An analysis of data concerning the first twenty years of the life of nearly one million Danes suggests that children born to asthmatic mothers may have up to a 41% increased risk for attention-deficit/hyperactivity disorder (ADHD) while having a father with asthma is associated with a 13% elevated risk for ADHD. The study authors conclude, “These results support theories regarding shared genetic and environmental risk factors having a role in the development of ADHD.” Brain, Behavior, & Immunity, August 2019