More US Adults Are Using Marijuana as They Don't Think It's Harmful

AN INCREASING NUMBER of US adults are using marijuana, as fewer people perceive the drug as harmful, according to a survey of over 500,000 people.

The study analysed data from 596,500 adults who took part in the annual US National Survey on Drug Use and Health from 2002 to 2014.

Marijuana use (defined as having used marijuana in the previous year) increased from 10.4% in 2002 to 13.3% in 2014. The proportion of adults who first started using marijuana in the previous year increased from 0.7% in 2002 to 1.1% in 2014.

The prevalence of daily or near daily use (defined as people who use marijuana, on average, five days or more per week) increased from 1.9% to 3.5% over the same period.

Extrapolating the findings in line with the US population, the authors estimate that the number of adults who first used marijuana increased from 823,000 in 2002 to...

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