Objective: The aim of this study was to describe the clinical presentation of preschoolers diagnosed with moderate to severe attention-deficit/hyperactivity disorder (ADHD) recruited for the multisite Preschool ADHD Treatment Study (PATS). The diagnosis and evaluation process will also be described. Method: A comprehensive multidimensional, multi-informant assessment protocol was implemented including the semistructured PATS Diagnostic Interview. Parent- and teacher-report measures were used to supplement information from interviews. Consensus agreement by a cross-site panel on each participant's diagnoses was required. Analyses were conducted to describe the sample and to test associations between ADHD severity and demographic and clinical variables. Results: The assessment protocol identified 303 preschoolers (3–5.5 years) with moderate to severe ADHD Hyperactive/Impulsive or Combined type. The majority of participants (n = 211, 69.6%) experienced co-morbid disorders, with oppositional defiant disorder, communication disorders, and anxiety disorders being the most common. Participants with co-morbid communication disorders were found to be more anxious and depressed. ADHD severity was found to correlate with more internalizing difficulties and lower functioning. Although boys and girls had similar symptom presentations, younger children had significantly higher ADHD severity. Conclusions: Preschoolers with moderate to severe ADHD experience high co-morbidity and impairment, which have implications for both assessment and treatment.

Objective: The purpose of this study was to examine the feasibility and effectiveness of a suicide prevention smartphone application.Method: Thirty‐six non‐Aboriginal Australians aged between 16 and 42 years (67% female) were recruited from a tertiary mental health service where they were receiving treatment for suicide risk. Participants were asked to use the BeyondNow safety planning smartphone application to manage their suicide safety plan during a 2‐month trial, as an adjunct to treatment as usual. A survey battery designed to measure feasibility and effectiveness of the smartphone app plus treatment as usual intervention was completed at baseline and follow‐up.Results: A vast majority of participants used the app to view and edit their safety plans and reported that the app was easy to use. A reduction was observed in participant severity and intensity of suicide ideation, and suicide‐related coping increased significantly. No significant changes were observed in suicide resilience.Conclusions: The BeyondNow safety planning smartphone application was shown to be feasible and effective as an adjunct to mental health treatment among patients at risk of suicide.