The Health Behavior in School-aged Children (HBSC) study provides unique insight into the health and behavior of young people. The report on the 2001/2002 survey gives information about a much-neglected segment of society, but one that has the greatest potential to benefit from policies and health initiatives based on sound research and information. This HBSC international report is relevant to all people working for and with this age group, be they policy-makers, planners, educators, teachers, parents, care givers and of course, young people themselves. The survey was carried out over a wide geographical area - 35 countries and regions in the WHO European Region and North America - and covers the physical, emotional, and psychological aspects of health, and the influences of the family, schools, and peers. The quality and value of the information offered are high, so this international report should reach all key people who have an interest in or are responsible for promoting young people's health.