Abstract:
BACKGROUND:Few studies have tested the hypothesis that adolescent cannabis users show structural brain alterations in adulthood. The present study tested associations between prospectively-assessed trajectories of adolescent cannabis use and adult brain structure in a sample of boys followed to adulthood. METHODS:Data came from the Pittsburgh Youth Study - a longitudinal study of ˜1000 boys. Boys completed self-reports of cannabis use annually from age 13-19, and latent class growth analysis was used to identify different trajectories of adolescent cannabis use. Once adolescent cannabis trajectories were identified, boys were classified into their most likely cannabis trajectory. A subset of boys (n = 181) subsequently underwent structural neuroimaging in adulthood, when they were between 30-36 years old on average. For this subset, we grouped participants according to their classified adolescent cannabis trajectory and tested whether these groups showed differences in adult brain structure in 14 a priori regions of interest, including six subcortical (volume only: amygdala, hippocampus, nucleus accumbens, caudate, putamen, and pallidum) and eight cortical regions (volume and thickness: superior frontal gyrus; caudal and rostral middle frontal gyrus; inferior frontal gyrus, separated into pars opercularis, pars triangularis, and pars orbitalis; lateral and medial orbitofrontal gyrus). RESULTS:We identified four adolescent cannabis trajectories: non-users/infrequent users, desisters, escalators, and chronic-relatively frequent users. Boys in different trajectory subgroups did not differ on adult brain structure in any subcortical or cortical region of interest. CONCLUSIONS:Adolescent cannabis use is not associated with structural brain differences in adulthood.
journal_name
Drug Alcohol Dependjournal_title
Drug and alcohol dependenceauthors
Meier MH,Schriber RA,Beardslee J,Hanson J,Pardini Ddoi
10.1016/j.drugalcdep.2019.05.012subject
Has Abstractpub_date
2019-09-01 00:00:00pages
191-199eissn
0376-8716issn
1879-0046pii
S0376-8716(19)30235-2journal_volume
202pub_type
杂志文章abstract:BACKGROUND:While it has been demonstrated that smoking cigarettes in adolescence increases the likelihood of progressing to marijuana use, few studies have considered the reverse scenario in which early use of cannabis leads to greater tobacco smoking. METHODS:Participants (n=5963), who had never smoked cigarettes dai...
journal_title:Drug and alcohol dependence
pub_type: 杂志文章,多中心研究
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journal_title:Drug and alcohol dependence
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更新日期:2018-12-01 00:00:00
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更新日期:2019-10-01 00:00:00
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pub_type: 临床试验,杂志文章,随机对照试验
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