Researchers at the American College of Allergy, Asthma and Immunology 2016 Annual Scientific Meeting are calling for more research into the overlap of asthma and COPD.

Patients with asthma-COPD overlap syndrome (ACOS) have a more complicated treatment picture than patients with COPD or asthma alone and decisions about treatment are further complicated by the absence of randomized trials for the condition.

“It is very difficult to know what to do in asthma-COPD overlap syndrome because we don’t have randomized trials looking specifically at this patient population,” said R. Stokes Peebles, MD, of Vanderbilt University in Nashville, speaking at ACAAI 2016.