From: Capability of hypertonic saline cough provocation test to predict the response to inhaled corticosteroids in chronic cough: a prospective, open-label study
Duration of treatment
Change in NO
Change in saline CDR
1 week
Rs = -0.47, p = 0.038
Rs = 0.37, p = 0.11
4 weeks
Rs = -0.40, p = 0.084
Rs = -0.27, p = 0.26
12 weeks
Rs = -0.39, p = 0.11
Rs = -0.45, p = 0.059