Breastfeeding duration modified the effects of neonatal and familial risk factors on childhood asthma and allergy: a population-based study.

Longer breastfeeding duration was inversely associated with childhood asthma and allergic diseases, and also reduced the OR of neonatal and familial risk factors on these diseases. Giving the prevalence of childhood asthma and allergic diseases is rapidly rising across the globe, these findings may have important clinical and public health implications.