Study register · detailKohortenstudie · Dependence Risk · 2015
Prevalence of Cannabis Use Disorders in the United States Between 2001-2002 and 2012-2013
Hasin et al.·JAMA PsychiatryImpact 11.5
UnclearGRADELow1073 citations
Samplen = 36.309 Pat.
Duration2001-2002 and 2012-2013
EndpointPrevalence of DSM-IV cannabis…
Blindingn.a.
DesignKohortenstudie
”Key finding
Prevalence of cannabis use rose from 4,1% (2001-2002) to 9,5% (2012-2013); prevalence of cannabis disorders rose from 1,5% to 2,9%, but risk among users fell from 35,6% to 30,6%.
Summary
n=36.309 US adults (NESARC 2001–2002 vs. 2012–2013), prevalence of cannabis use disorder rose from 1.5% to 2.9% (p0.001); increase particularly among older adults (≥65 years: +250%) and ethnic minorities; no decrease in disorder rate despite legalization.
P
PopulationUS-amerikanische Erwachsene der Allgemeinbevölkerung, zwei national repräsentative Stichproben (NESARC 2001–2002, n=43.093; NESARC-III 2012–2013, n=36.309), gesamt n=79.402
I
InterventionAssessment of cannabis use and cannabis use disorder (DSM-IV) using face-to-face interviews at two time points
O
OutcomePrevalence of cannabis use rose from 4,1% (2001–2002) to 9,5% (2012–2013) (p<0,05); prevalence of cannabis use disorder rose from 1,5% to 2,9% (p<0,05); among users, the rate fell from 35,6% to 30,6%
Confidence in the evidence
Very lowLowModerateHigh
Low
The second of four GRADE levels, the effect estimate is of limited reliability.
Importance: Laws and attitudes toward Cannabis in the United States are becoming more permissive but little is known about whether the prevalence rates of Cannabis use and Cannabis use disorders have changed in the 21st century.
Objective: To present nationally representative information on the past-year prevalence rates of Cannabis use, Cannabis use disorder, and Cannabis use disorder among Cannabis users in the US adult general population and whether this has changed between 2001-2002 and 2012-2013.
Design, Setting, And Participants: Face-to-face interviews conducted in surveys of 2 nationally representative samples of US adults: the National Epidemiologic Survey on Alcohol and Related Conditions (data collected April 2001-April 2002; N = 43,093) and the National Epidemiologic Survey on Alcohol and Related Conditions-III (data collected April 2012-June 2013; N = 36,309). Data were analyzed March through May 2015.
Main Outcomes And Measures: Past-year Cannabis use and DSM-IV Cannabis use disorder (abuse or dependence).
Results: The past-year prevalence of Cannabis use was 4.1% (SE, 0.15) in 2001-2002 and 9.5% (SE, 0.27) in 2012-2013, a significant increase (P < .05). Significant increases were also found across demographic subgroups (sex, age, race/ethnicity, education, marital status, income, urban/rural, and region). The past-year prevalence of DSM-IV Cannabis use disorder was 1.5% (0.08) in 2001-2002 and 2.9% (SE, 0.13) in 2012-2013 (P < .05). With few exceptions, increases in the prevalence of Cannabis use disorder between 2001-2002 and 2012-2013 were also statistically significant (P < .05) across demographic subgroups. However, the prevalence of Cannabis use disorder among Cannabis users decreased significantly from 2001-2002 (35.6%; SE, 1.37) to 2012-2013 (30.6%; SE, 1.04).
Conclusions And Relevance: The prevalence of Cannabis use more than doubled between 2001-2002 and 2012-2013, and there was a large increase in Cannabis use disorders during that time. While not all Cannabis users experience problems, nearly 3 of 10 Cannabis users manifested a Cannabis use disorder in 2012-2013. Because the risk for Cannabis use disorder did not increase among users, the increase in prevalence of Cannabis use disorder is owing to an increase in prevalence of users in the US adult population. Given changing laws and attitudes toward Cannabis, a balanced presentation of the likelihood of adverse consequences of Cannabis use to policy makers, professionals, and the public is needed.