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In spite of the most stringent drug policies and punitive laws in the world, the United States also has the highest levels of lifetime illegal cocaine and marijuana use, according to a study of more than 54,000 people in 17 countries.
The United States also has the highest rate of lifetime tobacco use but comes in third in alcohol use, behind the Ukraine and Germany. The study, by Louisa Degenhardt of the University of New South Wales (Sydney, Australia) and colleagues, is based on the World Health Organization's Composite International Diagnostic Interview (CIDI).
The survey, which asked participants about their lifetime cocaine, marijuana, tobacco and alcohol use, found that 16.2% of people in the United States have used cocaine at some point during their lives. This rate was almost four times the rate of the second-place country, New Zealand, where 4.3% said they had tried cocaine.
The researchers also found that 42.4% of people in the United States reported marijuana use during their lifetime. New Zealand was second with 41.9%, but the two countries were far ahead of the other 15 in lifetime marijuana use.
"Drug use is related to income, but does not appear to be simply related to drug policy, since countries with more stringent policies towards illegal drug use did not have lower levels of such drug use than countries with more liberal policies," Degenhardt and her colleagues write.
"The United States, which has been driving much of the world's drug research and drug policy agenda, stands out with higher levels of use of alcohol, cocaine and cannabis, despite punitive illegal drug policies, as well as (in many U.S. states) a higher minimum legal alcohol drinking age than many comparable developed countries," the authors report.
"The Netherlands, with a less criminally punitive approach to cannabis use than the United States, has experienced lower levels of use, particularly among younger adults," the report says. "Clearly, by itself, a punitive policy towards possession and use accounts for limited variation in nation-level rates of illegal drug use."
Here are some of the other key findings of the study:
"There was greater drug involvement among younger than older adults in all countries, suggesting that drug use has and may continue to change over historical time," the authors write. "Interestingly, there was also evidence to suggest that male-female differences in risk of initiating drug use may be changing in more recent birth cohorts.
"This change was a consistent finding across countries, suggesting that a general shift may be occurring with respect to the traditional sex differences so often documented with drug use."
Source:
Degenhardt L, et al. (2008) "Toward a Global View of Alcohol, Tobacco, Cannabis, and Cocaine Use: Findings from the WHO World Mental Health Surveys." PLoS Medicine 1 July 2008
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