Benchmark dose profiles for bivariate exposures.

While benchmark dose (BMD) methodology is well-established for settings with a single exposure, these methods cannot easily handle multidimensional exposures with nonlinear effects. We propose a framework for BMD analysis to characterize the joint effect of a two-dimensional exposure on a continuous outcome using a generalized additive model while adjusting for potential confounders via propensity scores. This leads to a dose-response surface which can be summarized in two dimensions by a contour plot in which combinations of exposures leading to the same expected effect are identified. In our motivating study of prenatal alcohol exposure, cognitive deficits in children are found to be associated with both the frequency of drinking as well as the amount of alcohol consumed on each drinking day during pregnancy. The general methodological framework is useful for a broad range of settings, including combinations of environmental stressors, such as chemical mixtures, and in explorations of the impact of dose rate rather than simply cumulative exposure on adverse outcomes.

School-based intervention to address self-regulation and executive functioning in children attending primary schools in remote Australian Aboriginal communities.

Executive functioning and self-regulation influence a range of outcomes across the life course including physical and mental health, educational success, and employment. Children prenatally exposed to alcohol or early life trauma (ELT) are at higher risk of impairment of these skills and may require intervention to address self-regulation deficits. Researchers partnered with the local Aboriginal health organization and schools to develop and pilot a manualized version of the Alert Program® in the Fitzroy Valley, north Western Australia, a region with documented high rates of fetal alcohol spectrum disorder and ELT. This self-controlled cluster randomized trial evaluated the effect of an 8-week Alert Program® intervention on children's executive functioning and self-regulation skills. Following parent or caregiver consent (referred to hereafter as parent), 271 students were enrolled in the study. This reflects a 75% participation rate and indicates the strong community support that exists for the study. Teachers from 26 primary school classrooms across eight Fitzroy Valley schools received training to deliver eight, one-hour Alert Program® lessons over eight-weeks to students. Student outcomes were measured by parent and teacher ratings of children's behavioral, emotional, and cognitive regulation. The mean number of lessons attended by children was 4.2. Although no significant improvements to children's executive functioning skills or behavior were detected via the teacher-rated measures as hypothesized, statistically significant improvements were noted on parent-rated measures of executive functioning and behavior. The effectiveness of future self-regulation programs may be enhanced through multimodal delivery through home, school and community based settings to maximize children's exposure to the intervention. Despite mixed findings of effect, this study was an important first step in adapting and evaluating the Alert Program® for use in remote Australian Aboriginal community schools, where access to self-regulation interventions is limited.

Study protocol for a self-controlled cluster randomised trial of the Alert Program to improve self-regulation and executive function in Australian Aboriginal children with fetal alcohol spectrum disorder.

INTRODUCTION: While research highlights the benefits of early diagnosis and intervention for children with fetal alcohol spectrum disorders (FASD), there are limited data documenting effective interventions for Australian children living in remote communities. METHODS AND ANALYSIS: This self-controlled cluster randomised trial is evaluating the effectiveness of an 8-week Alert Program school curriculum for improving self-regulation and executive function in children living in remote Australian Aboriginal communities. Children in grades 1-6 attending any of the eight participating schools across the Fitzroy Valley in remote North-West Australia (N ≈ 363) were invited to participate. Each school was assigned to one of four clusters with clusters randomly assigned to receive the intervention at one of four time points. Clusters two, three and four had extended control conditions where students received regular schooling before later receiving the intervention. Trained classroom teachers delivered the Alert Program to students in discrete, weekly, 1-hour lessons. Student outcomes were assessed at three time points. For the intervention condition, data collection occurred 2 weeks immediately before and after the intervention, with a follow-up 8 weeks later. For control conditions in clusters two to four, the control data collection matched that of the data collection for the intervention condition in the preceding cluster. The primary outcome is change in self-regulation. FASD diagnoses will be determined via medical record review after the completion of data collection. The results will be analysed using generalised linear mixed modelling and reported in accordance with Consolidated Standards of Reporting Trials (CONSORT) guidelines. ETHICS AND DISSEMINATION: Ethical approval was obtained from the University of Western Australia (WA) (RA/4/1/7234), WA Aboriginal Health Ethics Committee (601) and WA Country Health Service (2015:04). The Kimberley Aboriginal Health Planning Forum Research Sub-Committee and WA Department of Education also provided approval. The results will be disseminated through peer-reviewed journals, conference presentations, the media and at forums. TRIAL REGISTRATION NUMBER: ACTRN12615000733572; Pre-results.

