Longitudinal Study Of Australian Children Research Articles

Menstrual pain in Australian adolescent girls and its impact on regular activities: a population-based cohort analysis based on Longitudinal Study of Australian Children survey data.

To determine the proportion of Australian adolescent girls who experience menstrual pain (dysmenorrhea); to assess associations of dysmenorrhea and period pain severity with adolescents missing regular activities because of their periods. Prospective, population-based cohort study; analysis of Longitudinal Study of Australian Children (LSAC) survey data. Female adolescents in the nationally representative cross-sequential sample of Australian children recruited in 2004 for the Kinder cohort (aged 4-5 years at enrolment). Survey data from waves 6 (mean age 14 years), wave 7 (16 years) and wave 8 (18 years) were analysed. Severity of period pain during the preceding three months (very, quite, a little, or not at all painful); number of activity types missed because of periods; relationship between missing activities and period pain severity. Of the 1835 participating female members of the LSAC Kinder cohort at waves 6 to 8, 1600 (87%) responded to questions about menstruation during at least one of waves 6 to 8 of data collection. At wave 6 (14 years), 227 of 644 respondents (35%) reported dysmenorrhea, 675 of 1341 (50%) at wave 6 (16 years), and 518 of 1115 (46%) at wave 8 (18 years). Of the 366 participants who reported period pain severity at all three waves, 137 reported no dysmenorrhea at all three waves (37%), 66 reported dysmenorrhea at all three waves (18%), 89 reported increasing period pain over time (24%), and 38 reported declining pain (10%). At wave 6, 223 of 647 participants reported missing at least one activity because of their periods (34%), 454 of 1341 at wave 7 (34%), and 344 of 1111 at wave 8 (31%). Of the participants who experienced very painful periods, 72% (wave 6), 63% (wave 7), and 65% (wave 8) missed at least one activity type because of their periods, as did 45% (wave 6), 36% (wave 7), and 40% (wave 8) of those who experienced quite painful periods. A large proportion of adolescent girls in Australia experience period pain that affects their engagement in regular activities, including school attendance. Recognising adolescent period pain is important not only for enhancing their immediate quality of life with appropriate support and interventions, but also as part of early screening for chronic health conditions such as endometriosis.

The effect and timing sensitivity of parenting style on cognitive and non‐cognitive skills

AbstractI exploit data from the Longitudinal Study of Australian Children and linked administrative data to study the effect of various parenting styles on a child's academic achievement and development of non‐cognitive skills at age 14. My results suggest the authoritative parenting style, characterised as disciplined but warm parenting, to be optimal for test scores, prosocial behaviour, and ability to focus. For test scores, I find a greater effect if this parenting style was applied 4 years prior rather than more recently. Conversely for non‐cognitive skills, I find a greater effect from contemporaneous parenting. The implication of my results is to encourage authoritative parenting from an early age but also highlight its continued importance in the present.

How much do adverse childhood experiences contribute to adolescent anxiety and depression symptoms? Evidence from the longitudinal study of Australian children.

This study aims to: (i) examine the association between adverse childhood experiences (ACEs) and elevated anxiety and depressive symptoms in adolescents; and (ii) estimate the burden of anxiety and depressive symptoms attributable to ACEs.Data were analyzed from 3089 children followed between Waves 1 (age 4-5 years) and 7 (16-17 years) of the Longitudinal Study of Australian Children. Logistic regression was used to estimate the associations between ACEs and child-reported elevated anxiety and depressive symptoms at age 16-17. Anxiety and depressive symptoms were measured using the Children's Anxiety Scale and Short Mood and Feelings Questionnaire, respectively. The punaf command available in STATA 14 was used to calculate the population attributable fraction (PAF).Before the age of 18 years, 68.8% of the children had experienced two or more ACEs. In the analysis adjusted for confounding factors, including co-occurring ACEs, both history and current exposure to bullying victimisation and parental psychological distress were associated with a statistically significant increased likelihood of elevated anxiety and depressive symptoms at age 16-17. Overall, 47% of anxiety symptoms (95% CI for PAF: 35-56) and 21% of depressive symptoms (95% CI: 12-29) were attributable to a history of bullying victimisation. Similarly, 17% (95% CI: 11-25%) of anxiety and 15% (95% CI: 4-25%) of depressive symptoms at age 16-17 years were attributable to parental psychological distress experienced between the ages of 4-15 years.The findings demonstrate that intervention to reduce ACEs, especially parental psychological distress and bullying victimisation, may reduce the substantial burden of mental disorders in the population.

