Forebygging av psykiske lidelser hos barn: Systematisk oversikt for beslutningstakere

Preventing mental disorders in children: a systematic review to inform policy-making

Waddell, C. Hua, J. M. Garland, O. M. Peters, R. D. McEwan, K.
Canadian Journal of Public Health. Revue Canadienne de Sante Publique
BACKGROUND: At any given time, 14% of Canadian children experience clinically significant mental disorders, which frequently persist into adulthood. Canadian public policy has emphasized specialized treatment services, yet these services only reach 25% of children with disorders. Prevention programs hold potential to reduce the number of children with disorders in the population. To inform policy-making, we systematically reviewed the best available research evidence on programs for preventing conduct disorder (CD), anxiety and depression, three of the most prevalent mental disorders in children. METHODS: We systematically identified and reviewed randomized controlled trials (RCTs) on programs intended to prevent CD, anxiety and depression in children aged 0-18 years. RESULTS: Fifteen RCTs met selection criteria: nine (on eight programs) for preventing CD; one for anxiety; four (on three programs) for depression; and one for all three. Ten RCTs demonstrated significant reductions in child symptom and/or diagnostic measures at follow-up. The most noteworthy programs, for CD, targeted at-risk children in the early years using parent training (PT) or child social skills training (SST); for anxiety, employed universal cognitive-behavioural training (CBT) in school-age children; and for depression, targeted at-risk school-age children, also using CBT. Effect sizes for these noteworthy programs were modest but consequential. There were few Canadian studies and few that evaluated costs. DISCUSSION: Prevention programs are promising but replication RCTs are needed to determine effectiveness and cost-effectiveness in Canadian settings. Four program types should be priorities for replication: targeted PTand child SST for preventing CD in children's early years; and universal and targeted CBTfor preventing anxiety and depression in children's school-age years. Conducting RCTs through research-policy partnerships would enable implementation in realistic settings while ensuring rigorous evaluation. Prevention merits new policy and research investments as part of a comprehensive public health strategy to improve children's mental health in the population.

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Type of intervention

Preventive- and Promotive Health Interventions

Early Intervention


Mental Health Problems and Disorders

Behavior Problems

Externalizing Behaviors / Challenging Behaviors

Emotional Problems

Depression and Depressed Mood

Anxiety Problems

Anxiety and Anxiousness


Psychological Treatments

Parent Guidance / Therapy

Cognitive Behavioral Therapy, Behavioral Therapy and Cognitive Therapy

Age group

Infants and Toddlers (0-2 years)

Preschool Aged Children (3-5 years)

School Aged Children (6-12 years)

Adolescents (13-18 years)

Age not specified

More information
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