Behavior in Children with Fetal Alcohol Spectrum Disorders in Remote Australia: A Population-Based Study.

OBJECTIVE: To document behavior in children residing in very remote Western Australian communities as rated by parent/caregivers and teachers. We hypothesized that children with fetal alcohol spectrum disorders (FASD) would have higher rates of problematic behavior than children without FASD. METHODS: The Child Behavior Checklist (CBCL; n = 97), and Teacher Report Form (TRF; n = 106) were used in this population-based study. Raw scores, proportions scoring within "Normal/Borderline/Clinical" ranges, and frequencies of Critical items were determined. Mann-Whitney U and χ tests were used for between-group comparisons. RESULTS: Children were aged from 7.5 to 9.6 years, and 19% had FASD. Academic performance was commonly rated in the "Borderline/Clinical" range (73%). Teacher-rated scores were poorer in the FASD group on 15 scales encompassing total and internalizing problems, adaptive function, academic performance, attention, withdrawn/depressed, social problems, posttraumatic stress, thought problems, and sluggish cognitive tempo (p < .05). More children in the FASD group had scores in the "Borderline/Clinical" range on 11 TRF scales (p < .05). "Physically attacks people" was the most prevalent Critical item endorsed by teachers for the total cohort (22%). "Talks about killing self" was endorsed by teachers more often in the FASD group (14%) than the Non-FASD group (1%; p = .03). There were no significant differences between groups in parent-reported CBCL scores after adjustment for multiple comparison testing. CONCLUSION: This study demonstrates that children with FASD have more teacher-reported behavioral impairment than children without FASD. In remote Australian communities, academic performance is poor.

Emotional Understanding in School-Aged Children with Fetal Alcohol Spectrum Disorders: A Promising Target for Intervention.

BACKGROUND: Children with fetal alcohol spectrum disorders (FASD) are at high risk for secondary conditions, including mental health difficulties. Data on both children with typical development and other clinical conditions suggest that limited emotional understanding (EU) raises risk for psychopathology, but little is known about EU in FASD. OBJECTIVES: To determine if EU is a reasonable treatment target for children with FASD. METHODS: 56 children (6-13 years) with FASD completed the Kusche Affective Interview-Revised, a verbal interview measure of EU. RESULTS: Children showed striking delays in EU (2-5 years delay) relative to published normative data, despite mean IQ (IQ=94.56) within normal limits. Individual variability was considerable even after accounting for age and verbal IQ. CONCLUSIONS: Despite variability in individual differences, treatments targeting EU may benefit children with FASD as components within a comprehensive, tailored intervention focused on child self-regulation and caregiver behavior management.

Soft neurological signs and prenatal alcohol exposure: a population-based study in remote Australia.

AIM: To identify soft neurological signs (SNS) in a population-based study of children living in remote Aboriginal communities in the Fitzroy Valley, Western Australia, born between 2002 and 2003 and explore the relationship between SNS, prenatal alcohol exposure (PAE), and fetal alcohol spectrum disorders (FASD). METHOD: The presence of SNS was assessed using the Quick Neurological Screening Test, 2nd edition (QNST-2), which has a total maximum score of 140. Higher scores indicated more SNS. 'Severe discrepancy' was defined as scores less than or equal to the fifth centile while 'moderate discrepancy' represented scores from the sixth to the 24th centile. Children were assigned FASD diagnoses using modified Canadian FASD diagnostic guidelines. RESULTS: A total of 108 of 134 (80.6%) eligible children (mean age 8y 9mo, SD=6mo, 53% male) were assessed. The median QNST-2 Total Score for all participants was within the normal category (19.0, range 4-66). However, the median QNST-2 Total Score was higher in children with than without (1) PAE (r=0.2, p=0.045) and (2) FASD (r=0.3, p=0.004). Half (8/16) of children scoring 'moderate discrepancy' and all (2/2) children scoring 'severe discrepancy' had at least three domains of central nervous system impairment. INTERPRETATION: SNS were more common in children with PAE or FASD, consistent with the known neurotoxic effect of PAE. The QNST-2 is a useful screen for subtle neurological dysfunction indicating the need for more comprehensive assessment in children with PAE or FASD.

Prenatal Alcohol Exposure, FASD, and Child Behavior: A Meta-analysis.

