Nocturnal Dyspnea During Severe Exacerbations Is Associated With Mortality Risk in COPD

Nighttime symptoms are common in patients with stable COPD, although they have not been well defined, they are probably underreported and/or underestimated, and their physiopathology is not entirely clear.[1][1]-[3][2] Nighttime symptoms, and dyspnea in particular, are associated with more severe