Donnelly N, Hall W, Christie P
National Drug and Alcohol Research Centre, University of New South Wales, Sydney.
Aust J Public Health. 1995 Jun;19(3):281-7. doi: 10.1111/j.1753-6405.1995.tb00444.x.
In 1987 the Cannabis Expiration Notice scheme decreased penalties for the personal use of cannabis in South Australia. Data from four National Campaign Against Drug Abuse (NCADA) household drug-use surveys covering the period 1985 to 1993 were analysed to measure the effect of the decriminalisation on cannabis use. The main outcomes used were the self-reported prevalence rates of having ever used cannabis and current weekly use. Logistic regression was used to control for the potentially confounding effects of age and sex. Other outcomes were rates of having ever been offered cannabis and willingness to use cannabis if offered it. Between 1985 and 1993 the adjusted prevalence rate of ever having used cannabis increased in South Australia from 26 per cent to 38 per cent. There were also significant increases in Victoria and Tasmania, and to a lesser extent in New South Wales. The increase in South Australia was not significantly greater than the average increase (P = 0.1). Adjusted rates of weekly use increased between 1988 and 1991 in South Australia, but did not change through 1993. Although the effect was in the direction of a greater increase in South Australia, this was not statistically significant when compared to increases in the rest of Australia (P = 0.07). The greatest increase in adjusted weekly use occurred in Tasmania between 1991 and 1993, from 2 per cent to 7 per cent. Although the NCADA survey data indicate that there were increases in cannabis use in South Australia in 1985-1993, they cannot be attributed to the effects of partial decriminalisation, because similar increases occurred in other states.
1987年，南澳大利亚州的大麻过期通知计划降低了对个人使用大麻的处罚。分析了1985年至1993年期间四次全国反药物滥用运动（NCADA）家庭药物使用调查的数据，以衡量大麻合法化对大麻使用的影响。主要结果采用的是自我报告的曾经使用过大麻的流行率和当前每周的使用率。使用逻辑回归来控制年龄和性别的潜在混杂效应。其他结果是曾经被提供过大麻的比率以及如果被提供大麻是否愿意使用的意愿。1985年至1993年期间，南澳大利亚州曾经使用过大麻的调整后流行率从26%上升到了38%。维多利亚州和塔斯马尼亚州也有显著上升，新南威尔士州的上升幅度较小。南澳大利亚州的上升幅度并不显著大于平均上升幅度（P = 0.1）。1988年至1991年期间，南澳大利亚州每周使用大麻的调整后比率有所上升，但在1993年全年没有变化。尽管这种影响的方向是南澳大利亚州的上升幅度更大，但与澳大利亚其他地区的上升幅度相比，这在统计学上并不显著（P = 0.07）。每周使用大麻的调整后比率上升幅度最大的是1991年至1993年期间的塔斯马尼亚州，从2%上升到了7%。尽管NCADA的调查数据表明1985 - 1993年期间南澳大利亚州的大麻使用有所增加，但这些增加不能归因于部分合法化的影响，因为其他州也出现了类似的增加。
