A longitudinal analysis from the PATH study found that cannabis use among U.S. youths and young adults was associated with a higher likelihood of progressing to regular tobacco use. Among adolescents aged 12–17 years who used cannabis in 2017, 32.7% became regular tobacco users by 2021—an absolute increase of 15.6 percentage points compared with matched nonusers—while 14.0% of young adult cannabis users (aged 18–24 years) did so, a 5.4–percentage point increase. Researchers estimated that cannabis use accounted for roughly 13% of all new regular tobacco use in 2021, or about 509,800 additional users nationwide.

Source: Tobacco Control