Youth or Young Adults: Which Group Is at Highest Risk for Tobacco Use Onset?

Purpose Historically, adolescence has been regarded as the time when most tobacco use initiation occurs. This study examines the initiation of tobacco product use, including cigarettes, e-cigarettes, cigar products, and hookah, among contemporary youth and young adults, to determine whether the developmental timing (youth vs. young adulthood) of initiation has changed. Methods Three cohort studies were used to examine the onset of ever use and...