The association between academic achievement goals and adolescent depressive symptoms: a prospective cohort study in Australia

Students define academic competence across two axes: developing skills and understanding (mastery) versus comparisons with peers (performance), and achieving goals (approach) versus avoiding failure (avoidance). We aimed to examine the longitudinal association between achievement goals and adolescent depressive symptoms. We analysed data from the Kindergarten (recruited at age 4-5 years; born between March, 1999, and February, 2000; recruited from March, 2004 to November, 2004) and Baby (recruited at age 0-1 years; born between March, 2003, and February, 2004; recruited from March, 2004 to January, 2005) cohorts of the Longitudinal Study of Australian Children. Participants were identified through the Medicare enrolment database and sampled using a randomised selection stratified by postcode to represent the Australian population. Achievement goals were measured at age 12-13 years with the Achievement Goal Questionnaire (ranges from 1 to 7 on each of the four subscales), and depressive symptoms with the Short Mood and Feelings Questionnaire (score ranges from 0 to 26, with higher scores indicating more severe symptoms) at ages 14-15 years (both cohorts) and 16-17 years (Kindergarten cohort only). Analyses were linear multilevel and traditional regressions, with confounder adjustment, for participants with available data on the exposures, confounders, and outcome. We included 3200 participants (1585 female and 1615 male) from the Kindergarten cohort and 2671 participants (1310 female and 1361 male) from the Baby cohort. A 1-point increase in mastery-approach goals was associated with decreased depressive symptom severity score (Kindergarten, -0·33 [95% CI -0·52 to -0·15]; Baby, -0·29 [-0·54 to -0·03]), while a 1-point increase in mastery-avoidance goals was associated with increased depressive symptom severity score (Kindergarten, 0·35 [95% CI 0·21 to 0·48]; Baby, 0·44 [0·25 to 0·64]). A 1-point increase in performance-avoidance goals was associated with increased depressive symptom severity score in the Kindergarten cohort but not the Baby cohort (Kindergarten, 0·26 [95% CI 0·11 to 0·41]; Baby, -0·04 [-0·27 to 0·19]). We found little evidence of an association between depressive symptom severity and performance-approach goals. Depressive symptoms in adolescents were associated with their achievement goals, which could be targetable risk factors for future trials to investigate whether school-based interventions that aim to enhance factors consistent with mastery goals (ie, learning skills and understanding the subject, rather than assessing competence in comparison to peers) could prevent depression in adolescents. Sir Henry Dale Fellowship jointly funded by the Wellcome Trust and the Royal Society.

Before-school physical activity levels and sociodemographic correlates among Australian adolescents: A cross-sectional study

ABSTRACT Understanding adolescents’ physical activity levels and underpinning contextual factors is crucial for health promotion. This cross-sectional study, using 24-hour time use diaries and sociodemographic variables from the Longitudinal Study of Australian Children, addressed gaps in understanding of physical activity in the before-school segment (the time between waking up and commencing classes). The study examined a) adolescents’ time spent in before-school physical activity, focusing on location and shared presence, and b) sociodemographic correlates of before-school physical activity. Completed diaries by 12–13 year-olds (n = 3,201) revealed that adolescents reported an average of 10.8 minutes of daily before-school physical activity (average segment length: 114 min), mostly classified as active transport (5.7 min). Most before-school physical activity occurred in a location other than home or school (6.1 min) and with peers (6.1 min). Notably, 51% of boys and 60% of girls did not report any before-school physical activity. Through two-part regression, we found that boys, adolescents from single-parent households, and those with longer before-school segments are more likely to report before-school physical activity compared to their counterparts. Before-school initiatives should promote active transport and diverse opportunities in other settings. Research into barriers and facilitators may inform more inclusive and effective promotion strategies, including school-based initiatives.

