Table 1. The main characteristics of the studied patient population

Characteristics	Children with RCRD, n=42
Age	4 months - 17 years oldMe – 2.75, [IQR 1.08-9.42]
Male/Female	26/16
Structure of RCRD	n/total (%)
Chronic pharyngitis	2 (5)
Chronic laryngitis	1 (2)
Recurrent otitis media	1 (2)
Recurrent croup	0 (0)
Bronchopulmonary dysplasia	0 (0)
Recurrent pneumonia	11 (26)
Recurrent bronchitis	5 (12)
Recurrent obstructive bronchitis	9 (22)
Bronchial asthma	5 (12)
Obliterating bronchiolitis	6 (14)
Bronchiolitis obliterans with organizing pneumonia	0 (0)
Bronchiectasis	2 (5)