Breast-feeding and atopic disease: a cohort study from childhood to middle age

Melanie Claire Matheson1, Bircan Erbas, Aindralal Balasuriya

  • 1Center for Molecular, Environmental, Genetic & Analytic Epidemiology, School of Population Health, University of Melbourne, Melbourne, Australia. mcmat@unimelb.edu.au

Insights

Exclusive breastfeeding may protect against early childhood asthma but increases the risk of allergic asthma and atopy later in life. This finding challenges long-term recommendations for high-risk infants.

Area of Science:

  • Pediatrics
  • Immunology
  • Epidemiology

Background:

  • The relationship between breastfeeding and atopic diseases is debated, with existing literature showing contradictory findings.
  • Understanding long-term effects of breastfeeding on atopy is crucial for public health recommendations.

Purpose of the Study:

  • To investigate the association between exclusive breastfeeding and the development of atopic disorders.
  • To assess these associations in a cohort followed from childhood into middle age.

Main Methods:

  • A population-based prospective cohort study (Tasmanian Asthma Study) followed participants from age 7 to 44 years.
  • Exclusive breastfeeding in the first 3 months of life was analyzed as a risk factor for atopic diseases.
  • Statistical analyses included multiple logistic regression and generalized estimating equations.

Main Results:

  • At age 7, exclusive breastfeeding was associated with a marginally lower risk of asthma in children with a maternal history of atopy.
  • After age 7, exclusive breastfeeding was linked to an increased risk of asthma at ages 14, 32, and 44.
  • Exclusive breastfeeding reduced the risk of food allergy at age 7 but increased the risk of food allergy and allergic rhinitis at age 44.

Conclusions:

  • Exclusive breastfeeding offers protection against asthma before age 7 in infants with a maternal history of atopy.
  • The long-term benefits of exclusive breastfeeding for preventing allergic asthma and atopy require re-evaluation.
  • Current recommendations for breastfeeding high-risk infants for early wheezing illness are supported, but long-term protection against atopy needs reconsideration.
Abstract

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