Scalable digital mental health tools for children have long promised to close the gap between need and access — but evidence on whether their benefits endure beyond short follow-up windows has been sparse. A two-year randomized follow-up from Finland now adds meaningful longitudinal data to that question, suggesting internet-delivered cognitive behavioral therapy can produce lasting anxiety reduction in pre-adolescents identified through population-level school screening.
The Master Your Worries trial enrolled 465 Finnish children aged 10–13 (71% girls) who were flagged as having elevated anxiety through universal school-based screening. Participants were randomized to either a structured 10-module internet-based CBT program supplemented by telephone coaching sessions, or a digital psychoeducation control. Anxiety outcomes were tracked using the Screen for Child Anxiety Related Disorders across both child and parent report versions (SCARED-C/P), with secondary measures covering anxiety-related functional impairment, child depression, and overall stress load, assessed at 12 and 24 months post-intervention.
This trial sits at a productive intersection of several active research fronts: stepped-care pediatric mental health delivery, telehealth scalability, and early secondary prevention of anxiety disorders. Most iCBT studies for youth report outcomes at three to six months; 24-month data substantially raise the evidentiary bar. Critically, population-level screening as an entry point — rather than clinical referral — means findings may reflect a broader and milder symptom range than typical clinic-based trials, which both strengthens generalizability and complicates interpretation, since regression to the mean is harder to rule out relative to a waitlist control. The psychoeducation comparator, while a credible active control, differs meaningfully from treatment-as-usual in most health systems. The predominantly female sample also warrants attention, given known sex differences in anxiety presentation and treatment response. Cumulatively, this study reads as a confirmatory step forward — not a paradigm shift — but the combination of randomized design, extended follow-up, and school-based recruitment makes it one of the stronger data points yet for digitally delivered anxiety care in middle childhood.
