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Trends in Post-Acute Care Use after Admissions for Sepsis.

not collected in this cohort, and is a limitation of this analysis. In contrast to findings in the Sleep Heart Health Study that showed no association between mild COPD and OSA in a community cohort (2), there is a high prevalence of COPD–OSA overlap in the present COPD cohort that may limit generalizability. Individuals with COPD and OSA have increased small airway WAF visualized by MDCT, which represents an airway phenotype not explained by poor lung function alone. This intriguing finding, though unlikely to change clinical practice, adds to existing literature on airway changes in COPD based onMDCT imaging and is worthy of further study. This evidence does not point to a new modality to screen for OSA; however, gaining an understanding of how airway measurements change with COPD and OSA is important for potential treatment with positive pressure. If OSA heightensWAF in COPD, understanding the underlying mechanisms is important, given the implications for treatment strategies and potential for improved outcomes in this high-risk population.