Fig. 2

Gender and age distribution of overall chronic cough patients presenting to the clinics. A Gender distribution of all chronic cough patients. B Age distribution of all chronic cough patients. Total-percentage (%): ratio of the number of patients in different age to the total number of cough patients (n = 933). Female/male-percentage (%): ratio of the number of patients in different age to the number of females (n = 487) or males (n = 446)