This pilot study evaluated whether cognitive behavioral therapy for anger and aggression, added to treatment as usual, was associated with reductions in irritability and suicidal ideation in preteen children with externalizing disorders. Children aged 8 to 12 years who were referred to an outpatient child psychiatry clinic for irritability, anger outbursts, or reactive aggression were assigned to CBT-AA plus treatment as usual or treatment as usual alone. The intervention included individual child sessions focused on emotion regulation, problem-solving, and social skills, with parent guidance sessions. Irritability and suicidal ideation were assessed at baseline, during treatment, at the end of treatment, and at follow-up.

This was a partially randomized, pragmatic pilot study conducted in a child psychiatric outpatient clinic at Geha Mental Health Center in Israel. The study included children aged 8 to 12 years with externalizing disorders, including ADHD, oppositional defiant disorder, intermittent explosive disorder, disruptive mood dysregulation disorder, or conduct disorder, who were referred because of clinically significant irritability and/or reactive aggression.

Participants were assigned to cognitive behavioral therapy for anger and aggression plus treatment as usual or to treatment as usual alone. During the initial treatment cycle, allocation was conducted using a computerized randomization procedure with sequentially numbered, sealed opaque envelopes and stratification by recent suicidal ideation or suicidal behavior. In later treatment cycles, assignment was constrained by therapist availability and scheduling within the outpatient service. For these later assignments, participants were allocated according to treatment capacity and order of referral rather than by participant clinical characteristics.

CBT-AA was delivered as an individual, in-person, protocol-based treatment. The intervention focused on three main domains: emotion regulation, social problem-solving, and social skills. Treatment as usual consisted of routine psychiatric consultation, pharmacological treatment when indicated, and non-behavioral psychosocial interventions available through the clinic.

The primary outcome was irritability, assessed with the Irritability and Dysregulation of Emotions Questionnaire-13 and the Affective Reactivity Index. Secondary outcomes included suicidal ideation and suicidal behavior assessed using the Columbia-Suicide Severity Rating Scale. Assessments were conducted at baseline, after treatment modules, at the end of treatment, and during follow-up.

The study was approved by the Institutional Helsinki Committee of Geha Mental Health Center. This record is being submitted retrospectively.

Inclusion Criteria:

• Child age 8 to 12 years
• Parent or guardian able to read and write in Hebrew
• Receiving care in the Geha outpatient child and adolescent clinics
• Clinical diagnosis of ADHD, oppositional defiant disorder, intermittent explosive disorder, disruptive mood dysregulation disorder, or conduct disorder
• Irritability and/or reactive aggression as the reason for treatment seeking

Exclusion Criteria:

• Psychotic disorder or bipolar disorder
• Substance use
• Autism spectrum disorder
• IQ score less than 75 or clinical diagnosis of intellectual disability
• Immediate suicide risk requiring hospitalization as determined by the referring clinician

De-identified individual participant data that underlie the published results may be made available upon reasonable request to the corresponding author, subject to approval by the study investigators and applicable institutional and ethics requirements. Data will not be publicly posted because the dataset includes sensitive pediatric mental health and suicidality information.

Beginning 6 months after publication and available for 5 years.

De-identified individual participant data underlying the published results and analytic code may be made available to qualified researchers upon reasonable request to the corresponding author. Requests should include a methodologically sound proposal and will be reviewed by the study investigators. Data sharing will be subject to applicable institutional approval, ethics requirements, and a data use agreement. Data will not be publicly posted because they include sensitive pediatric mental health and suicidality information.

None (Open Label). Participants and research staff were not blinded to treatment allocation. Therapists were not involved in outcome measurement. Outcomes were based primarily on parent- and child-report questionnaires, with suicidality assessed by research clinicians.