AB031. Validation of claims approach to identify asthma and COPD overlap syndrome patients in the United States

Background With the increasing recognition of asthma and chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) and its significant disease and economic burden, knowledge about real-world patient characteristics and how they are treated is needed to aid in better understanding this phenotype. However, ACOS patient identification is challenging. Currently, there is no validated claims-based ACOS patient selection algorithm available to assist this type of research. To assess the validity of a retrospective claims-based algorithm to identify high likelihood ACOS patients using patient medical records as the criterion.