Correlation between treatment response and cough
Since the multivariate model showed that cough was associated with
treatment response, we conducted an additional analysis for cough (Table
4). We classified cough into 2 groups based on symptoms; some patients
had intermittent cough in particular situations or time, especially
during sleep at night, while others experienced persistent cough all
day. Treatment response showed a negative association with the degree of
cough (86.7% in no cough vs. 75.0% in intermittent cough vs. 47.1% in
persistent cough, P = 0.023).