Document Type
Capstone Experience
Graduation Date
5-2023
Degree Name
Master of Public Health
Department
Biostatistics
First Committee Member
Hongying (Daisy) Dai
Second Committee Member
Carrie McAdam Marx
Third Committee Member
Fang Qiu
Abstract
Purpose: Tobacco product susceptibility is defined as the interest a person has to start smoking. Tobacco product initiation refers to whether a person has ever used tobacco products. We aim to understand and explain how genetic and environmental factors affect tobacco products' susceptibility and initiation in children. Methods: The classical twin model estimates three sources of variance: additive genetic (A), shared environmental (C), and unique environments (E). Each source of variance is latent and is calculated from the similarity in the correlations of twin pairs on a phenotype. The magnitude of difference in the correlation of a particular phenotype by zygosity is used to attribute additive genetic or shared environmental sources of variance. Data for this study were obtained from The Adolescent Brain Cognitive Development (ABCD) study. Results/Findings: A total of 884 twin pairs with study variables data were included in the present analyses. We estimate how much the variation in a phenotype is due to additive genetic effects (A), the common environment (C), and the unique, random environment (E) by SAS software. Tobacco products' susceptibility is primarily influenced by environmental factors, especially one’s unique factors (C2=37%, pConclusion: This study suggests that environmental factors, incredibly unique environments, impact tobacco product susceptibility, and there is an additive genetic liability combined with environmental factors that can explain tobacco product initiation at an early age. This result advocates intervention strategies focusing on the unique environment to decrease children’s smoking susceptibility and calls for more studies on the genetic components of smoking initiation.
Recommended Citation
Liu, Yadi, "A Twin Study of Genetic Heritage and Environmental Influences on Tobacco Susceptibility and Initiation on Early Age" (2023). Capstone Experience. 236.
https://digitalcommons.unmc.edu/coph_slce/236