ObjectiveTo determine the association between coronavirus disease 2019 (COVID-19) restrictions and paediatric mental health emergency department presentations.MethodsSecondary analysis of Victorian Emergency Minimum Dataset data from 38 Victorian public hospital emergency departments. Paediatric patients (birth to <18 years) attending emergency departments with an International Classification of Disease-Australian Modification (ICD-10-AM) diagnosis of a mental health problem between 1 January

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... 18 and 31 October 2020 were included. We compared pre-COVID-19 (1 January 2018-27 March 2020) to the COVID-19 period (28 March-26 October 2020) to examine the number of mental health presentations by patient age, socioeconomic status, location, and emergency department triage category. A Poisson regression prediction model was built for each diagnosis group to predict the presentation number in the COVID-19 period, assuming the pandemic and associated restrictions had not happened.ResultsThere were 15 898 presentations (589 presentations/month on average) in the pre-COVID-19 period and 4747 presentations (678 presentations/month on average) in the COVID-19 period. Compared with predicted presentations, there was an increase in observed presentations for eating disorders throughout lockdown (on average, an increase of 36 presentations/month) and for anxiety (11/month) and self-harm (18/month). There were no meaningful changes for mood disorders or developmental and behavioural problems, and presentations for substance abuse mostly fell.ConclusionsPandemic restrictions were associated with increased emergency department presentations for eating disorders and, to a lesser extent, anxiety and self-harm. Given the ongoing pandemic, clinicians and policy makers must work together to find timely, accessible solutions to better manage these conditions.