Socioeconomic patterning of smoking, sedentary lifestyle, and overweight status among adolescents in Norway and the United States.

Increased efforts are needed to promote adolescent health in all areas investigated in this study. Differences both in prevalence and socioeconomic patterning between Norway and the United States indicate that the major challenges differ between the two countries. The results also emphasize the need to undertake joint efforts to use measurements that make national data sets comparable across countries.