Impact of prenatal maternal dietary exclusion on childhood obesity and overweight risk.

Child birthweight is a measure of fetal nutrition that is primarily determined by prenatal maternal (PM) diet. Child birthweight and child obesity/overweight risk are well established to be linked. Nevertheless, no studies have investigated the impact of PM dietary exclusion on child obesity/overweight risk or body mass index z-score (BMIz). The study aimed to determine whether PM dietary exclusion affected the child's BMIz, obesity/overweight risk, whether child birthweight serves as a mediator of this, and whether PM use of dietary supplements can protect against this. Waves within the years 2004-2019 from the Longitudinal Study of Australian Children, a population-based cohort study, were analyzed. The participants were aged 0 to 15 years during these waves of the study. Analysis was conducted using logistic and linear models. A total of 5,107 participants were involved in the first wave of the study. The PM exclusion of fish was associated with a higher risk of being underweight at age 14 or 15 years and mild-to-moderate obesity at age 6 or 7 years. The PM exclusion of egg was associated with a higher risk of being overweight at age 14 or 15 years. The exclusion of dairy was associated with more mixed effects. Mediation effects did not reach statistical significance. Moderation effects involving PM dietary supplement use, when they did occur, were associated with higher child BMIz and usually a higher risk of obesity/overweight. Fish and eggs are likely important parts of PM diets for preventing childhood obesity and overweight. Further studies will be needed to determine reasons for this and the apparent adverse effects of dietary supplements on overweight/obesity risk.

Socioeconomic inequalities in child and adolescent mental health in Australia: the role of parenting style and parents' relationships.

Socioeconomic inequalities in health and their determinants have been studied extensively over the past few decades. However, the role of parenting style and parents' couple relationships in explaining mental health inequalities is limited. Therefore, this study aims to investigate the distributional impact of parenting style (angry parenting, consistent parenting, and inductive parenting) and parents' couple relationships (e.g., argumentative, happy relationships) on socioeconomic inequalities and by extension on mental health status of Australian children and adolescents. This study utilized data from the Longitudinal Study of Australian Children (Waves 1-7), specifically focusing on intact biological parent families, while excluding single-parent and blended-family households. We applied the decomposition index and the Blinder Oaxaca method to investigate the extent of the contribution and temporal impact of parenting style and parents' couple relationships on the mental health status of Australian children and adolescents. This study revealed that poor parenting style is the single most important factor that leads to developing mental health difficulties in children and adolescents, especially from low socioeconomic status, and it contributes almost 52% to socioeconomic inequalities in mental health status. Conversely, household income, maternal education, employment status, and parents' couple relationships contributed 28.04%, 10.67%, 9.28%, and 3.34%, respectively, to mental health inequalities in children and adolescents. Overall, this study underscores the importance of parenting style and parents' couple relationships as significant predictors of mental health outcomes in children and adolescents. These results highlight the need for targeted interventions to support families from low socioeconomic backgrounds to address the significant mental health inequalities observed in the study population.

Differences in weight status among Australian children and adolescents from priority populations: a longitudinal study.

