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In that time the number of high school students trying tobacco for the first time, fell by 5 percentage points.

Groups were compared on smoking abstinence across 7 days (i.e., 7-day point prevalence) at the end of the smoking cessation intervention (about 12 days after their target quit date), and at 1-month and 6-month follow-ups (i.e., 1 and 6 months after their target quit date)

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Childhood attention-deficit/hyperactivity disorder (ADHD) and growth in adolescent alcohol use: the roles of functional impairments, ADHD symptom persistence, and parental knowledge