Table 1. Symptom distribution between different age groups.

	Group 1 (n = 59)	Group 2 (n = 77)	Group 3 (n = 82)
Isolated gastrointestinal symptoms	17 (28.8%)	36 (46.8%)	52 (63.4%)	p<0.001
Isolated extraesophageal symptoms	9 (15.3%)	14 (18.2%)	13 (15,9%)
Concomitant appearance of gastrointestinal and extraesophageal symptoms	33 (55.9%)	27 (35.1%)	17 (20.7%)
Gastrointestinal symptoms
Vomiting/Regurgitation	49 (83%)	55 (71.4%)	34 (41.5%)	p<0.001
Heartburn	0	8 (10.4%)	35 (42.7%)
Epigastric pain	1 (2%)	10 (13%)	27 (32.9%)
Back arching	17 (28.8%)	6 (7.8%)	0
Respiratory symptoms
Cough	26 (44.1%)	38 (49.4%)	25 (30.4%)	p<0.001
Apnea	17 (28.8%)	1 (1.3%)	0