Australia has a high level of cultural and linguistic diversity, including Aboriginal and Torres Strait Islander peoples. Children from specific cultural and ethnic groups may be at greater risk of overweight and obesity and may bear the additional risk of socioeconomic disadvantage. Our aim was to identify differences in body-mass index z-score (zBMI) by: (1) Cultural and ethnic groups and; (2) Socioeconomic position (SEP), during childhood and adolescence. We used data from the Longitudinal Study of Australian children (n = 9417) aged 2-19 years with 50870 longitudinal measurements of zBMI. Children were classified into 9 cultural and ethnic groups, based on parent and child's country of birth and language spoken at home. These were: (1) English-speaking countries; (2) Middle East & North Africa; (3) East & South-East Asia; (4) South & Central Asia; (5) Europe; (6) Sub-Saharan Africa; (7) Americas; (8) Oceania. A further group (9) was defined as Aboriginal and Torres Strait Islander from self-reported demographic information. Longitudinal cohort analyses in which exposures were cultural and ethnic group and family socioeconomic position, and the outcome was zBMI estimated using multilevel mixed linear regression models. We stratified our analyses over three periods of child development: early childhood (2-5 years); middle childhood (6-11 years); and adolescence (12-19 years). Across all three periods of child development, children from the Middle East and North Africa, the Americas and Oceania were associated with higher zBMI and children from the two Asian groups were associated with lower zBMI, when compared to the referent group (English). zBMI was socioeconomically patterned, with increasingly higher zBMI associated with more socioeconomic disadvantage. Our findings identified key population groups at higher risk of overweight and obesity in childhood and adolescence. Prevention efforts should prioritize these groups to avoid exacerbating inequalities in healthy weight in childhood.

The links between parental smoking and childhood obesity: data of the longitudinal study of Australian children

Childhood obesity is one of the most concerning public health issues globally and its implications on mortality and morbidity in adulthood are increasingly important. This study uses a unique dataset of Australian children aged 4–16 to examine the impact of parental smoking on childhood obesity. It confirms a significant link between parental smoking (stronger for mothers) and higher obesity risk in children, regardless of income, age, family size, or birth order. Importantly, we explore whether heightened preference for unhealthy foods can mediate the effect of parental smoking. Our findings suggest that increased consumption of unhealthy foods among children can be associated with parental smoking.

Economic costs associated with unhealthy weight control behaviors among Australian adolescents.

This study explored the relationship between unhealthy weight control behaviors (UWCBs) and their associated economic costs among adolescents using the 2014-2018 Longitudinal Study of Australian Children (LSAC). LSAC data in Wave 6 (n = 3538 adolescents aged 14-15 years), Wave 7 n = 3089 adolescents aged 16-17 years), and Wave 8 (n = 3037 adolescents aged 18-19 years) were derived from a representative sample of Australian adolescents. UWCBs were measured using the self-reported Branched Eating Disorder Test questionnaire. UWCBs were sub-classified into having fasting behaviors, using weight loss supplements or purging behaviors. Economic costs include healthcare and productivity costs to caregivers. Healthcare costs were measured using data from the Medicare and Pharmaceutical Benefits, which includes both medical and pharmaceutical costs. Productivity losses were measured using caregivers' lost leisure time due to UWCBs among adolescents. The mixed effect model identified statistically significant higher economic costs (mean difference = $453, 95% CIs $154, $752), higher health care costs (mean difference = $399, 95% CIs $102, $695), and higher productivity costs (mean difference = $59, 95% CIs $29, $90) for adolescents with UWCBs compared to their peers with no UWCBs. Subgroup analysis revealed that higher costs were associated with fasting and purging behaviors. UWCBs were associated with increased economic costs during adolescence. Our finding suggests there should be a policy focus on tackling UWCBs to reduce the economic burden on the healthcare system and society. The study contributes to existing knowledge by investigating the direct healthcare costs and productivity losses associated with unhealthy weight control behaviors in Australian adolescents (14-18 years old) using a dataset that follows Australian adolescents over time. We found that engaging in unhealthy weight control behaviors such as fasting, using weight loss supplements, and purging was linked to higher costs among adolescents, suggesting policies should focus on addressing these behaviors.

