Christian Hakulinen1, Mirka Hintsanen1,2, Marcus R Munafò3, Marianna Virtanen4, Mika Kivimäki5,6, George David Batty5,7,8, Markus Jokela1. 1. Institute of Behavioural Sciences, University of Helsinki, Finland. 2. Unit of Psychology, Faculty of Education, University of Oulu, Finland. 3. MRC Integrative Epidemiology Unit, UK Centre for Tobacco and Alcohol Studies, and School of Experimental Psychology, University of Bristol, UK. 4. Finnish Institute of Occupational Health, Helsinki, Finland. 5. Department of Epidemiology and Public Health, University College London, UK. 6. Department of Public Health, Faculty of Medicine, University of Helsinki, Finland. 7. Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, UK. 8. Alzheimer Scotland Dementia Research Centre, University of Edinburgh, UK.
Abstract
AIMS: To investigate cross-sectional and longitudinal associations between personality and smoking, and test whether socio-demographic factors modify these associations. DESIGN: Cross-sectional and longitudinal individual-participant meta-analysis. SETTING: Nine cohort studies from Australia, Germany, the United Kingdom and the United States. PARTICIPANTS: A total of 79 757 men and women (mean age = 50.8 years). MEASUREMENTS: Personality traits of the five-factor model (extraversion, neuroticism, agreeableness, conscientiousness and openness to experience) were used as exposures. Outcomes were current smoking status (current smoker, ex-smoker and never smoker), smoking initiation, smoking relapse and smoking cessation. Associations between personality and smoking were modelled using logistic and multinomial logistic regression, and study-specific findings were combined using random-effect meta-analysis. FINDINGS: Current smoking was associated with higher extraversion [odds ratio per 1 standard deviation increase in the score: 1.16; 95% confidence interval (CI) = 1.08-1.24], higher neuroticism (1.19; 95% CI = 1.13-1.26) and lower conscientiousness (95% CI = 0.88; 0.83-0.94). Among non-smokers, smoking initiation during the follow-up period was predicted prospectively by higher extraversion (1.22; 95% CI = 1.04-1.43) and lower conscientiousness (0.80; 95% CI = 0.68-0.93), whereas higher neuroticism (1.16; 95% CI = 1.04-1.30) predicted smoking relapse among ex-smokers. Among smokers, smoking cessation was negatively associated with neuroticism (0.91; 95% CI = 0.87-0.96). Socio-demographic variables did not appear to modify the associations between personality and smoking. CONCLUSIONS: Adult smokers have higher extraversion, higher neuroticism and lower conscientiousness personality scores than non-smokers. Initiation into smoking is associated positively with higher extraversion and lower conscientiousness, while relapse to smoking among ex-smokers is associated with higher neuroticism.
AIMS: To investigate cross-sectional and longitudinal associations between personality and smoking, and test whether socio-demographic factors modify these associations. DESIGN: Cross-sectional and longitudinal individual-participant meta-analysis. SETTING: Nine cohort studies from Australia, Germany, the United Kingdom and the United States. PARTICIPANTS: A total of 79 757 men and women (mean age = 50.8 years). MEASUREMENTS: Personality traits of the five-factor model (extraversion, neuroticism, agreeableness, conscientiousness and openness to experience) were used as exposures. Outcomes were current smoking status (current smoker, ex-smoker and never smoker), smoking initiation, smoking relapse and smoking cessation. Associations between personality and smoking were modelled using logistic and multinomial logistic regression, and study-specific findings were combined using random-effect meta-analysis. FINDINGS: Current smoking was associated with higher extraversion [odds ratio per 1 standard deviation increase in the score: 1.16; 95% confidence interval (CI) = 1.08-1.24], higher neuroticism (1.19; 95% CI = 1.13-1.26) and lower conscientiousness (95% CI = 0.88; 0.83-0.94). Among non-smokers, smoking initiation during the follow-up period was predicted prospectively by higher extraversion (1.22; 95% CI = 1.04-1.43) and lower conscientiousness (0.80; 95% CI = 0.68-0.93), whereas higher neuroticism (1.16; 95% CI = 1.04-1.30) predicted smoking relapse among ex-smokers. Among smokers, smoking cessation was negatively associated with neuroticism (0.91; 95% CI = 0.87-0.96). Socio-demographic variables did not appear to modify the associations between personality and smoking. CONCLUSIONS: Adult smokers have higher extraversion, higher neuroticism and lower conscientiousness personality scores than non-smokers. Initiation into smoking is associated positively with higher extraversion and lower conscientiousness, while relapse to smoking among ex-smokers is associated with higher neuroticism.
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