A new study by the World Health Organization Regional Office for Europe (WHO/Europe) has identified significant inconsistencies in how mental health is measured across the European Region, highlighting the need for standardized monitoring systems to improve policymaking and healthcare planning.
The review analyzed 75 peer-reviewed studies and identified 450 different mental health indicators, demonstrating substantial variation in how researchers assess mental health status, risk factors, and outcomes. This fragmentation makes it difficult to compare data across countries, monitor trends over time, and evaluate the effectiveness of mental health policies and interventions.
The findings come as mental health continues to pose a growing public health challenge in Europe. In 2021, more than 143 million people, representing 16% of the region’s population, were living with a mental health condition. The COVID-19 pandemic further intensified the crisis, with the prevalence of mental health disorders estimated to have increased by 25% compared to pre-pandemic levels in 2019. The pandemic also exposed weaknesses in mental health data collection, limiting governments’ ability to respond quickly and effectively during the health emergency.
The study found that most existing indicators focus on measuring mental health conditions and associated risk factors, while comparatively few assess the quality, accessibility, and performance of mental health services. Researchers also observed uneven geographic representation, with studies concentrated mainly in Northern and Western Europe, leaving important evidence gaps in other parts of the region.
WHO/Europe emphasized that stronger alignment between research indicators and national monitoring systems is essential for improving evidence-based policymaking. Standardized yet flexible measurement approaches would enable better international comparisons while reflecting cultural and population differences.
The findings will contribute to the development of a new regional mental health monitoring framework, designed to strengthen surveillance, improve service evaluation, enhance accountability, and support more effective investment in mental health systems across Europe. The study forms part of a joint initiative between WHO/Europe and the European Commission to strengthen mental health policies, improve service delivery, and promote well-being across the European Union, Iceland, and Norway through coordinated, evidence-based action.







