School performance in children with prenatal drug exposure and out-of-home care in NSW, Australia: a retrospective population-based cohort study.

BACKGROUND: Prenatal drug exposure (PDE) is a global public health problem that is strongly associated with the need for child protection services, including placement into out-of-home care (OOHC). We aimed to assess school outcomes for children with PDE (both with and without neonatal abstinence syndrome [NAS]) and the association of school performance with OOHC. METHODS: Using linked population health, OOHC, and school test data, we compared results on the Australian standardised curriculum-based test, the National Assessment Program-Literacy and Numeracy (NAPLAN), for children with PDE who were born in New South Wales (NSW) between 2001 and 2020 and had completed at least one NAPLAN test between Jan 1, 2008, and June 30, 2021, administered in Year 3 (age 8-9 years), Year 5 (age 10-11 years), Year 7 (age 12-13 years), or Year 9 (age 14-15 years). Linked datasets included NSW Perinatal Data Collection (birth data), NSW Admitted Patient Data Collection (hospital diagnoses), NSW Education Standards Authority (NAPLAN scores), NSW Family and Community Services Dataset-KiDS Data Collection (OOHC information), NSW Mental Health Ambulatory Data Collection, and NSW Registry for Births, Deaths, and Marriages. The primary outcome was scoring above or below the National Minimum Standard (NMS) in any test domain (mathematics, language, writing, and spelling) at each year level, comparing the relative risk of scoring below NMS between children with and without PDE (and with or without NAS within the PDE group), and with and without OOHC contact. The association between OOHC on the likelihood of scoring above NMS was also investigated for PDE and non-PDE cohorts. FINDINGS: The PDE cohort included 3836 children, and the non-PDE cohort included 897 487 children. Within the PDE cohort, 3192 children had a NAS diagnosis and 644 children had no NAS diagnosis. 1755 (45·8%) children with PDE required OOHC compared with 12 880 (1·4%) of 897 487 children without PDE. Children with PDE were more likely than children without PDE to score below NMS in any domain from Year 3 (risk ratio 2·72 [95% CI 2·58-2·76]) to Year 9 (2·36 [2·22-2·50]). Performance was similar regardless of a NAS diagnosis (Year 3: 0·96 [0·84-1·10]; Year 9: 0·98 [0·84-1·15]). The likelihood of scoring above NMS in Year 9 was reduced for children with PDE and without NAS (0·57 [0·45-0·73]) and NAS (0·58 [0·52-0·64]) compared with those without PDE, and also for children who received OOHC (0·60 [0·57-0·64]) compared with those without OOHC, when adjusted for confounders. Among children with PDE, those receiving OOHC had a similar likelihood of scoring above NMS compared with children who did not receive OOHC, from Year 3 (1·01 [0·92-1·11]) to Year 9 (0·90 [0·73-1·10]), when adjusted for confounding factors. By contrast, among children without PDE, those receiving OOHC were less likely to score above NMS than those who did not receive OOHC, from Year 3 (0·78 [0·76-0·80]) to Year 9 (0·58 [0·54-0·61]). INTERPRETATION: Compared with children without PDE, school performance in children with PDE-regardless of whether they were diagnosed with NAS-is poor, and the gap widens with age. The risk of poor performance persists regardless of OOHC status. This finding underscores the need for all children with PDE to receive long-term, culturally sensitive, and proactive support to improve life success. FUNDING: SPHERE Mindgardens Neuroscience Network, Australian Red Cross, Alpha Maxx Healthcare, Centre for Research Excellence for Integrated Health and Social Care, National Health and Medical Research Council, and University of Sydney.

'Joining the Dots: Linking Prenatal Drug Exposure to Childhood and Adolescence' - research protocol of a population cohort study.

