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In late age , illegal marijuana use has risen faster in states that have legalizedmedical marijuanathan in states without such laws , a new subject field finds .
In addition , the percentage of people with " marijuanause disorders " — people who practice the drug in insalubrious ways , or abuse it — has also increase at a higher charge per unit in these province , according to the bailiwick .
Although medical marihuana laws may profit some people , changes to country laws also may have negative upshot for public wellness , the researcher , led by Deborah Hasin , a professor of epidemiology at Columbia University in New York City , spell in the study . Marijuana may , for exercise , serve cancer patientswith nuisance and sickness .
The research worker looked at data point from three time menses : 1991 to 1992 , when no state allowed marijuana use for aesculapian reasons ; 2001 to 2002 , when six DoS had medical marijuana laws ; and 2012 to 2013 , when 15 states had medical marijuana laws . [ Marijuana Legalization in the US ( Map ) ]
As of November 2016 , a total of 28 states have passed aesculapian marijuana laws , grant to the study , publish today ( April 26 ) in the journalJAMA Psychiatry .
data point on mass ’s marijuana habit and rates of marijuana use disorders come from national view from the three clock time periods included , the study said . closely 120,000 people in 39 states were included in these resume , according to the cogitation .
Over the course of the survey flow , the rates of illegal marijuana use increased in all 39 state included in the study . In the state of matter that never passed aesculapian marijuana law , the rate of illegal use of the drug rose from 4.5 percentage to 6.7 percent — an increment of 2.2 percentage point . In country that did come about medical marijuana laws , the rates of illegal use of goods and services rose from 5.6 percent to 9.2 percent — an increment of 3.6 percentage full point . In other words , the rate of illegal marijuana role increased more quickly in states with aesculapian marijuana laws , the researchers said .
Similarly , the rate ofmarijuana usedisorders also increased more quickly over the study geological period in states that had go along aesculapian marijuana practice of law than in states that had not . In Department of State without aesculapian marijuana jurisprudence , the rate of marijuana use disorders uprise from 1.3 percent to 2.3 percent — an increase of 1 percentage point . In compare , the rates of marijuana use disorders in states with medical marijuana laws rose from 1.5 pct to 3.1 percent — an increase of 1.6 percentage points .
The research worker noted that two country , California andColorado , stood out for their higher rate of illegal marijuana use . For example , between 2001 - 2002 to 2012 - 2013 , the rates of illegal marijuana enjoyment increased by 5.3 percentage points in California and 7 percentage point in Colorado , the investigator witness . Marijuana has since been legalized for recreational use in both Colorado and California .
They also note that the rates of illegal marijuana economic consumption increased more sharply in res publica that passed medical ganja laws after 2002 - 2003 than in states that lapse the law before those year , with the elision of California . [ 7 Ways Marijuana May move the Brain ]
However , the study had several limitations , the researchers note . For example , the survey participants account their own cannabis use , which could have led to inaccuracy . In addition , asmarijuana use became more vernacular , people might have been more outgoing about reporting their use of the drug , which , in turn , might have kick in to the sharper increase between 2002 - 2003 and 2012 - 2013 . In other words , in the early resume , people might not have allow in to using marijuana .
More studies are needed to help explicate why medical marijuana laws may increase the illegal use of the drug , the research worker said . Some possible explanation admit an increased perception that marijuana is secure when a medical marijuana police is passed , as well as increase handiness of the drug , the researchers wrote .
primitively published onLive Science .
