Truth or fiction: risk factors for childhood atopic dermatitis.

Atopic dermatitis is increasing in prevalence throughout the developed world, in parallel with asthma and hay fever. The reasons for the increase remain unclear. As a practical question, it is valuable to understand which interventions might decrease risk for childhood atopic disease. Prospective studies among infants and children are challenging to design and to execute. Fortunately, several large studies from Europe and the United States are better characterizing whether behavioral interventions such as breastfeeding, delayed introduction of solid foods, hydrolyzed protein infant formulas, or pets in the home might be protective or impart increased risk of developing atopic dermatitis. As this body of literature grows, physicians will be able to recommend behavioral interventions that can prevent atopic dermatitis in individuals and ideally decrease prevalence over the population.