While most teenagers (60 percent) spend on average 20 hours per week in front of television and computer screens, a third spend closer to 40 hours per week, and about 7 percent are exposed to more than 50 hours of ‘screen-time’ per week, according to a study presented at the American Heart Association’s 48th Annual Conference on Cardiovascular Disease Epidemiology and Prevention.

Researchers looked at patterns of screen-time through high school, including total time viewing television, video, computer and the Internet. Then they examined the influence of neighborhood social factors on distinct patterns of screen-time.  read more »