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Breastfeeding Offers Protection Against Obesity in Children of Recently Immigrated Latina Women

Abstract

Breastfeeding has been found to have a protective effect on subsequent development of obesity in childhood, particularly in white, non-Hispanic populations. The protective effect of nursing for more than 12 months in children of Latina women is less clear, which may be due to differences in levels of acculturation in previously studied populations. We evaluated the association between breastfeeding for 12 months or more and risk for obesity in a cohort of children of recently immigrated relatively unacculturated Latina mothers. Maternal characteristics at birth, including length of stay in the United States, breastfeeding habits at 4-6 weeks of age, 6 months, and 1 year, and anthropometric measurements were obtained for a cohort of 196 children participating in a prospective study. At 1 year of age 39.0% of infants were being breastfed. Being breastfed at 1 year of age was associated with a decreased risk of obesity in both univariate (odds ratio (OR) 0.49, 95% confidence interval (CI) 0.21-0.83) and multivariate models (OR 0.39, 95% CI 0.02-0.93) adjusting for maternal BMI, marital status, education level, country of origin, age, years of living in the United States, and child's birth weight at 3 years of age, regardless of mother's acculturation status using length of stay in the United States as a proxy for acculturation. The association with breastfeeding persisted at 4 years of age as a protective factor for obesity (OR 0.29, 95% CI 0.11-0.80). Breastfeeding for longer than 12 months provides a significant protective effect on the development of obesity in early childhood in a cohort of children of high-risk recently immigrated Latina women in San Francisco who were relatively unacculturated to the United States.

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