CONTEXT: Fetal alcohol spectrum disorders (FASD) and prenatal alcohol exposure (PAE) are associated with behavioral difficulties, although there are no published systematic reviews that summarize and critique the literature. OBJECTIVE: To describe the behavioral characteristics of children with PAE and/or FASD, assessed using the Achenbach System of Empirically Based Assessments (ASEBA) for school-aged children with parent, teacher, and youth (self-report) forms. DATA SOURCES: Electronic literature databases, reference lists, hand-searches. STUDY SELECTION: peer-reviewed observational studies. DATA EXTRACTION: Study appraisal and data extraction were undertaken by 2 independent assessors. Meta-analyses were performed for parent-rated Internalizing, Externalizing, and Total problems scales. All other ASEBA scales were summarized qualitatively. RESULTS: Included were 23 articles; 16 were used in meta-analyses. Pooled results showed higher Total (mean difference 12.1, 95% confidence interval [95% CI] 7.7-16.5), Internalizing (6.3, 95% CI 3.1-9.5), and Externalizing problems scores (12.5, 95% CI 7.9-17.0) in FASD than No FASD; and greater odds of scoring in the "Clinical" range in FASD. Pooled results demonstrated higher problem scores in children with PAE (P > .05). Qualitative summaries of other scales from parents, teachers, and self-report show poorer behavior ratings in children with FASD and PAE on composite Problem and Competence scores and many Syndrome subscales. LIMITATIONS: Findings were restricted to behaviors assessed using the ASEBA. The published literature was limited, often with only 1 study reporting on a particular scale. CONCLUSIONS: Meta-analysis reveals that FASD and PAE are associated with problematic behavior in many, but not all domains. This clearly affects families, and should be considered in clinical practice by providers.

Prevalence of fetal alcohol syndrome in a population-based sample of children living in remote Australia: the Lililwan Project.

AIM: Aboriginal leaders concerned about high rates of alcohol use in pregnancy invited researchers to determine the prevalence of fetal alcohol syndrome (FAS) and partial fetal alcohol syndrome (pFAS) in their communities. METHODS: Population-based prevalence study using active case ascertainment in children born in 2002/2003 and living in the Fitzroy Valley, in Western Australia (April 2010-November 2011) (n = 134). Socio-demographic and antenatal data, including alcohol use in pregnancy, were collected by interview with 127/134 (95%) consenting parents/care givers. Maternal/child medical records were reviewed. Interdisciplinary assessments were conducted for 108/134 (81%) children. FAS/pFAS prevalence was determined using modified Canadian diagnostic guidelines. RESULTS: In 127 pregnancies, alcohol was used in 55%. FAS or pFAS was diagnosed in 13/108 children, a prevalence of 120 per 1000 (95% confidence interval 70-196). Prenatal alcohol exposure was confirmed for all children with FAS/pFAS, 80% in the first trimester and 50% throughout pregnancy. Ten of 13 mothers had Alcohol Use Disorders Identification Test scores and all drank at a high-risk level. Of children with FAS/pFAS, 69% had microcephaly, 85% had weight deficiency and all had facial dysmorphology and central nervous system abnormality/impairment in three to eight domains. CONCLUSIONS: The population prevalence of FAS/pFAS in remote Aboriginal communities of the Fitzroy Valley is the highest reported in Australia and similar to that reported in high-risk populations internationally. Results are likely to be generalisable to other age groups in the Fitzroy Valley and other remote Australian communities with high-risk alcohol use during pregnancy. Prevention of FAS/pFAS is an urgent public health challenge.

Exploring the utility of narrative analysis in diagnostic decision making: picture-bound reference, elaboration, and fetal alcohol spectrum disorders.

PURPOSE: To evaluate classification accuracy and clinical feasibility of a narrative analysis tool for identifying children with a fetal alcohol spectrum disorder (FASD). METHOD: Picture-elicited narratives generated by 16 age-matched pairs of school-aged children (FASD vs. typical development [TD]) were coded for semantic elaboration and reference strategy by judges who were unaware of age, gender, and group membership of the participants. Receiver operating characteristic (ROC) curves were used to examine the classification accuracy of the resulting set of narrative measures for making 2 classifications: (a) for the 16 children diagnosed with FASD, low performance (n = 7) versus average performance (n = 9) on a standardized expressive language task and (b) FASD (n = 16) versus TD (n = 16). RESULTS: Combining the rates of semantic elaboration and pragmatically inappropriate reference perfectly matched a classification based on performance on the standardized language task. More importantly, the rate of ambiguous nominal reference was highly accurate in classifying children with an FASD regardless of their performance on the standardized language task (area under the ROC curve = .863, confidence interval = .736-.991). CONCLUSION: Results support further study of the diagnostic utility of narrative analysis using discourse level measures of elaboration and children's strategic use of reference.