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Study: The ‘gateway drug’ is alcohol, not marijuana

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A study in the August edition of The Journal of School Health finds that the generations old theory of a “gateway drug” effect is in fact accurate for some drug users, but shifts the blame for those addicts’ escalating substance abuse away from marijuana and onto the most pervasive and socially accepted drug in American life: alcohol.

Using a nationally representative sample from the University of Michigan’s annual Monitoring the Future survey, the study blasts holes in drug war orthodoxy wide enough to drive a truck through, definitively proving that marijuana use is not the primary indicator of whether a person will move on to more dangerous substances.

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“By delaying the onset of alcohol initiation, rates of both licit substance abuse like tobacco and illicit substance use like marijuana and other drugs will be positively affected, and they’ll hopefully go down,” study co-author Adam E. Barry, an assistant professor at the University of Florida’s Department of Health Education & Behavior, told Raw Story in an exclusive interview.

While Barry’s study shows evidence that substance abuse behaviors can be predicted with a high degree of accuracy by examining a subject’s drug history, he believes that the persistent and misguided notion of marijuana as the primary gateway to more harmful substances went awry because its creators — who called it the “Stepping Stone Hypothesis” in the “Reefer Madness” era of the 1930s — fundamentally misread the data and failed to conduct an adequate follow-up.

“Some of these earlier iterations needed to be fleshed out,” Barry said. “That’s why we wanted to study this. The latest form of the gateway theory is that it begins with [marijuana] and moves on finally to what laypeople often call ‘harder drugs.’ As you can see from the findings of our study, it confirmed this gateway hypothesis, but it follows progression from licit substances, specifically alcohol, and moves on to illicit substances.”

“So, basically, if we know what someone says with regards to their alcohol use, then we should be able to predict what they respond to with other [drugs],” he explained. “Another way to say it is, if we know someone has done [the least prevalent drug] heroin, then we can assume they have tried all the others.”

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And while that standardized progression certainly doesn’t fit every single drug user, the study took that into account too. “There were a low enough number of errors that you are able to accurately predict [future substance abuse behavior]… with about 92 percent accuracy,” Barry said.

By comparing substance abuse rates between drinkers and non-drinkers, they ultimately found that seniors in high school who had consumed alcohol at least once in their lives “were 13 times more likely to use cigarettes, 16 times more likely to use marijuana and other narcotics, and 13 times more likely to use cocaine.”

Barry also noted that the rates of tobacco and marijuana use among all 12th grade high school students were virtually the same, confirming a report the Centers for Disease Control published in June, and an analysis Raw Story published in May.

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The study should give pause to anyone involved in youth drug awareness programs, as its findings suggest that making science-based alcohol education a top priority could actually turn the tide of the drug war — but only if lawmakers and leading educators decide to use that same science as a foundation for public policy and school curriculum.

“I think [these results] have to do with level of access children have to alcohol, and that alcohol is viewed as less harmful than some of these other substances,” Barry added.

That social misconception, largely driven by the sheer popularity of alcohol and the profits it generates for private industry, is diametrically opposed to the most current science available on drug harms. A study published in 2010 in the medical journal Lancet ranked alcohol as the most harmful drug of all, above heroin, crack, meth, cocaine and tobacco. Even more striking: The Lancet study found that harms to others near the user were more than double those of the second most harmful drug, heroin.

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In its last Youth Risk Behavior Survey, the CDC found (PDF) that about 71 percent of American students have had at least one alcoholic beverage in their lifetime, and almost 39 percent reported having at least one drink within the last 30 days.

“This is a time of budget tightening,” Barry concluded. “Many social services are being cut. If you take [our findings] and apply them to a school health setting, we believe that you are going to get the best bang for your buck by focusing on alcohol.”
——

Updated from a prior version to add CDC’s Youth Risk Behavior Survey and clarify that the study’s confirmed ‘gateway drug’ effect only pertains to students who reported abusing substances other than alcohol.

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… then let us make a small request. Like you, we here at Raw Story believe in the power of progressive journalism — and we’re investing in investigative reporting as other publications give it the ax. Raw Story readers power David Cay Johnston’s DCReport, which we've expanded to keep watch in Washington. We’ve exposed billionaire tax evasion and uncovered White House efforts to poison our water. We’ve revealed financial scams that prey on veterans, and efforts to harm workers exploited by abusive bosses. We’ve launched a weekly podcast, “We’ve Got Issues,” focused on issues, not tweets. Unlike other news sites, we’ve decided to make our original content free. But we need your support to do what we do.

Raw Story is independent. You won’t find mainstream media bias here. We’re not part of a conglomerate, or a project of venture capital bros. From unflinching coverage of racism, to revealing efforts to erode our rights, Raw Story will continue to expose hypocrisy and harm. Unhinged from corporate overlords, we fight to ensure no one is forgotten.

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