**4.1 Patients characteristics**

The study group included 25 women and 5 men, mean age 55.83 years (SD 15.17), reporting cough for the last 2 to 360 months (mean 48 months +/− 100.61) (**Table 1**).

The results of the RFS and the RSI questionnaire showed the risk of reflux in participating patients, RFS = 18.96 (SD 7.02) and RSI = 10.82 (SD 2.73) (**Table 1**). A statistically significant correlation was found between the age of patients and the result of RFS (p = .03).
