for dental caries and can contribute to excess energy intake. Measuring FS intake is limited by food composition databases and appropriate dietary assessment methods. The aim of this analysis was to estimate total sugar (TS) and FS intakes for Irish pre-schoolers and examine the proportion of dietary TS and FS captured using a short food questionnaire (SFQ).

Methods
This is a secondary analysis of 3-year-old children from two national surveys; Growing Up in Ireland (GUI), N = 9793 of whom 49% were girls and the National Preschool Nutrition Survey (NPNS), N = 126 and 52% were girls. GUI used SFQs and NPNS used semi-weighed food diaries to collect dietary data from 3-year-old children. Dietary intake databases were linked using an established approach. Mean daily TS and FS intakes and frequency were calculated, and consumption patterns from foods and meals are presented. The proportion of foods that were covered or non-covered by the GUI SFQ was calculated by comparison with the NPNS food diary.

Results
75% of 3 year-olds had FS intake greater than the maximum recommended by WHO guidelines for free sugar intake, while 4% met the lower threshold. The median frequency of TS and FS consumption was 5.0 (4.0–6.0) and 4.0 (3.0–5.0) times/day. Less than one-quarter of TS intake (g/day) was non-covered by the GUI SFQ while less than one-third of FS intake was non-covered.

Conclusions
A large majority of 3-year-old Irish children do not meet the WHO recommended guidelines for FS intake and almost none meet the desired conditional recommendation. SFQs only capture two-thirds of FS intake at this early age.

This paper, for the first time, presents estimates of the causal impact of overweight and obesity on self-rated health (SRH) using instrumental variables (IV) econometric methods. While a number of previous studies have sought to better understand the determinants of SRH, there is no consensus in relation to the impact of overweight and obesity. Using data from a large nationally representative sample of Irish parents and their children, we estimate a range of ordered probit models to isolate the causal effect of overweight and obesity on SRH. Our data includes independently and objectively recorded weight and height measures for parents and their children and we instrument for parental body mass index (BMI) status using the BMI of a biological child. After controlling for a range of individual, socioeconomic, health and lifestyle related variables, we find that being overweight has a negligible impact on SRH, while being obese has a practically and statistically significant negative impact on SRH, with these effects most pronounced for those who are most obese. We find only minor differences in these effects across gender.

This chapter presents a socioeconomic profile of childhood disability in an Irish context. Using data from the Growing Up in Ireland (GUI) survey, it considers a range of dimensions. These include an analysis of the associations between the childhood disability status of a household and a range of socioeconomic indicators relating to labour market outcomes, levels of parental education, social class, income and economic hardship. The chapter compares households with and without a child with a disability on the basis of these socioeconomic measures. The primary carer of a child with a disability is considerably less likely to participate in the labour market and considerably more likely to turn down work opportunities, when compared to a primary carer of a child without a disability. Parents of a child with a disability are less likely to be educated at third level and more likely to be in the lowest social class.

Purpose
This study examines the expressive language and speech of twins, relative to singletons, at 3 and 5 years, with the aim of determining if a twinning effect occurs during this developmental period. The possibility of twins outgrowing a twinning effect was investigated.

Method
A weighted population-based sample of 185 twins and 1,309 closely spaced singletons who participated in the Growing Up in Ireland study was analyzed. Their development was compared using a standardized expressive vocabulary assessment and parent interview at 3 and 5 years as well as teacher reports at 5 years. Causal steps mediation analyses were subsequently conducted to determine if gestation and birth weight mediated twin–singleton differences in expressive vocabulary development.

Results
Twins’ expressive vocabulary scores were slightly lower than those of singletons at 3 years, but there was no significant difference at 5 years. More parents of twins reported “a little” concern about their child’s expressive language and speech skills at 3 years, although there was no significant twin–singleton difference 2 years later. Teachers’ ratings of twins’ and singletons’ expressive language and speech skills at 5 years were comparable. Shorter gestations and lower birth weights mediated twins’ lower expressive vocabulary scores at 3 years.

