From: The development of a patient-reported outcome measure for assessing nighttime symptoms of chronic obstructive pulmonary disease
Symptom
FG1 n = 8
FG2 n = 7
FG3 n = 4
FG4 n = 8
Use of rescue inhalers
X
Nighttime awakening (unattributed)
Awakened by cough
Awakened by shortness of breath
Awakened by wheezing