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Risk of marijuana’s ‘gateway effect’ overblown, new UNH research shows

DURHAM, N.H. — New research from the University of New Hampshire shows that the “gateway effect” of marijuana — that teenagers who use marijuana are more likely to move on to harder illicit drugs as young adults — is overblown.

Whether teenagers who smoked pot will use other illicit drugs as young adults has more to do with life factors such as employment status and stress, according to the new research. In fact, the strongest predictor of whether someone will use other illicit drugs is their race/ethnicity, not whether they ever used marijuana.

Conducted by UNH associate professors of sociology Karen Van Gundy and Cesar Rebellon, the research appears in the September 2010, issue of the Journal of Health and Social Behavior in the article, “A Life-course Perspective on the ‘Gateway Hypothesis.’ “

“In light of these findings, we urge U.S. drug control policymakers to consider stress and life-course approaches in their pursuit of solutions to the ‘drug problem,’ ” Van Gundy and Rebellon say.

The researchers used survey data from 1,286 young adults who attended Miami-Dade public schools in the 1990s. Within the final sample, 26 percent of the respondents are African American, 44 percent are Hispanic, and 30 percent are non-Hispanic white.

The researchers found that young adults who did not graduate from high school or attend college were more likely to have used marijuana as teenagers and other illicit substances in young adulthood. In addition, those who used marijuana as teenagers and were unemployed following high school were more likely to use other illicit drugs.

However, the association between teenage marijuana use and other illicit drug abuse by young adults fades once stresses, such as unemployment, diminish.

“Employment in young adulthood can protect people by ‘closing’ the marijuana gateway, so over-criminalizing youth marijuana use might create more serious problems if it interferes with later employment opportunities,” Van Gundy says.

In addition, once young adults reach age 21, the gateway effect subsides entirely.

“While marijuana use may serve as a gateway to other illicit drug use in adolescence, our results indicate that the effect may be short-lived, subsiding by age 21. Interestingly, age emerges as a protective status above and beyond the other life statuses and conditions considered here. We find that respondents ‘age out’ of marijuana’s gateway effect regardless of early teen stress exposure or education, work, or family statuses,” the researchers say.

The researchers found that the strongest predictor of other illicit drug use appears to be race-ethnicity, not prior use of marijuana. Non-Hispanic whites show the greatest odds of other illicit substance use, followed by Hispanics, and then by African Americans.

The University of New Hampshire, founded in 1866, is a world-class public research university with the feel of a New England liberal arts college. A land, sea, and space-grant university, UNH is the state’s flagship public institution, enrolling more than 12,200 undergraduate and 2,200 graduate students.

The American Sociological Association (www.asanet.org), founded in 1905, is a nonprofit membership association dedicated to serving sociologists in their work, advancing sociology as a science and profession, and promoting the contributions to and use of sociology by society. The Journal of Health and Social Behavior is a quarterly, peer-reviewed journal of the ASA.

The research article described above is available by request for members of the media. Contact Daniel Fowler, ASA’s Media Relations and Public Affairs Officer, at [email protected] or (202) 527-7885.




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3 thoughts on “Risk of marijuana’s ‘gateway effect’ overblown, new UNH research shows”

  1. $113 billion is spent on marijuana every year in the U.S., and because of the federal prohibition *every* dollar of it goes straight into the hands of criminals. Far from preventing people from using marijuana, the prohibition instead creates zero legal supply amid massive and unrelenting demand.According to the ONDCP, at least sixty percent of Mexican drug cartel money comes from selling marijuana in the U.S., they protect this revenue by brutally torturing, murdering and dismembering countless innocent people.If we can STOP people using marijuana then we need to do so NOW, but if we can’t then we need to legalize the production and sale of marijuana to adults with after-tax prices set too low for the cartels to match. One way or the other, we have to force the cartels out of the marijuana market and eliminate their highly lucrative marijuana incomes – no business can withstand the loss of sixty percent of its revenue!To date, the cartels have amassed more than 100,000 “foot soldiers” and operate in 230 U.S. cities, and Arizona police are now conceding that parts of their state are under cartel control. The longer the cartels are allowed to exploit the prohibition the more powerful they’re going to get and the more our own personal security will be put in jeopardy.

  2. This finding has been published and republished for decades. Marijuana is the official demon drug for law enforcment since it is so easy to detect allowing for the illusion that something is being done about the drug problem.

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