Early respiratory infections linked to atopic dermatitis diagnosis

A recent study published in JAMA Dermatology has found a link between early respiratory infections and the diagnosis of atopic dermatitis (AD) in children. Researchers from the University of Copenhagen and colleagues analyzed data from two cohorts of children in Denmark and the United States, ages 0 to 10 years and 0 to 6 years, respectively. The study aimed to determine whether the burden of early infections and specific infection subtypes were associated with the development of childhood AD.

The researchers discovered that children in the upper third of infection episodes and days during the COPSAC2010 birth cohort had a higher risk of yearly AD prevalence compared to those in the lower third. This increased risk remained consistent even after accounting for antibiotic treatments and genetic variants associated with AD. The risk of AD was found to be higher with each additional infection episode, suggesting a dose-response relationship between infections and the development of AD.

In the VDAART cohort, children in the upper third of infection episodes also had a significantly higher risk of developing AD during the first six years of life compared to those in the lowest third. The odds ratio for this increased risk was 1.76, and the risk continued to rise with each additional infection episode.

The authors of the study emphasize that these findings highlight a long-term relationship between early respiratory infections and the development of AD, a relationship that has been previously unclear due to inconsistent results in previous studies. The association between early infection burden and AD prevalence was more pronounced in respiratory infections compared to other types of infections, indicating that respiratory infections may play a significant role in the development of AD in children.