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. 2017 Oct;54(8):856-865.
doi: 10.1080/02770903.2016.1266496. Epub 2016 Dec 8.

Breastfeeding associated with higher lung function in African American youths with asthma

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Breastfeeding associated with higher lung function in African American youths with asthma

Sam S Oh et al. J Asthma. 2017 Oct.

Abstract

Objective: In the United States, Puerto Ricans and African Americans have lower prevalence of breastfeeding and worse clinical outcomes for asthma compared with other racial/ethnic groups. We hypothesize that the history of breastfeeding is associated with increased forced expiratory volume in 1 second (FEV1) % predicted and reduced asthma exacerbations in Latino and African American youths with asthma.

Methods: As part of the Genes-environments & Admixture in Latino Americans (GALA II) Study and the Study of African Americans, asthma, Genes & Environments (SAGE II), we conducted case-only analyses in children and adolescents aged 8-21 years with asthma from four different racial/ethnic groups: African Americans (n = 426), Mexican Americans (n = 424), mixed/other Latinos (n = 255), and Puerto Ricans (n = 629). We investigated the association between any breastfeeding in infancy and FEV1% predicted using multivariable linear regression; Poisson regression was used to determine the association between breastfeeding and asthma exacerbations.

Results: Prevalence of breastfeeding was lower in African Americans (59.4%) and Puerto Ricans (54.9%) compared to Mexican Americans (76.2%) and mixed/other Latinos (66.9%; p < 0.001). After adjusting for covariates, breastfeeding was associated with a 3.58% point increase in FEV1% predicted (p = 0.01) and a 21% reduction in asthma exacerbations (p = 0.03) in African Americans only.

Conclusion: Breastfeeding was associated with higher FEV1% predicted in asthma and reduced number of asthma exacerbations in African American youths, calling attention to continued support for breastfeeding.

Keywords: Asthma; Hispanics; breastfeeding; exacerbations; genetic admixture; lung function; minority.

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Conflict of interest statement

Declaration of Interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

Figures

Figure 1.
Figure 1.. Association between breastfeeding and FEV1 % predicted among youths with asthma in Study A and Study B: 2008–2014.
Estimates adjusted for proportion of Native American ancestry for Latinos, proportion of African ancestry for African Americans, body mass index category, socioeconomic status, total IgE levels, family history of asthma, chest illnesses before age of 2, maternal prenatal smoking, birth weight, recruitment center and sex.

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