Cannabis 'tinny' houses in New Zealand: implications for the use and sale of cannabis and other illicit drugs in New Zealand.
OBJECTIVE
To examine the impact of the emergence of cannabis 'tinny' houses on the use and sale of cannabis and other illicit drugs in New Zealand.


METHODS
A national sample of 5800 people aged 13-45 years were interviewed about their drug use using a computer-assisted telephone interview (CATI) system as part of the 2001 National Drug Survey. A question on cannabis procurement was used to create two subgroups of cannabis buyers for further analysis: (i) 'tinny' house buyers--those who had purchased 'some', 'most' or 'all' of their cannabis from a 'tinny' house (n = 145) and (ii) personal market buyers--those who had purchased 'none' or 'hardly any' of their cannabis from a 'tinny' house (n = 342). The two groups of cannabis buyers were compared for a range of variables. ['Tinny' houses are residential properties converted for the 'supermarket' sale of cannabis and other illicit drugs to anyone who attends the premises with cash.]


RESULTS
Those purchasing cannabis from 'tinny' houses were significantly more likely than those purchasing cannabis from the personal market to smoke one joint or more on a typical occasion, to purchase cannabis weekly or more often, to purchase small weights of cannabis, to be sold lower quality cannabis than they paid for, to know their cannabis dealer sells other illicit drug types and to use high potency strains of cannabis. There was no significant difference between the 'tinny' house and personal market cannabis buyers with respect to the frequency of cannabis use, prices paid for the same weights of cannabis, levels of other victimization, levels of other drug use or levels of encouragement by cannabis sellers to purchase other drug types. Those purchasing cannabis from 'tinny' houses were more likely to be aged 15-17 years old and to be of Maori ethnicity than those purchasing cannabis from the personal market.


CONCLUSIONS
Cannabis 'tinny' houses attracted more adolescent and more Maori clientele. However, 'tinny' houses did not appear to be contributing to the spread of the use of other drug types either through the active marketing of other drugs or by having these drugs available for sale at these locations.
Wilkins
Chris
C
Centre for Social and Health Outcomes Research and Evaluation, Massey University, Auckland, New Zealand. c.wilkins@massey.ac.nz
Reilly
James L
JL
Casswell
Sally
S
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003132:Commerce; D005260:Female; D006801:Humans; D013287:Illicit Drugs / Q000600:supply & distribution*; D008297:Male; D002189:Marijuana Abuse / Q000453:epidemiology*; D008875:Middle Aged; D009520:New Zealand / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology*; D011795:Surveys and Questionnaires
D013287:Illicit Drugs