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Body mass index, body dissatisfaction and adolescent smoking initiation

Howe, LJ; Trela-Larsen, L; Taylor, M; Heron, J; Munafò, MR; Taylor, AE; (2017) Body mass index, body dissatisfaction and adolescent smoking initiation. Drug and Alcohol Dependence , 178 pp. 143-149. 10.1016/j.drugalcdep.2017.04.008. Green open access

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BACKGROUND: Smoking influences body weight, but there is little evidence as to whether body mass index (BMI) and body dissatisfaction increase smoking initiation in adolescents. METHODS: We evaluated the association between measured BMI, body dissatisfaction and latent classes of smoking initiation (never smokers, experimenters, late onset regular smokers, early onset regular smokers) in the Avon Longitudinal Study of Parents and Children. In observational analyses we used BMI (N=3754) and body dissatisfaction at age 10.5 years (N=3349). In Mendelian randomisation (MR) analysis, we used a BMI genetic risk score of 76 single nucleotide polymorphisms (N=4017). RESULTS: In females, higher BMI was associated with increased odds of early onset regular smoking (OR: 1.11, 95% CI: 1.04, 1.18) compared to being a never smoker, but not clearly associated with experimenting with smoking (OR: 1.04, 95% CI: 0.99, 1.10) or late onset regular smoking (OR: 1.01, 95% CI: 0.94, 1.09). No clear evidence was found for associations between BMI and smoking initiation classes in males (p-value for sex interaction≤0.001). Body dissatisfaction was associated with increased odds of late-onset regular smoking (OR: 1.71, 95% CI: 1.32, 1.99) in males and females combined (P-value for sex interaction=0.32). There was no clear evidence for an association between the BMI genetic risk score and smoking latent classes in males or females but estimates were imprecise. CONCLUSIONS: BMI in females and body dissatisfaction in males and females are associated with increased odds of smoking initiation, highlighting these as potentially important factors for consideration in smoking prevention strategies.

Type: Article
Title: Body mass index, body dissatisfaction and adolescent smoking initiation
Location: Ireland
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.drugalcdep.2017.04.008
Publisher version: http://doi.org/10.1016/j.drugalcdep.2017.04.008
Language: English
Additional information: Copyright © 2017 The Authors. Published by Elsevier Ireland Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Keywords: Tobacco, Body mass index, Body dissatisfaction, Mendelian randomization, ALSPAC
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science
URI: https://discovery.ucl.ac.uk/id/eprint/10050767
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