Prevalence and features of asthma-COPD overlap in the United States 2007-2012.
Angelico MendyErick FornoTheophile NiyonsengaRyan CarnahanJanvier GasanaPublished in: The clinical respiratory journal (2018)
Age-adjusted prevalence of ACO in the United States was 1.05% in 2007-2012, representing 0.94 (95% CI: 0.62-1.26) million Americans. It is much lower than previously reported. The overlap was associated with higher asthma and COPD severity as well as decreased lung function compared with COPD or asthma alone.