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Genetic ancestry-smoking interactions and lung function in African Americans: A cohort Study

Aldrich, MC and Kumar, R and Colangelo, LA and Williams, LK and Sen, S and Kritchevsky, SB and Meibohm, B and Galanter, J and Hu, D and Gignoux, CR and Liu, Y and Harris, TB and Ziv, E and Zmuda, J and Garcia, M and Leak, TS and Foreman, MG and Smith, LJ and Fornage, M and Liu, K and Burchard, EG (2012) Genetic ancestry-smoking interactions and lung function in African Americans: A cohort Study. PLoS ONE, 7 (6).

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Background: Smoking tobacco reduces lung function. African Americans have both lower lung function and decreased metabolism of tobacco smoke compared to European Americans. African ancestry is also associated with lower pulmonary function in African Americans. We aimed to determine whether African ancestry modifies the association between smoking and lung function and its rate of decline in African Americans. Methodology/Principal Findings: We evaluated a prospective ongoing cohort of 1,281 African Americans participating in the Health, Aging, and Body Composition (Health ABC) Study initiated in 1997. We also examined an ongoing prospective cohort initiated in 1985 of 1,223 African Americans in the Coronary Artery Disease in Young Adults (CARDIA) Study. Pulmonary function and tobacco smoking exposure were measured at baseline and repeatedly over the follow-up period. Individual genetic ancestry proportions were estimated using ancestry informative markers selected to distinguish European and West African ancestry. African Americans with a high proportion of African ancestry had lower baseline forced expiratory volume in one second (FEV1) per pack-year of smoking (-5.7 ml FEV1/ smoking pack-year) compared with smokers with lower African ancestry (-4.6 ml in FEV1/ smoking pack-year) (interaction P value = 0.17). Longitudinal analyses revealed a suggestive interaction between smoking, and African ancestry on the rate of FEV1 decline in Health ABC and independently replicated in CARDIA. Conclusions/Significance: African American individuals with a high proportion of African ancestry are at greater risk for losing lung function while smoking. © 2012 Aldrich et al.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Aldrich, MC
Kumar, R
Colangelo, LA
Williams, LK
Sen, S
Kritchevsky, SB
Meibohm, B
Galanter, J
Hu, D
Gignoux, CR
Liu, Y
Harris, TB
Ziv, E
Zmuda, JZmudaJ@edc.pitt.eduEPIDJMZ
Garcia, M
Leak, TS
Foreman, MG
Smith, LJ
Fornage, M
Liu, K
Burchard, EG
ContributionContributors NameEmailPitt UsernameORCID
Date: 21 June 2012
Date Type: Publication
Journal or Publication Title: PLoS ONE
Volume: 7
Number: 6
DOI or Unique Handle: 10.1371/journal.pone.0039541
Schools and Programs: School of Public Health > Epidemiology
Refereed: Yes
PubMed Central ID: PMC3380861
PubMed ID: 22737244
Date Deposited: 11 Jul 2012 18:12
Last Modified: 22 Jun 2021 14:55


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