Trends in obesity at the national and local level among South Korean adolescents.

Obesity is a global phenomenon affecting all socioeconomic groups, irrespective of age, gender or ethnicity. In many countries, obesity trends are causing serious public health concerns threatening the viability of basic health care delivery. In this article, we examine the trends of adolescent obesity at the national level in South Korea introducing a new approach for visualising data at the local level based on linked micromap plots. Our analysis shows that the obesity rates for 2013 have only increased slightly since 2006 for South Korean adolescents of both genders in various age groups. However, considerable increases could be observed for the subgroup of adolescent males and adolescent females living in rural areas. Trends at the local level show a slight increase of the prevalence of obesity in most regions of the country, with the highest obesity prevalence found in the Northeast.