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Background: Early identification and intervention for mental health (MH) problems in childhood offers lifelong benefits. Many children with MH problems do not receive appropriate help. To address this need, an online universal MH screening tool, the Growing Minds Check-In for parents/caregivers (GMCI-P), was developed to provide feedback to parents on their children's MH, identify children at risk of MH problems, and link parents to evidence-based online programs/information, with the goal of facilitating parent help-seeking, and ultimately reducing the prevalence of child MH problems., Methods/design: A randomised controlled trial (RCT) with 440 parents/caregivers will be conducted to 1) examine the efficacy of GMCI-P for increasing parent help-seeking; 2) explore acceptability; and 3) cost-effectiveness. Participants will be Australian parents/caregivers with a child aged from birth to 17 years, 6 months, who will be randomly allocated to GMCI-P (intervention) or waitlist control (WLC) group, and complete baseline measures. The intervention group will complete the GMCI-P immediately, the post-GMCI-P intervention questions, a three-month and six-month follow-up. The WLC group will receive access to GMCI-P after their three-month follow-up but will not be followed up further. The primary outcome is parent help-seeking behaviour for child MH, and secondary outcomes include child MH, parenting, parent wellbeing, acceptability, cost-effectiveness, and unintended negative effects., Discussion: The results from this study will provide efficacy, acceptability and cost-effectiveness data on a universal online, parent-report child MH Check-In. These results can be used to inform public policy on universal screening for child MH., Trial Registration: ACTRN12624000098538., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2025 The Authors. Published by Elsevier Inc. All rights reserved.)

Background: Anxiety disorders and treatment-resistant major depressive disorder (TRD) are often comorbid. Studies suggest ketamine has anxiolytic and antidepressant properties., Aims: To investigate if subcutaneous racemic ketamine, delivered twice weekly for 4 weeks, reduces anxiety in people with TRD., Method: The Ketamine for Adult Depression Study was a multisite 4-week randomised, double-blind, active (midazolam)-controlled trial. The study initially used fixed low dose ketamine (0.5 mg/kg, cohort 1), before protocol revision to flexible, response-guided dosing (0.5-0.9 mg/kg, cohort 2). This secondary analysis assessed anxiety using the Hamilton Anxiety (HAM-A) scale (primary measure) and 'inner tension' item 3 of the Montgomery-Åsberg Depression Rating Scale (MADRS), at baseline, 4 weeks (end treatment) and 4 weeks after treatment end. Analyses of change in anxiety between ketamine and midazolam groups included all participants who received at least one treatment ( n = 174), with a mixed effects repeated measures model used to assess the primary anxiety measure. The trial was registered at www.anzctr.org.au (ACTRN12616001096448)., Results: In cohort 1 ( n = 68) the reduction in HAM-A score was not statistically significant: -1.4 (95% CI [-8.6, 3.2], P = 0.37), whereas a significant reduction was seen for cohort 2 ( n = 106) of -4.0 (95% CI [-10.6, -1.9], P = 0.0058), favouring ketamine over midazolam. These effects were mediated by total MADRS and were not maintained at 4 weeks after treatment end. MADRS item 3 was also significantly reduced in cohort 2 ( P = 0.026) but not cohort 1 ( P = 0.96)., Conclusion: Ketamine reduces anxiety in people with TRD when administered subcutaneously in adequate doses.