Household income supplements in early childhood to reduce inequities in children's development

BackgroundEarly childhood interventions have the potential to reduce children's developmental inequities. We aimed to estimate the extent to which household income supplements for lower-income families in early childhood could close the gap in children's developmental outcomes and parental mental health. MethodsData were drawn from a nationally representative birth cohort, the Longitudinal Study of Australian Children (N = 5107), which commenced in 2004 and conducted follow-ups every two years. Exposure was annual household income (0–1 year). Outcomes were children's developmental outcomes, specifically social-emotional, physical functioning, and learning (bottom 15% versus top 85%) at 4–5 years, and an intermediate outcome, parental mental health (poor versus good) at 2–3 years. We modelled hypothetical interventions that provided a fixed-income supplement to lower-income families with a child aged 0–1 year. Considering varying eligibility scenarios and amounts motivated by actual policies in the Australian context, we estimated the risk of poor outcomes for eligible families under no intervention and the hypothetical intervention using marginal structural models. The reduction in risk under intervention relative to no intervention was estimated. ResultsA single hypothetical supplement of AU$26,000 (equivalent to ∼USD$17,350) provided to lower-income families (below AU$56,137 (∼USD$37,915) per annum) in a child's first year of life demonstrated an absolute reduction of 2.7%, 1.9% and 2.6% in the risk of poor social-emotional, physical functioning and learning outcomes in children, respectively (equivalent to relative reductions of 12%, 10% and 11%, respectively). The absolute reduction in risk of poor mental health in eligible parents was 1.0%, equivalent to a relative reduction of 7%. Benefits were similar across other income thresholds used to assess eligibility (range, AU$73,329-$99,864). ConclusionsHousehold income supplements provided to lower-income families may benefit children's development and parental mental health. This intervention should be considered within a social-ecological approach by stacking complementary interventions to eliminate developmental inequities.

Task persistence as a competency capable of reducing delinquency in early to mid-adolescence

In an effort to understand the segment of the juvenile population that seemingly ceases engaging in delinquency during adolescence, the relationship between a performance competency (task persistence) and offending was explored in 3,928 youth (2,005 boys and 1,923 girls) from the Longitudinal Study of Australian Children. Three waves of data, with adjacent time periods separated by two years, were used to test the hypothesis that a change in task persistence would correlate with a change in future delinquency. Given that the two dependent variables in this study (delinquency at Time 2 and delinquency at Time 3) followed a negative binomial distribution, negative binomial regression and binomial logistic regression analyses were performed. Results from both analyses confirmed the hypothesis that a rise in task persistence from Time 1 to Time 2 would predict a decrease in delinquency from Time 1 to Time 2 to Time 3 and that a static measure of task persistence at Time 1 would predict a change in delinquency from Time 1 to Time 2. These results suggest that task persistence may be a competency capable of suppressing delinquency during a developmental period in which delinquency ordinarily rises.

Trajectories of psychosocial environmental factors and their associations with asthma symptom trajectories among children in Australia.

Several psychosocial factors, such as maternal mental health and parents' financial hardship, are associated with asthma symptoms among children. So, we aim to investigate the changing patterns of important psychosocial environmental factors and their associations with asthma symptom trajectories among children in Australia. We considered asthma symptoms as wheezing (outcome) and psychosocial environmental factors (exposures) from 0/1 year to 14/15 years of the participants from the "Longitudinal Study of Australian Children (LSAC)" for this study. We used group-based trajectory modeling to identify the trajectory groups for both exposure and outcome variables. Associations between psychosocial factors and three distinct asthma symptom trajectories were assessed by multivariable logistic regression. We included 3917 children from the LSAC birth cohort in our study. We identified distinct trajectories for maternal depression, parents' financial hardship, parents' stressful life events and parents' availability to their children from birth to 14/15 years of age. Compared to the "low/no" asthma symptom trajectory group, children exposed to a "moderate & increasing" maternal depression, "moderate & declining" parents' financial hardship, and "moderate & increasing" parents' stressful life events were significantly associated (relative risk ratio [RRR]: 1.55, 95% confidence interval [CI]: 1.27, 1.91; RRR: 1.40, 95%; CI: 1.15, 1.70; RRR: 1.77, 95%; CI: 1.45, 2.16) with "persistent high" asthma symptom trajectory. Several psychosocial factors that are potential stressors for mental health increase the risk of having an adverse asthma symptom trajectory during childhood. Further attention should be given to reducing exposure to maternal depression, parents' financial hardship, and parents' stressful live events for long-term asthma control in children.

