Genetic Variants and Smoking Affect Lung Function Decline
Author Information
Author(s): Masuko Hironori, Sakamoto Tohru, Kaneko Yoshiko, Iijima Hiroaki, Naito Takashi, Noguchi Emiko, Hirota Tomomitsu, Tamari Mayumi, Hizawa Nobuyuki
Primary Institution: University of Tsukuba
Hypothesis
Particular genetic variants of the Nrf2 gene may be associated with a rapid decline in FEV1 due to cigarette smoking.
Conclusion
The study found that genetic variations in the Nrf2 gene influence the rate of annual FEV1 decline, particularly in smokers.
Supporting Evidence
- Annual FEV1 decline was significantly associated with smoking behavior.
- Mean annual FEV1 declines varied by genotype of the rs6726395 SNP.
- Individuals with the G/G genotype had a greater decline in FEV1 compared to those with the A/A genotype.
Takeaway
This study shows that some people might lose lung function faster if they smoke and have certain genes.
Methodology
A retrospective cohort study was conducted with 915 participants, analyzing their FEV1 decline using a linear mixed-effect model.
Potential Biases
Attrition bias may have affected the estimation of FEV1 decline.
Limitations
The study was retrospective, which may introduce bias, and it excluded individuals with preexisting lung conditions.
Participant Demographics
Participants were 915 Japanese individuals, average age 52.1 years, including 63% never-smokers, 23% ex-smokers, and 14% current-smokers.
Statistical Information
P-Value
0.011
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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