WHO European Childhood Obesity Surveillance Initiative (COSI)
The WHO European Childhood Obesity Surveillance Initiative (or COSI), is a unique system that for over 10 years has measured trends in overweight and obesity among primary school aged children. COSI involves taking standardized weight and height measurements from over 300 000 children across the WHO European Region, providing nationally representative data for participating countries, as well as a large Region-wide data set for analysis of the determinants of childhood overweight and obesity. This vital collaboration between WHO/Europe and research institutions from across the Region provides high-quality data to inform policy and practice to respond to the problem of childhood overweight and obesity.
Over 40 Member States of the Region will participate in the fifth round of COSI during the 2018–2019 school year.