Geographic patterns of dental service use in the Child Dental Benefits Schedule: 6 years of claims in the Longitudinal Study of Australian Children.

This article explores the geographic patterns of claims within the Australian Government's Child Dental Benefits Schedule (CDBS). The CDBS is a means-tested schedule implemented in 2014 to improve access to dental services for children. Under the schedule, eligible children receive funding to subsidise dental services. This study used data from the Longitudinal Study of Australian Children and linked data from the Medicare universal healthcare system, to examine dental service use amongst a subset of children aged 10 and 14 years. Dental service items were classified using Two-step Cluster Analysis, and appointments were analysed using multinomial logistic regression. Geographic characteristics were included as predictor variables. The study found that the majority of dental appointments were non-operative (70.7%, n = 5808), with diagnostic, radiographic, and preventive items being the most common. There were slightly higher proportions of operative appointments (fillings and extractions) compared with non-operative appointments in remote and very remote areas, low socio-economic areas, and Queensland and Northern Territory. Cluster analysis identified eight groups of non-operative appointments and four groups of operative appointments. New South Wales had a higher proportion of 'prophylactic IV' appointments than any other State and Territory, which included debridement and topical fluoride services. Cluster analysis identified distinct groups of non-operative and operative appointments, each with unique characteristics. The distribution of appointments varied by State/Territory and region. Further research and interventions are needed to ensure equitable access to services and a shift to preventive care for disadvantaged populations of Australian children. Exploring alternative funding models that support clinically relevant claims, rather than maximising financial benefits such as time-based renumeration models should be explored.

Emotional symptoms and inflammatory biomarkers in childhood: Associations in two Australian birth cohorts

BackgroundAn increasing body of evidence supports associations between inflammation and mental health difficulties, but the onset and directionality of these relationships are unclear. MethodsData sources: Barwon Infant Study (BIS; n = 500 4-year-olds) and Longitudinal Study of Australian Children (LSAC; n = 1099 10–13-year-olds). Measures: Strengths and Difficulties Questionnaire emotional symptoms at 4, 10–11 and 12–13 years, and circulating levels of two inflammatory biomarkers, high-sensitivity C-reactive protein (hsCRP) and glycoprotein acetyls (GlycA), at 4 and 11–12 years. Analysis: Adjusted quantile regression models examining cross-sectional associations between emotional symptoms and inflammation in 4-year-olds (BIS), and cross-lagged associations in 10–13-year-olds (LSAC). ResultsWe identified a small association between higher emotional symptoms at 10–11 years and higher GlycA levels a year later (standardised coefficient β = 0.09; 95%CI: 0.02 to 0.15). Sex-stratified analyses revealed this association was stronger for boys (β = 0.13; 95%CI: 0.04 to 0.21) than girls (β = 0.01; 95%CI: −0.09 to 0.11). These associations were not observed for hsCRP. There was little evidence of an association between higher GlycA or hsCRP at 11–12 years and emotional symptoms a year later, or cross-sectional associations between emotional symptoms and hsCRP or GlycA at 4 years. LimitationsA single time-point of biomarker collection in late childhood precluded adjustment for baseline inflammatory biomarkers. ConclusionsOur results support the direction of association from emotional symptoms to inflammation in late childhood, with potential sex differences. This adds to the body of evidence that addressing emotional symptoms in childhood is a major priority in optimising overall health throughout the life course.