Conclusions
A very small twinning effect on expressive vocabulary development exists at 3 years and is outgrown by 5 years. Twins born after shorter gestations or at a lower birth weight are at an increased risk of having less developed expressive vocabulary skills at 3 years.

In the current study, we investigated the developmental dynamics between positive youth development, being bullied in adolescence, gender, and sociocultural risk factors. Participants were 3,509 males (49%) and 3,656 females (51%) studied longitudinally across the ages of 9, 13, and 17 years in the Growing Up in Ireland study. Using structural equation modeling, we discovered that being bullied in early adolescence was most strongly predicted by having fewer close friends, higher family poverty, and living in neighborhoods with higher levels of disorder. However, the social disadvantage of a young person’s school did not impact being bullied. More positive reports of connection and caring in early adolescence were negatively predicted by neighborhood disorder and family poverty, and being female had positive association with relationships with teachers. Developing confidence, competence, and character in late adolescence was notably related to having fewer experiences of family trauma and transitions in childhood and to having higher levels of rapport with parents in early adolescence. The results highlight the importance of studying relationships and psychological development in sociocultural context.

The current study investigates how internalizing and externalizing problems develop reciprocally across infancy to middle childhood, in relation to children’s gender, cognitive functioning, socioeconomic status, and parental stress. The study also examines the impact of the developmental cascade of internalizing and externalizing problems on bullying and victimization in middle childhood. The total sample comprised 11,134 participants studied across 9-months, 3-years, 5-years, 7/8-years and 9-years of age, from the Infant Cohort of the Growing Up in Ireland study (50.6% male). Using structural equation modeling, we discovered that externalizing problems predicted internalizing problems across time for both genders. However, internalizing problems predicted externalizing problems consistently across time for girls and not for boys. Furthermore, girls’ internalizing and externalizing problems were much more strongly predicted by socioeconomic status than boys’ problems were, suggesting a greater sensitivity to context for girls. Bullying in middle childhood was predicted by cognitive ability for both genders, and by externalizing problems for boys. In comparison, victimization was predicted by externalizing and internalizing problems for both genders. Theoretical and practical implications are discussed.

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.

This report explores factors influencing attitudes to, and the use of, the Irish language on the island of Ireland. In so doing, the report draws, first and foremost, on 2013 Irish Language Survey. In order to explore changes in attitudes over time, the study also draws on earlier (2001) survey data. Further insights into overall trends will be provided by the analysis of Census data. Given that attitudes are often shaped by schooling, the study also draws on the Growing Up in Ireland study (9-year-cohort) as well as the Irish Post Primary Longitudinal Study (PPLS) which indicate student perspectives on Irish.

Purpose
The purpose of this paper is to explore the factors associated with occupational stress and job satisfaction among Irish primary school principals. A principal’s job has become increasingly demanding and complex in recent decades. However, there is little current research into their levels of stress and job satisfaction, particularly based on nationally representative data. In order to understand how principals perceive their job and how best to support them, new insights into factors contributing to job satisfaction and stress of school principals are warranted.

Design/methodology/approach
The paper draws on an analysis of Growing up in Ireland data, a national representative study of nine-year-old children in Ireland. In order to explore the simultaneous impact of individual and school factors on stress and job satisfaction of principals in Irish primary schools, multivariate analysis was used. Analyses in this paper are based on responses from principals in 898 schools.

Findings
The results of the study indicate that a significant number of primary school principals in Ireland are not very satisfied and feel stressed about their job. Regression analysis revealed that job satisfaction and occupational stress were related to a complex set of personal characteristics, working conditions, school context and teacher climate.

Research limitations/implications
The data are limited to primary school principals. However, this is in itself an advantage since it allows for greater insights into variation across principals in job satisfaction and stress, holding the effect of school level constant.

Originality/value
This is the first study of its kind in the Irish context that explores the simultaneous effect of a number of factors on school principals’ stress and job satisfaction.

Keywords
Job Satisfaction, Ireland, Occupational stress, Primary schools