Table 4. Relationship between age and reflux variants, number of refluxes (n = 42)

Reflux variants	<3 years old n = 20	>3 years old n = 22	p-value
	Median (IQR)	Median (IQR)
pH-MII parameters by pH channel
DeMeester score	23.54 (6.2875 - 46.0975)	8.995 (3.255 - 31.3525)	0.217
Reflux Index	6.15 (1.55 -14.175)	2 (0.7 -8.5)	0.137
Acid reflux	75.9 (29.9 - 126.7)	44.9 (13.55 -87.775)	0.124
pH-MII parameters by impedance channel
General reflux1	136.35 (29.8 - 187.4)	172.85 (70.55 - 310.775)	0.059
Acid reflux1	36.65 (9.6 - 90.425)	33.75 (15.05 - 69.075)	0.880
Weakly acid reflux1	59 (12.7 - 104.025)	86.7 (48.75 - 277.95)	0.092
Alkaline reflux1	0 (0 - 3.2)	5.95 (0 - 34.45)	0.009*

Number of episodes in 24 hours,
p <0.05 was calculated using the nonparametric Mann-Whitney U-test; IQR - interquartile range