ADHD risk increased by allergies and asthma.

adhdThe incidents of () in children diagnosed with the behavioral in the United States are once again increasing. A new study, published in the August issue of , Asthma & Immunology, suggests that is linked with allergies and asthma.

, a chronic , is most commonly found in males, while asthma is also more common in young boys than girls,” said Eelko Hak, lead . “We found there is an increased risk of in boys with a and an even stronger risk associated with .”

The study group consisted of 884 boys with and 3,536 boys without the disorder. Of the children with , 34 percent had asthma and 35 percent had an allergic disorder. The study suggests medications used to treat these conditions may be associated with an increased risk.

“Further research is needed to understand why there appears to be an increased risk of developing in children with allergy and asthma,” said Gailen Marshall, MD, editor-in-chief of , Asthma & Immunology.

There is a genetic trend with allergy and asthma often occurring in families. If both parents have an allergy a child has a 75 percent chance of being allergic. If neither parent has allergy, the chance of a child developing an allergy is only 10 to 15 percent. Allergists also know allergies and asthma are linked. An estimated 60 to 80 percent of children with asthma also have an allergy.

Source

Eelko Hak, Tjalling W. de Vries, Pieter J. Hoekstra, Susan S. Jick. Association of childhood attention-deficit/hyperactivity disorder with and ? A matched case-control study using the General Practice . , Asthma & Immunology, 2013; 111 (2): 102 DOI: 10.1016/j.anai.2013.05.023

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