The mental health impact of school bullying among young carers in Australia: a causal mediation analysis

Informal care can exert adverse effects on the mental health of young people. Bullying victimisation is an important determinant of mental disorders. Young carers are at elevated risk of bullying. We quantify the mental health effects of informal care among Australian adolescents and the extent to which these effects are transmitted through school bullying. We used data from the Longitudinal Study of Australian Children. Participants were classified as non-carers, light carers (caring for < 10 h/week) and moderate-to-heavy carers (caring for 10 + h/week). Mental health was measured using the Kessler Psychological Distress Scale (K10). Using a counterfactual approach to mediation analysis, total effects (TE) of informal care on mental health were decomposed into natural direct effects (NDE—mental health effects not transmitted through school bullying) and natural indirect effects (NIE—mental health effects transmitted through school bullying). The TE of informal caring was 0.71 (95%CI − 0.03, 1.49) for light carers and 1.72 (95%CI 0.45, 3.02) for moderate-to-heavy carers. While school bullying explained 27% of the TE among moderate-to-heavy carers (NIE: 0.46; 95%CI 0.12, 0.91) there was weak evidence of mediation for light carers. Our findings indicate that the mental health effects of moderate-to-heavy caregiving can be reduced by school bullying interventions.

Understanding early risk factors for eating disorder symptoms in adolescence: the role of body dissatisfaction, negative emotional reactivity and self-esteem at age 10–11 years

ABSTRACT Objective Risk factors associated with eating disorders (EDs) have been widely studied, although previous research has been limited to largely cross-sectional data or understanding risk factors in adult populations. Little is therefore known about the role of risk factors in early adolescence for the subsequent development of ED symptoms in adolescence. Method The present study examined factors identified in transdiagnostic models of EDs, in a sample of 2,372 adolescents who participated in Waves 3, 4 and 7 of the Longitudinal Study of Australian Children. The present study examined the association between body dissatisfaction, negative emotional reactivity and self-esteem in adolescents aged 10–11, and probable ED status measured via self-report at age 16–17, while adjusting for confounders measured at age 8–9 years. Results Negative reactivity and self-esteem at age 10–11 years were not significantly associated with ED status at age 16–17. Body dissatisfaction was associated with a decreased likelihood of meeting probable ED status at age 16–17, however this effect was small and likely not clinically significant, with only 2% of variance in probable ED status accounted for by body dissatisfaction. Conclusion Findings of the study suggest that transdiagnostic models of EDs may not capture the key risk factors for EDs in early adolescence.

Psychometric Evaluation of the PedsQL GCS and CHU9D in Australian Children and Adolescents with Common Chronic Health Conditions.

