Transition to adulthood is the period of onset of most serious mental disorders. The current discontinuity of care between Child and Adolescent Mental Health (CAMHS) and Adult Mental Health (AMHS) Services is a major socioeconomic and societal challenge for the EU.

In the framework of the MILESTONE project this study aims to map current services and transitional policies across Europe, highlighting current gaps and the need for innovation in care provision.

An on-line mapping survey has been conducted across all 28 European countries through the administration of two ad-hoc instruments: the Standardized Assessment Tool for Mental Health Transition (SATMEHT) and the European CAMHS Mapping Questionnaire (ECM-Q). The survey systematically collected data about CAMHS organization and characteristics, with a specific focus on actual national transition policies and practice.

Response rate was 100%. Despite up to 49% of CAMHS service users need to continue with specialist AMHS care, written policies for managing the interface between these two services are available only in 4/28 countries and transition support services are reported as missing by half of the respondents. Lack of connection between CAMHS and AMHS is reported as the major (82%) difficulty experienced by young service users.

Preliminary results indicate a marked variability in characteristics of services and in data activity among the 28 European countries, with important missing information at national level about CAMHS and their functioning. All these conclusions warrant an improvement in data collection and service planning and delivery.

The authors have not supplied their declaration of competing interest.