Genetic Analysis of Smoking Behavior in the Framingham Heart Study
Author Information
Author(s): Ellen L Goode, Michael D Badzioch, Helen Kim, France Gagnon, Laura S Rozek, Karen L Edwards, Gail P Jarvik
Primary Institution: Fred Hutchinson Cancer Research Center
Hypothesis
Cigarette smoking behavior may have a genetic basis.
Conclusion
The study suggests a genetic component to smoking behavior, with evidence of two important quantitative trait loci (QTLs) identified.
Supporting Evidence
- Heritability of the maximum number of cigarettes smoked per day was estimated to be approximately 21%.
- Two large QTLs were identified, contributing approximately 28% and 20% to the trait's variance.
- Linkage signals were observed on chromosomes 2, 17, and 20.
Takeaway
This study looked at how genes might affect how many cigarettes people smoke each day, finding that genetics play a role.
Methodology
The study used data from the Framingham Heart Study to analyze the maximum number of cigarettes smoked per day and employed various genetic analysis methods including variance components and Bayesian MCMC.
Limitations
No linkage result met genome-wide statistical significance criteria, and the true relationship between identified regions and smoking behavior remains unclear.
Participant Demographics
The study included 2883 participants, with 1743 ever-smokers and 1140 never-smokers.
Statistical Information
P-Value
p < 0.001
Statistical Significance
p < 0.001
Digital Object Identifier (DOI)
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