Valen Anja, Bogstrand Stig Tore, Vindenes Vigdis, Gjerde Hallvard
a Department of Forensic Sciences , Oslo University Hospital , Oslo , Norway.
b Institute of Clinical Medicine , University of Oslo , Oslo , Norway.
Traffic Inj Prev. 2017 Nov 17;18(8):801-806. doi: 10.1080/15389588.2017.1321114. Epub 2017 Apr 27.
The availability of cannabis in Norway seems to have increased according to seizures by customs and police. On the other hand, national population surveys have not found any increase in self-reported use of cannabis. This investigation aimed at studying trends in cannabis use among suspected drug-impaired drivers apprehended by the police in Norway.
A time series observational study of cannabis use among all drivers tested for drugs during 2000-2015 was performed. Descriptive analyses of trends in frequencies and combined use of cannabis with other drugs or alcohol for different age groups and gender were conducted.
Tetrahydrocannabinol (THC) is the main psychoactive substance in cannabis and was detected in blood samples from 18,767 suspected drug-impaired drivers. The annual number of THC findings increased during the years 2000-2015 for all age groups. For cannabis-only users, young drivers aged 20-29 years dominated during the whole period, whereas for multidrug-cannabis users the median age increased steadily during 2000-2015. After 2009, the annual increase in THC findings escalated; THC-only findings increased the most.
Increasing numbers of THC-positive drivers were found among all age groups and genders; the strongest trend was observed between 2009-2015 for young drivers testing positive only for THC.
根据海关和警方的缉获量来看，挪威大麻的可得性似乎有所增加。另一方面，全国人口调查并未发现自我报告的大麻使用量有任何增加。本调查旨在研究挪威警方查获的涉嫌药物影响驾驶的司机中大麻使用的趋势。
对2000年至2015年期间所有接受毒品检测的司机的大麻使用情况进行了时间序列观察研究。对不同年龄组和性别的大麻使用频率趋势以及大麻与其他药物或酒精的联合使用情况进行了描述性分析。
四氢大麻酚（THC）是大麻中的主要精神活性物质，在18767名涉嫌药物影响驾驶的司机的血液样本中被检测到。2000年至2015年期间，所有年龄组的THC检测年度数量均有所增加。对于仅使用大麻的用户，20至29岁的年轻司机在整个时期占主导地位，而对于使用多种药物和大麻的用户，2000年至2015年期间年龄中位数稳步上升。2009年后，THC检测结果的年度增长加剧；仅THC检测结果增长最多。
在所有年龄组和性别中都发现了THC阳性司机的数量增加；在2009年至2015年期间，仅THC检测呈阳性的年轻司机的趋势最为明显。