Generic instruments such as the Pediatric Quality of Life Inventory™ v4.0 Generic Core Scales (PedsQL GCS) and Child Health Utility 9D (CHU9D) are widely used to assess health-related quality of life (HRQOL) of the general childhood population, but there is a paucity of information about their psychometric properties in children with specific health conditions. This study assessed psychometric properties, including acceptability, reliability, validity, and responsiveness, of the PedsQL GCS and the CHU9D in children and adolescents with a range of common chronic health problems. We used data from the Longitudinal Study of Australian Children (LSAC), for children aged 10-17 years with at least one of the following six parent-reported health conditions: asthma, anxiety/depression, attention deficit hyperactivity disorder (ADHD), autism/Asperger's, epilepsy, and type 1 diabetes mellitus. The LSAC used parent proxy-reported PedsQL GCS and child self-reported CHU9D assessments. The performance of each instrument (PedsQL GCS and CHU9D) for each psychometric property (acceptability, reliability, validity, and responsiveness) was assessed against established criteria. The study sample included 7201 children and adolescents (mean age = 14 years; range 10.1-17.9 years; 49% female) with 15,568 longitudinal observations available for analyses. Across the six health conditions, acceptability of the PedsQL GCS was high, while acceptability for the CHU9D was mixed. Both the PedsQL GCS and CHU9D showed strong internal consistency (Cronbach's alpha range: PedsQL GCS = 0.70-0.95, CHU9D = 0.76-0.84; item-total correlations range: PedsQL GCS = 0.35-0.84, CHU9D = 0.32-0.70). However, convergent validity for both the PedsQL GCS and CHU9D was generally weak (Spearman's correlations ≤ 0.3). Known group validity was strong for the PedsQL GCS (HRQOL differences were detected for children with and without asthma, anxiety/depression, ADHD, autism/Asperger's, and epilepsy). CHU9D was only able to discriminate between children with and without anxiety/depression, ADHD, and autism/Asperger's. The responsiveness of both the PedsQL GCS and CHU9D was variable across the six conditions, and most of the estimated effect sizes were relatively small (<0.5). This study expands the evidence base of psychometric performance of the PedsQL GCS and CHU9D and can aid in appropriate HRQOL instrument selection for the required context by researchers and clinicians.

Mental ill-health and substance use among sexuality diverse adolescents: The critical role of school climate and teacher self-efficacy.

Mental ill-health, substance use and their co-occurrence among sexuality diverse young people during earlier adolescence is relatively understudied. The preventive utility of positive school climate for sexuality diverse adolescents' mental health is also unclear, as well as the role of teachers in conferring this benefit. Using Wave 8 'B Cohort' data from the Longitudinal Study of Australian children (N = 3127, Mage = 14.3), prevalence ratios and odds ratios were used to assess prevalence and disparities in mental ill-health and substance use, and multinomial logistic regression for co-occurring outcomes, among sexuality diverse adolescents relative to heterosexual peers. Logistic regression was used to assess associations between school climate and teacher self-efficacy with sexuality diverse adolescents' mental health. Mental ill-health prevalence ranged from 22% (suicidal thoughts/behaviour) to 46% (probable depressive disorders) and substance use between 66% (cigarette use) and 97% (alcohol use). Sexuality diverse participants were significantly more likely to report self-harm and high levels of emotional symptoms in co-occurrence with cigarette, alcohol and/or cannabis use. For each 1-point increase in school climate scores as measured by the Psychological Sense of School Membership scale, there was 10% reduction in sexuality diverse adolescents reporting high levels of emotional symptoms, probable depressive disorder, self-harm thoughts/behaviour and suicidal thoughts/behaviour. For each 1-point increase in lower perceived (worse) teacher self-efficacy scores as measured by four bespoke teacher self-efficacy items, odds of sexuality diverse adolescent-reported suicidal thoughts/behaviour increased by 80%. Mental ill-health, substance use and especially their co-occurrence, are highly prevalent and pose significant and inequitable health and well-being risks. Schools represent a potential site for focusing future prevention efforts and educating and training teachers on sexuality diversity is a promising pathway towards optimising these.

A longitudinal model of sleep problems and classroom self-regulation across elementary school

This study explored longitudinal and bidirectional associations among behavioral sleep problems and self-regulation difficulties across the elementary school years. Analyses drew data from the Kindergarten Cohort (N = 4983) of the Longitudinal Study of Australian Children (LSAC) across five data waves, when children were aged 4–13 years (49% female, 86% English-speaking). Cross-lagged structural equation models revealed significant bidirectional associations, with greater sleep problems consistently predicting classroom self-regulation two years later, while poorer self-regulation predicted later sleep problems only at certain time points. Greater behavioral sleep problems were associated with poorer post-elementary achievement and social-emotional wellbeing, while stronger classroom self-regulation skills supported more positive outcomes in these constructs. Findings indicate strong developmental associations among sleep problems and dysregulation.