Exposure to smoking in movies appears to be associated with adolescents’ risk of becoming established smokers who have used at least 100 cigarettes in their lifetimes, according to a report in the September issue of Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals.

Parents, doctors, and others have wondered whether common treatments for attention deficit hyperactivity disorder (ADHD) inadvertently predispose adolescents to future drug abuse. The answer may depend on the age at which treatment is started and how long it lasts, say the authors of a new brain-imaging and behavioral study conducted in animals at the U.S. Department of Energy's Brookhaven National Laboratory.

A Canadian study has confirmed what parents have long suspected: dating, sexual activity and substance use seem to make teens feel older than they really are. And, as adolescents get older, the gap between their chronological age and their self-perceived age widens.

Teenagers who stay up late on school nights and make up for it by sleeping late on weekends are more likely to perform poorly in the classroom. This is because, on weekends, they are waking up at a time that is later than their internal body clock expects.

Researchers at University of Missouri-Columbia's Institute of Public Policy recently conducted a study on seatbelt use among Missouri teens. Based on the study results, the researchers recommend that the state continue its teen-focused information campaign and enact primary enforcement seatbelt laws.

Eating disorders may be overlooked in some groups - boys and some ethnicities - by physicians accustomed to diagnosing the condition in white teenage girls, say researchers at Lucile Packard Children's Hospital and the Stanford University School of Medicine.

Research shows that adolescents who engage in one form of risky behavior, like drug or alcohol use, are likely to engage in other risky behaviors like self-harm, or having unprotected sex, but often times these behaviors are not discussed during a medical or mental health exam. Now, a new study shows that a simple and brief screening measure called the adolescent risk inventory (ARI) can quickly identify the broad range of risk behaviors found among adolescents.

Participating in moderate to vigorous physical activity and limiting time in front of the television are some of the keys to successful weight loss in teens, according to researchers at the University of Minnesota Medical School.