Abstract
Purpose
In Asia, moderate alcohol users have better lung function. Never users have more inactive aldehyde dehydrogenase 2 (ALDH2) alleles (A) potentially generating confounding because inactive alleles may increase acetaldehyde exposure and reduce lung function.
Methods
We examined the association of ALDH2 genotypes with percentage predicted lung function (forced expiratory volume in 1 second; forced vital capacity) for age, sex, and height among 5641 older Chinese using multivariable linear regression.
Results
ALDH2 genotypes were associated with alcohol use and height but not other attributes. Inactive alleles were inversely associated with lung function (percentage predicted forced expiratory volume in 1 second −1.52%, 95% confidence interval [CI], −2.52% to −0.51% for one inactive allele and −2.05%, 95% CI, −3.85% to −0.26% for two inactive alleles compared with two active alleles; and for percentage predicted forced vital capacity −1.25%, 95% CI −2.15% to −0.35% and −1.65%, 95% CI, −3.25% to −0.04%). The association of moderate use with lung function was attenuated after adjusting for ALDH2, in addition to other potential confounders.
Conclusions
Previous findings in Chinese may be confounded by ALDH2. High frequency of inactive ALDH2 alleles in East Asia may exacerbate the effect of environmental acetaldehyde exposure on lung function and potentially on chronic obstructive pulmonary disease.
In Asia, moderate alcohol users have better lung function. Never users have more inactive aldehyde dehydrogenase 2 (ALDH2) alleles (A) potentially generating confounding because inactive alleles may increase acetaldehyde exposure and reduce lung function.
Methods
We examined the association of ALDH2 genotypes with percentage predicted lung function (forced expiratory volume in 1 second; forced vital capacity) for age, sex, and height among 5641 older Chinese using multivariable linear regression.
Results
ALDH2 genotypes were associated with alcohol use and height but not other attributes. Inactive alleles were inversely associated with lung function (percentage predicted forced expiratory volume in 1 second −1.52%, 95% confidence interval [CI], −2.52% to −0.51% for one inactive allele and −2.05%, 95% CI, −3.85% to −0.26% for two inactive alleles compared with two active alleles; and for percentage predicted forced vital capacity −1.25%, 95% CI −2.15% to −0.35% and −1.65%, 95% CI, −3.25% to −0.04%). The association of moderate use with lung function was attenuated after adjusting for ALDH2, in addition to other potential confounders.
Conclusions
Previous findings in Chinese may be confounded by ALDH2. High frequency of inactive ALDH2 alleles in East Asia may exacerbate the effect of environmental acetaldehyde exposure on lung function and potentially on chronic obstructive pulmonary disease.
| Original language | English |
|---|---|
| Pages (from-to) | 606-611 |
| Number of pages | 6 |
| Journal | Annals of Epidemiology |
| Volume | 24 |
| Issue number | 8 |
| Early online date | 6 Jun 2014 |
| DOIs | |
| Publication status | Published - 1 Aug 2014 |
Access to Document
- Cheng_Aldehyde_dehydrogenase_2_Annals_Epidemiology_2014
NOTICE: this is the author’s version of a work that was accepted for publication in Annals of Epidemiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Annals of Epidemiology, [VOL 24, ISSUE 8, August 2014] DOI: 10.1016/j.annepidem.2014.05.015. Eligibility for repository checked October 2014