INTRODUCTION: Prenatal drug exposure (PDE) is one of the most important causes of child harm, but comprehensive information about the long-term outcomes of the families is difficult to ascertain. The Joining the Dots cohort study uses linked population data to understand the relationship between services, therapeutic interventions and outcomes of children with PDE. METHODS AND ANALYSIS: Information from routinely collected administrative databases was linked for all births registered in New South Wales (NSW), Australia between 1 July 2001 and 31 December 2020 (n=1 834 550). Outcomes for seven mutually exclusive groups of children with varying prenatal exposure to maternal substances of addiction, including smoking, alcohol, prescription/illicit drugs and neonatal abstinence syndrome will be assessed. Key exposure measures include maternal drug use type, maternal social demographics or social determinants of health, and maternal physical and mental health comorbidities. Key outcome measures will include child mortality, academic standardised testing results, rehospitalisation and maternal survival. Data analysis will be conducted using Stata V.18.0. ETHICS AND DISSEMINATION: Approvals were obtained from the NSW Population and Health Services Research Ethics Committee (29 June 2020; 2019/ETH12716) and the Australian Capital Territory Health Human Research Ethics Committee (11 October 2021; 2021-1231, 2021-1232, 2021-1233); and the Aboriginal Health and Medical Research Council (5 July 2022; 1824/21), and all Australian educational sectors: Board of Studies (government schools), Australian Independent Schools and Catholic Education Commission (D2014/120797). Data were released to researchers in September 2022. Results will be presented in peer-reviewed academic journals and at international conferences. Collaborative efforts from similar datasets in other countries are welcome.

Health Care Needs and Costs for Children Exposed to Prenatal Substance Use to Adulthood.

Importance: Children exposed to substance use during pregnancy have increased health needs but whether these are influenced by engagement in out-of-home care is uncertain. Objective: To evaluate the association between substance use during pregnancy, out-of-home care and hospitalization utilization, and costs from birth up to age 20 years. Design, Setting, and Participants: This was a retrospective cohort study using individual-linked population birth, hospital, and out-of-home care information of all liveborn infants from New South Wales, Australia, between 2001 and 2020 using longitudinal population-based linkage records from administrative databases. Substance use during pregnancy included newborns with neonatal abstinence syndrome (n = 5946) and intrauterine exposure to drugs of addiction (n = 1260) and other substances (eg, tobacco, alcohol, and illicit drugs or misused prescription drugs; n = 202 098). Children not exposed to substance use during pregnancy were those without known exposure to substance use during pregnancy (n = 1 611 351). Data were analyzed from July 2001 to December 2021. Main Outcomes: Main outcomes were hospital readmission, length of stay, and cost burden associated with substance use during pregnancy from birth up to age 20 years. Outcomes were investigated using 2-part and Poisson regression models adjusted for sociodemographic characteristics. Mediation analysis was used to evaluate whether the association of substance use during pregnancy with risk of readmission was mediated through engagement with out-of-home care. Results: Of the 1 820 655 live births, 935 807 (51.4%) were male. The mean (SD) age of mothers was 30.8 (5.5) years. Compared with children who were not exposed to substance use during pregnancy, those who were exposed incurred significantly higher birth hospital costs (adjusted mean difference, A$1585 per child [US$1 = A$1.51]; 95% CI, 1585-1586). If discharged alive, more children with exposure to substance use during pregnancy had at least 1 readmission (90 433/209 304 [43.4%] vs 616 425/1 611 351[38.3%]; adjusted relative risk [RR], 1.06; 95% CI, 1.06-1.07), most commonly for respiratory conditions (RR, 1.11; 95% CI, 1.09-1.12) and mental health/behavioral disorders (RR, 1.36; 95% CI, 1.33-1.41). Excess hospital costs associated with substance use during pregnancy were A$129.0 million in 2019 to 2020. Mediation analyses showed that any out-of-home care contact mediated the association between substance use during pregnancy and risk of inpatient readmission and lower health care cost (decreased by A$25.4 million). For children with neonatal abstinence syndrome, any out-of-home care contact mediated readmission risk by approximately 30%, from adjusted RR, 1.28; 95% CI, 1.19-1.35, to RR, 1.01; 95% CI, 0.98-1.02. Conclusion and Relevance: Children who were exposed to substance use during pregnancy incurred more hospital costs than children who were not exposed up to 20 years of age, but this was reduced in association with any contact with out-of-home care. This provides insights into possible strategies for reducing health and financial burdens associated with exposure to substance use during pregnancy for children.