Cargando…
Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study
There is much debate about the impact of adolescent cannabis use on intellectual and educational outcomes. We investigated associations between adolescent cannabis use and IQ and educational attainment in a sample of 2235 teenagers from the Avon Longitudinal Study of Parents and Children. By the age...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4724860/ https://www.ncbi.nlm.nih.gov/pubmed/26739345 http://dx.doi.org/10.1177/0269881115622241 |
_version_ | 1782411597785858048 |
---|---|
author | Mokrysz, C Landy, R Gage, SH Munafò, MR Roiser, JP Curran, HV |
author_facet | Mokrysz, C Landy, R Gage, SH Munafò, MR Roiser, JP Curran, HV |
author_sort | Mokrysz, C |
collection | PubMed |
description | There is much debate about the impact of adolescent cannabis use on intellectual and educational outcomes. We investigated associations between adolescent cannabis use and IQ and educational attainment in a sample of 2235 teenagers from the Avon Longitudinal Study of Parents and Children. By the age of 15, 24% reported having tried cannabis at least once. A series of nested linear regressions was employed, adjusted hierarchically by pre-exposure ability and potential confounds (e.g. cigarette and alcohol use, childhood mental-health symptoms and behavioural problems), to test the relationships between cumulative cannabis use and IQ at the age of 15 and educational performance at the age of 16. After full adjustment, those who had used cannabis ⩾50 times did not differ from never-users on either IQ or educational performance. Adjusting for group differences in cigarette smoking dramatically attenuated the associations between cannabis use and both outcomes, and further analyses demonstrated robust associations between cigarette use and educational outcomes, even with cannabis users excluded. These findings suggest that adolescent cannabis use is not associated with IQ or educational performance once adjustment is made for potential confounds, in particular adolescent cigarette use. Modest cannabis use in teenagers may have less cognitive impact than epidemiological surveys of older cohorts have previously suggested. |
format | Online Article Text |
id | pubmed-4724860 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-47248602016-02-08 Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study Mokrysz, C Landy, R Gage, SH Munafò, MR Roiser, JP Curran, HV J Psychopharmacol Original Papers There is much debate about the impact of adolescent cannabis use on intellectual and educational outcomes. We investigated associations between adolescent cannabis use and IQ and educational attainment in a sample of 2235 teenagers from the Avon Longitudinal Study of Parents and Children. By the age of 15, 24% reported having tried cannabis at least once. A series of nested linear regressions was employed, adjusted hierarchically by pre-exposure ability and potential confounds (e.g. cigarette and alcohol use, childhood mental-health symptoms and behavioural problems), to test the relationships between cumulative cannabis use and IQ at the age of 15 and educational performance at the age of 16. After full adjustment, those who had used cannabis ⩾50 times did not differ from never-users on either IQ or educational performance. Adjusting for group differences in cigarette smoking dramatically attenuated the associations between cannabis use and both outcomes, and further analyses demonstrated robust associations between cigarette use and educational outcomes, even with cannabis users excluded. These findings suggest that adolescent cannabis use is not associated with IQ or educational performance once adjustment is made for potential confounds, in particular adolescent cigarette use. Modest cannabis use in teenagers may have less cognitive impact than epidemiological surveys of older cohorts have previously suggested. SAGE Publications 2016-02 /pmc/articles/PMC4724860/ /pubmed/26739345 http://dx.doi.org/10.1177/0269881115622241 Text en © The Author(s) 2016 http://creativecommons.org/licenses/by/3.0/ This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage). |
spellingShingle | Original Papers Mokrysz, C Landy, R Gage, SH Munafò, MR Roiser, JP Curran, HV Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title | Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title_full | Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title_fullStr | Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title_full_unstemmed | Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title_short | Are IQ and educational outcomes in teenagers related to their cannabis use? A prospective cohort study |
title_sort | are iq and educational outcomes in teenagers related to their cannabis use? a prospective cohort study |
topic | Original Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4724860/ https://www.ncbi.nlm.nih.gov/pubmed/26739345 http://dx.doi.org/10.1177/0269881115622241 |
work_keys_str_mv | AT mokryszc areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy AT landyr areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy AT gagesh areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy AT munafomr areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy AT roiserjp areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy AT curranhv areiqandeducationaloutcomesinteenagersrelatedtotheircannabisuseaprospectivecohortstudy |