Intelligence Quotient Decline Following Frequent or Dependent Cannabis Use in Adolescence: A Systematic Review and Meta-Analysis of Longitudinal Studies

2020 ◽  
Author(s):  
Emmet Power ◽  
Sophie Sabherwal ◽  
Colm Healy ◽  
Aisling O'Neill ◽  
David Cotter ◽  
...  
Keyword(s):  
Systematic Review ◽  
Longitudinal Studies ◽  
Intelligence Quotient ◽  
Meta Analysis ◽  
Cannabis Use

scholarly journals Intelligence quotient decline following frequent or dependent cannabis use in youth: a systematic review and meta-analysis of longitudinal studies

2021 ◽  
Vol 51 (2) ◽  
pp. 194-200
Author(s):  
Emmet Power ◽  
Sophie Sabherwal ◽  
Colm Healy ◽  
Aisling O’ Neill ◽  
David Cotter ◽  
...  
Keyword(s):  
Systematic Review ◽  
Intelligence Quotient ◽  
Meta Analysis ◽  
Cannabis Use ◽  
Treatment Seeking ◽  
Cross Sectional ◽  
Statistical Heterogeneity ◽  
Meta Analyses ◽  
Summary Data

AbstractPrevious systematic reviews and meta-analyses of cross-sectional data assessing the effect of cannabis on cognitive functioning and intelligence show inconsistent results. We hypothesized that frequent and dependent cannabis use in youth would be associated with Intelligence Quotient (IQ) decline. This study is a systematic review and meta-analysis. We searched Embase, PubMed and PsychInfo from inception to 24 January 2020. We included studies with non-treatment seeking samples and pre- and post-exposure measures of IQ. We requested data from authors if summary data was not available from published work. We preregistered our review with PROSPERO (ID no. CRD42019125624). We found seven cohort studies including 808 cases and 5308 controls. We found a significant effect for the association between frequent or dependent cannabis use in youth and IQ change, Cohen's d = −0.132 (95% CI −0.198 to −0.066) p < 0.001. Statistical heterogeneity between studies was also low at I2 = 0.2%. Study quality was moderate to high. This translates to an average decline of approximately 2 IQ points following exposure to cannabis in youth. Future studies should have longer periods of follow up to assess the magnitude of developmental impact.

892 – The association between cannabis use and depression: a systematic review and meta-analysis of longitudinal studies

2013 ◽  
Vol 28 ◽  
pp. 1 ◽  
Author(s):  
S. Lev-Ran ◽  
M. Roerecke ◽  
B. Le Foll ◽  
T. George ◽  
K. McKenzie ◽  
...  
Keyword(s):  
Systematic Review ◽  
Longitudinal Studies ◽  
Meta Analysis ◽  
Cannabis Use

A systematic review of longitudinal studies investigating the impact of cannabis use in patients with psychotic disorders

2021 ◽  
Author(s):  
Maria Athanassiou ◽  
Alexandre Dumais ◽  
Gismonde Gnanhoue ◽  
Amal Abdel-Baki ◽  
Didier Jutras-Aswad ◽  
...  
Keyword(s):  
Systematic Review ◽  
Longitudinal Studies ◽  
Psychotic Disorders ◽  
Cannabis Use ◽  
The Impact

Feedback-Seeking Behavior in Organizations: A Meta-Analysis and Systematical Review of Longitudinal Studies

2021 ◽  
Vol 24 ◽  
Author(s):  
Alexandra Bălăceanu ◽  
Delia Vîrgă ◽  
Laurentiu Maricuțoiu
Keyword(s):  
Systematic Review ◽  
Longitudinal Studies ◽  
Structural Equation ◽  
Longitudinal Design ◽  
Meta Analysis ◽  
Equation Modeling ◽  
Personal Resources ◽  
Feedback Seeking ◽  
Eligibility Criteria ◽  
Seeking Behavior

Abstract Based on the Job Demands-Resources theory, this meta‐analysis investigates the role of resources in predicting feedback-seeking behavior (FSB) over time. We also examine the relationship between FSB and its outcomes from a systematic review perspective. The eligibility criteria were: (a) to measure feedback-seeking behavior, (b) to have a longitudinal design, and (c) to have employees as target groups. Thirteen studies met these criteria (Ntotal= 1,527). We combined the meta-analysis procedures and structural equation modeling (metaSEM) and used the systematic review. The methodological quality of the available longitudinal studies is assessed. Our findings indicated that job resources predict future feedback-seeking behavior and between feedback-seeking behavior and personal resources is significant relationship. More research is needed to clarify the reciprocal relationships between personal resources and feedback-seeking behavior and the influences of feedback-seeking behavior on performance.

Intelligence Quotient Outcome Following Epilepsy Surgery in Pediatric Age – A Systematic Review and Meta-Analysis

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Alferes AR ◽  
◽  
Oliveiros B ◽  
Pereira C ◽  
◽  
...  
Keyword(s):  
Systematic Review ◽  
Intelligence Quotient ◽  
Meta Analysis ◽  
Full Scale ◽  
Cochrane Library ◽  
Pediatric Epilepsy ◽  
Pediatric Age ◽  
Meta Regression ◽  
The Cochrane Library ◽  
Intelligence Development

There is a deep-rooted correlation between refractory epilepsy in pediatric age and intelligence development. However, little is known about whether surgical procedures used in pediatric epilepsy treatment can affect Intelligence Quotient (IQ) or not. Factors that might influence postoperative IQ are also a matter of study in several articles. To tackle these issues, a systematic review with meta-analysis was conducted with the terms “epilepsy”, “epileptic”, “surgery”, “surgical”, “Wechsler Scale” and “intelligence tests” in PubMed, the Cochrane Library, EMBASE and Clinical Trials.gov. A descriptive data synthesis was carried out to address each of the objectives and then a metaanalysis using a random effects model was conducted. A meta-regression was performed to ascertain possible factors that could influence postoperative IQ. The meta-analysis of the studies included found a mean difference between postoperative and preoperative full-scale IQ values of 1.014 standardized points (p < 0.001). Among all the articles regarding curative surgeries, only three reported an overall significant improvement in IQ after surgery. Regarding palliative procedures, both studies with anterior corpus callosotomy reported a significant improvement in full-scale IQ values two years after surgery. The meta-regression performed did not find any predictors of change in full-scale IQ.

Mental disorders as risk factors for suicidal behavior in young people: A meta-analysis and systematic review of longitudinal studies

2019 ◽  
Vol 245 ◽  
pp. 152-162 ◽  
Author(s):  
Margalida Gili ◽  
Pere Castellví ◽  
Margalida Vives ◽  
Alejandro de la Torre-Luque ◽  
José Almenara ◽  
...  
Keyword(s):  
Risk Factors ◽  
Systematic Review ◽  
Young People ◽  
Mental Disorders ◽  
Longitudinal Studies ◽  
Suicidal Behavior ◽  
Meta Analysis
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