Internet addiction was found in every fifth adolescent. Accessibility and availability of Internet use is constantly growing and therefore it is necessary to define more sensitive diagnostic tools for the assessment of Internet addiction and its underlying causes, in order to implement effective preventive programs.

Sexual life of adolescents begins at the age of 16, on average, and only every third always uses contraceptive protection, which points to a need for better education on reproductive health by using contemporary methods. It is also necessary to increase availability of contraceptives (condoms) at all places where adolescents spend time (in schools, bars, cinemas, disco clubs etc.) in order to achieve responsible sexual behavior and protection of reproductive health among youth.

This study showed that children's and parents' level of knowledge about healthy food is satisfactory, but it is not enough for healthy behavior, so there is a need for additional effort in health education and health promotion in youth population.

Quality of life is getting a more and more important place in medical investigations. Quality of life measurement in children population is still insufficiently explored and associated with numerous methodological problems. The existing instruments for quality of life measurement in children significantly differ, and their selection must depend on their psychometric characteristics.

Considering the existing situation concerning the high prevalence of obesity, urgent public action is necessary. It is essential to develop preventive strategies which would affect the whole society. Healthy lifestyle, balanced diet and increased physical activity must be promoted. However, it is not the responsibility of individuals. Health services, the community, food industry, mass media etc, have a crucial role in modifying body weight. Strategies for prevention and management of obesity should be in accordance with the existing public health policy and programs for prevention of noncommunicable diseases.