Table 7. The relationship between esophageal manifestations of GERD and GER parameters according to pH-MII data

Indicators	Group A4 (with esophageal symptoms), n = 25	Group B4 (no esophageal symptoms), n = 17	p-value
	Median (IQR)	Median (IQR)
pH-MII parameters by pH channel
DeMeester score	29,54 (7,58-56,015)	5,73 (2,66-15,955)	0,003*
Reflux Index	8,5 (2,05-14,8)	1,1 (0,55-4,45)	0,001*
pH-MII parameters by impedance
General reflux1	115,2 (40,7-170,9)	188,8 (122,4-375,9)	0,003*
Acid reflux1	40,5 (11,15-90,05)	26,3 (13,35-56,4)	0,311
Weakly acid reflux1	51,7 (12,35-88,1)	127,6 (53,3-312)	0,001*
Alkaline reflux1	0 (0-4,25)	10,6 (1,75-47,3)	0,001*

number of episodes in 24 hours, 2 seconds,
p-value <0,05 was calculated using the nonparametric Mann-Whitney U-test (pH-MII parameters), IQR - interquartile range