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Background and Aims
To estimate during pregnancy correlations between frequency of self‐reported use of marijuana and quantified marijuana metabolite in biospecimens including urine, sera and umbilical cord homogenate.
Design
Prospective cohort.
Setting
Two urban hospitals in Colorado with legal recreational and medicinal marijuana.
Participants
Pregnant women (<16 weeks gestation) self‐reporting...
Aims
To measure the prospective relationship between smoking trajectories from adolescence to young adulthood and mental health in later adulthood and test whether this relationship was mediated by concurrent co‐use of alcohol and marijuana.
Design
Longitudinal study using data drawn from rounds 1 to 18 of the National Longitudinal Survey of Youth 1997 (NLSY97), a nationally representative cohort...
Aims
To estimate the impact of recreational and medical cannabis laws (RCL, MCL) on the use of cannabis and cigarettes in the United States.
Design
A difference‐in‐difference approach was applied to data from the 2004–17 National Survey on Drug Use and Health (NSDUH).
Setting
United States.
Participants
Nationally representative cross‐sectional survey of Americans aged 12 years and older (combined...
Background and aims
Cannabis and alcohol are frequently detected in fatal and injury motor vehicle crashes. While epidemiological meta‐analyses of cannabis and alcohol have found associations with an increase in crash risk, convergent evidence from driving performance measures is insufficiently quantitatively characterized. Our objectives were to quantify the magnitude of the effect of cannabis and...
Aims
To evaluate the feasibility and validity of a new method of quantifying cannabis flower use, integrating the amount of cannabis flower smoked, and the potency of the cannabis flower.
Design
Ecological momentary assessment (EMA) for 14 days.
Setting
Participants' daily lives in Columbia, Missouri, USA.
Participants
A total of 50 community participants, who were regular cannabis flower smokers...
Background and aim
In Uruguay, residents age 18 and older seeking legal cannabis must register with the government and choose one of three supply mechanisms: self‐cultivation, non‐profit cannabis clubs or pharmacies. This is the first paper to measure the association between type of legal cannabis supply mechanism and traffic crashes involving injuries.
Design
Ecological study using ordinary least...
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