Strengthening specialized capacity in Greek public services through the co-development and implementation of psychotherapeutic protocols for child and adolescent mental health conditions

IntroductionDespite evidence supporting child and adolescent cognitive behavioural therapy (CBT) globally, interventions remain largely unavailable within public systems. This gap requires implementation models integrating development, training, and scalability research within real-world settings and changes in management structures. Here we developed and implemented manualised psychotherapeutic protocols through a national capacity-building initiative in Greece. MethodsWe designed a structured implementation pathway conducted through the Child and Adolescent Mental Health Initiative (CAMHI), a public-private partnership involving clinical and academic institutions across Greece: (1) pre-implementation research through national reviews and national surveys of health professionals; (2) co-development and iterative pilot implementation of evidence-based interventions through supervised practice within the National Health System; and (3) dissemination research supporting scalability and institutionalisation within public structures. ResultsPre-implementation research identified gaps in the availability of clinical protocols in Greek services; a survey of 120 psychologists and psychiatrists indicated the need for psychotherapeutic training. Three evidence-based protocols were co-developed: CBT for anxiety (6-12 years), CBT for depression (12-17 years), and behavioural parent training (BPT) for disruptive behaviour (4-14 years). During a three-stage pilot, 45 clinicians delivered interventions to 140 cases (anxiety n=52; depression n=25; BPT n=63); 117 (83{middle dot}5%) completed treatment. Significant symptom reductions were observed for anxiety (d=-2{middle dot}92; RCADS-25), depression (d=-1{middle dot}79, RCADS-25), and disruptive behaviour (d=-2{middle dot}3, SNAP-IV), with 63%, 38% and 44% showing reliable improvement at the treatment endpoint. A train-the-trainer model is under implementation for national scale-up. Institutionalisation includes integration into child and adolescent psychiatry curricula. Sustainability safeguards were established through Law 5015/2023, with the Ministry of Health assuming operations by 2027. DiscussionPilot results demonstrate the feasibility of evidence-based psychotherapeutic interventions embedded within real-world child and adolescent services in Greece. Integrated implementation approaches provide a viable pathway for developing, refining, and scaling clinical manuals within public health provision.