The Standard Joint Unit

Drug and Alcohol Dependence
Cristina Casajuana KögelAntoni Gual

Abstract

Reliable data on cannabis quantities is required to improve assessment of cannabis consumption for epidemiological analysis and clinical assessment, consequently a Standard Joint Unit (SJU) based on quantity of 9-Tetrahydrocannabinol (9-THC) has been established. Naturalistic study of a convenience sample recruited from February 2015-June 2016 in universities, leisure spaces, mental health services and cannabis clubs in Barcelona. Adults, reporting cannabis use in the last 60 days, without cognitive impairment or language barriers, answered a questionnaire on cannabis use and were asked to donate a joint to further determine their 9-THC and Cannabidiol (CBD) content. 492 participants donated 315 valid joints. Donators were on average 29 years old, mostly men (77%), single (75%), with at least secondary studies (73%) and in active employment (63%). Marijuana joints (N=232) contained a median of 6.56mg of 9-THC (Interquartile range-IQR=10,22) and 0.02mg of CBD (IQR=0.02); hashish joints (N=83) a median of 7.94mg of 9-THC (IQR=10,61) and 3.24mg of CBD (IQR=3.21). Participants rolled 4 joints per gram of cannabis and paid 5€ per gram (median values). Consistent 9-THC-content in joints lead to a SJU of 7mg of 9-THC, the integer numb...Continue Reading

Citations

Feb 28, 2019·Addiction Biology·Chrysanthi BlithikiotiMercedes Balcells-Oliveró
Feb 16, 2020·Brain Sciences·Sanne J van der SteurMatthijs G Bossong
Jan 2, 2020·Journal of Neural Transmission·Phil Skolnick, Roger Crystal
Jul 22, 2019·Journal of Clinical Medicine·Ivan HerrerosPaul Verschure
Sep 26, 2020·Drug and Alcohol Dependence·Russell C CallaghanStephen J Kish
Mar 3, 2020·Forensic Science International : Synergy·J Mørland, J G Bramness
Feb 18, 2021·Journal of Psychopharmacology·Anne K SchlagH Valerie Curran
Jun 22, 2020·Journal of Psychiatric Research·S MaderoM Balcells
Mar 28, 2021·The Science of the Total Environment·Lubertus BijlsmaJosé Benito Quintana
Apr 28, 2021·Scientific Reports·Zsuzsanna CzégényDezső Csupor
Aug 22, 2020·Current Opinion in Psychology·Emese KroonJanna Cousijn
Jun 8, 2021·Frontiers in Psychiatry·Hugo López-PelayoAntoni Gual
Aug 27, 2021·Frontiers in Psychiatry·Hugo López-PelayoMaria de Las Mercedes Balcells-Olivero

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