-- Robert Preidt
MONDAY, March 28 (HealthDay News) -- Teenagers who begin smoking
at an early age are much more likely to start using marijuana by
the time they're 17, researchers report.
Their analysis of data from a Finnish-American birth cohort
study that began in 1994 found that by the time they were 17, about
15 percent of girls and 12 percent of boys had used marijuana or
other illicit substances at least once.
Predictors of drug use included being female, binge drinking,
father's binge drinking, peers who smoked, acquaintances with drug
experience, and aggressive behavior among boys.
The researchers also found that starting smoking at an early age
was an especially strong predictor of drug use. Participants who
started smoking by age 12 or earlier were 26 times more likely to
start using drugs by age 17 than those who never smoked.
"The findings support the gateway hypothesis, which asserts that illicit substances such as tobacco and alcohol are a stepping stone to harder, illicit drugs," project team member Tellervo Korhonen, of the University of Helsinki, said in an Academy of Finland news release. The academy funded the project.
"The theory has come under much criticism in recent years. Many have argued that certain common factors may explain both smoking and drug use, factors such as problem behavior and genetic influences. That's why we wanted to look into these issues more deeply in our studies," Korhonen added.
The findings appeared recently in the
Journal of the American Academy of Child and Adolescent
The U.S. Centers for Disease Control and Prevention has more
youth and tobacco.
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