Bretteville-Jensen Anne Line, Burdzovic Andreas Jasmina
Department of Alcohol, Tobacco, and Drugs, Norwegian Institute of Public Health, Oslo, Norway
Department of Alcohol, Tobacco, and Drugs, Norwegian Institute of Public Health, Oslo, Norway.
BMJ Open. 2025 Jul 22;15(7):e092475. doi: 10.1136/bmjopen-2024-092475.
CANN2021 is a nationwide cohort of Norwegian high school students created with the aim of addressing emerging issues in epidemiology of cannabis use through the initial surveillance and examination of its correlates, causes and consequences.
Between 25 February 2021 and 10 April 2021, a core baseline sample of 3490 students (48% boys; 11th grade 35.5%, 12th grade 31.2%, 13th grade 33.3%) from 34 high schools in Norway anonymously completed comprehensive e-surveys assessing their cannabis-related involvement and experiences. A total of 1510 (43.3%) participants (45.8% boys; 11th grade 28.9%, 12th grade 31.1%, 13th grade 40.0%) provided identifying information and consented to administrative contact entailing individual-level linkages of their survey responses to their health and census data as recorded in various national registries since 2010, thus establishing the CANN2021 registry-linkages cohort.
The core baseline sample (N=3490) was largely representative of the Norwegian high school youth between the ages of 17 and 19 years, and as such of relevance to national surveillance needs. One in five (20.3%) reported having used cannabis at least once during their lifetime; of these, 40.9% consented to registry linkages.
E-survey data from the registry cohort will be linked at the individual level to health and administrative registries such as the Norwegian Patient Registry, Education, Crime, Income and Population Registry in 2025, 2029 and 2031. The retrospective and prospective linkages of baseline e-surveys with registry data can thus be used to address a range of epidemiological and public health questions, including examination of temporal associations between various types of early cannabis involvement and putative risk and protective factors, and subsequent health and social outcomes.
CANN2021是挪威高中生的全国性队列研究，旨在通过对大麻使用的相关性、成因和后果进行初步监测与调查，来解决大麻使用流行病学中出现的问题。
在2021年2月25日至2021年4月10日期间，来自挪威34所高中的3490名学生（48%为男生；11年级占35.5%，12年级占31.2%，13年级占33.3%）组成的核心基线样本匿名完成了全面的电子调查，评估他们与大麻相关的参与情况和经历。共有1510名（43.3%）参与者（45.8%为男生；11年级占28.9%，12年级占31.1%，13年级占40.0%）提供了身份识别信息，并同意进行行政联系，即自2010年以来将他们的调查回复与各种国家登记处记录的健康和人口普查数据进行个人层面的关联，从而建立了CANN2021登记关联队列。
核心基线样本（N = 3490）在很大程度上代表了17至19岁的挪威高中青年，因此与国家监测需求相关。五分之一（20.3%）的人报告称一生中至少使用过大麻一次；其中，40.9%同意进行登记关联。
登记队列的电子调查数据将于2025年、2029年和2031年在个人层面与健康和行政登记处（如挪威患者登记处、教育、犯罪、收入和人口登记处）进行关联。因此，基线电子调查与登记数据的回顾性和前瞻性关联可用于解决一系列流行病学和公共卫生问题，包括研究各类早期大麻使用与假定的风险和保护因素之间的时间关联，以及随后的健康和社会结果。
