Journal article
Genetic variation in personality traits explains genetic overlap between borderline personality features and substance use disorders
Addiction, Vol.109(12), pp.2118-2127
2014
Abstract
Aims To examine the genetic overlap between borderline personality features (BPF) and substance use disorders (SUDs) and the extent to which variation in personality traits contributes to this covariance. Design Genetic struc- tural equation modelling was used to partition the variance in and covariance between personality traits, BPF and SUDs into additive genetic, shared and individual-specific environmental factors. Setting All participants were reg- istered with the Australian Twin Registry. Participants A total of 3127 Australian adult twins participated in the study. Measurements Diagnoses of DSM-IV alcohol and cannabis abuse/dependence (AAD; CAD) and nicotine dependence (ND) were derived via computer-assisted telephone interview. BPF and five-factor model personality traits were derived via self-report questionnaires. Findings Personality traits, BPF and substance use disorders were par- tially influenced by genetic factors with heritability estimates ranging from 0.38 (neuroticism; 95% confidence inter- val: 0.30-0.45) to 0.78 (CAD; 95% confidence interval: 0.67-0.86). Genetic and individual-specific environmental correlations between BPF and SUDs ranged from 0.33 to 0.56 (95% CI = 0.19-0.74) and 0.19-0.32 (95% CI = 0.06- 0.43), respectively. Overall, there was substantial support for genetic influences that were specific to AAD, ND and CAD (30.76-68.60%). Finally, genetic variation in personality traits was responsible for 11.46% (extraversion for CAD) to 59.30% (neuroticism for AAD) of the correlation between BPF and SUDs. Conclusions Both genetic and individual- specific environmental factors contribute to comorbidity between borderline personality features and substance use disorders. A substantial proportion of this comorbidity can be attributed to variation in normal personality traits, particularly neuroticism.
Details
- Title
- Genetic variation in personality traits explains genetic overlap between borderline personality features and substance use disorders
- Authors
- Lauren R Few (Author) - Washington University School of Medicine, United StatesJulia D Grant (Author) - Washington University School of Medicine, United StatesTimothy J Trull (Author) - University of Missouri, United StatesDixie J Statham (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringNicholas G Martin (Author) - Kings College London, United KingdomMichael T Lynskey (Author) - Kings College London, United KingdomArpana Agrawal (Author) - Washington University School of Medicine, United States
- Publication details
- Addiction, Vol.109(12), pp.2118-2127
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Date published
- 2014
- DOI
- 10.1111/add.12690
- ISSN
- 0965-2140
- Copyright note
- Copyright © 2014 Wiley-Blackwell Publishing Ltd. This is the accepted version of the following article: Few, L. R., Grant, J. D., Trull, T. J., Statham, D. J., Martin, N. G., Lynskey, M. T. and Agrawal, A. (2014), Genetic variation in personality traits explains genetic overlap between borderline personality features and substance use disorders. Addiction, 109: 2118-2127. doi:10.1111/add.12690, which has been published in final form at http://dx.doi.org/10.1111/add.12690
- Organisation Unit
- School of Social Sciences - Legacy; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99449917502621
- Output Type
- Journal article
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- Psychiatry
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